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Journal articles on the topic 'Shaft sinking'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

Levit, Viktor, Viacheslav Kamenets, and Yuriy Mukomel. "ABOUT EXPERIENCE AND PROSPECTS OF VERTICAL SHAFTS SINKING TECHNOLOGIES APPLICATION IN UKRAINE." SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”, no. 3(23)-4(24) 2020 (2020): 78–100. http://dx.doi.org/10.31474/2073-9575-2020-3(23)-4(24)-78-100.

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Purpose. Analysis of production experience, scientific and technical developments and assessment of the prospects for the application and development of technologies for the construction of vertical shafts in Ukraine in the context of the need to restore the coal mining industry to preserve the energy independence of the state. Methodology. The methods of analysis of the accumulated production experience of shaft sinking in Ukraine, in the post-Soviet space and in the leading mining countries, as well as scientific and technical literature were used. Results. The classification of technologies and methods of vertical shaft sinking is considered and supplemented, technological schemes and equipment used and promising for Ukraine for the construction of shafts by conventional and special methods are analyzed, the production experience of the Donetskshakhtoprokhodka and Spetsshakhtobureniie trusts is generalized from the point of view of applicability in the construction of shafts of block No. 12 of PJSC Shakhtopravlenie Pokrovskoe”. The possibility of using a modified parallel technological scheme of shaft sinking has been substantiated. The prospects of mechanized shaft sinking in Ukraine – by drilling and with the use of shaft-sinking machines – are assessed. The characteristics of the conditions for the construction and operation of shaft lining, the final element of the shaft, as a structure and functional complex are given. Variants of combined lining, including those with the use of fiber-reinforced concrete, are considered. Scientific novelty. The results of the analysis of technological schemes and methods of vertical shafts sinking, accumulated production experience and scientific and technical developments are generalized, trends and prospects for the development of technologies are considered. Practical value. The analysis of technological schemes and methods of sinking vertical shafts was carried out on the basis of domestic and foreign production experience. Key words: vertical shaft, sinking technology, shaft sinking flow chart, drilling and blasting operations, shafts drilling, shaft-sinking machine.

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2

Igolka, D. A., and F. Otten. "Rapid Mechanized Shaft Sinking." Mining Industry (Gornay Promishlennost), no. 6/2020 (December 29, 2020): 22–29. http://dx.doi.org/10.30686/1609-9192-2020-6-22-29.

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REDPATH DEILMANN GmbH from Germany has been sinking and lining two shafts and initial underground development since 2017 on the territory of the Republic of Belarus (Starobinskoe potassium salt deposit, Luban) by request of Slavkaliy LLC. Shaft sinking is one of the most complicated and time-consuming stages in renovation and construction of new underground mines. In the absolute majority of cases, shaft sinking and lining are at the critical path for implementation of such projects. Rapid rates of shaft construction ensure high technical and economic performance during the commissioning phase and earlier supply of end products to the market. The article introduces an innovative method of mechanized mine shaft sinking that provides rapid parallel sinking and lining of the mine shafts. Unique mechanized shaft boring roadheaders (SBR) manufactured by Herrenknecht are employed. Shaft sinking is done in complicate geotechnical and geological conditions intensified by a very low stability of the rocks using a dedicated rock freezing method. Modern materials are used for additional hydrosealing of the tubing liner. Workings in the near shaft insets are driven with roadheaders. A combination of all these solutions makes it possible to accelerate shaft sinking in a safe way without blasting operations and with high technical and economic performance both for the shaft sinking project and the overall construction of the mining and processing plant.

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3

Neye, Esther, Werner Burger, and Patrick Rennkamp. "Rapid shaft sinking." Mining Report 149, no. 4 (August 2013): 250–55. http://dx.doi.org/10.1002/mire.201300029.

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4

Borshchevskyi, S. V., K. M. Labinskyi, and S. Yu Halechko. "TO THE QUESTION OF THE ENHANCEMENT OF THE MECHANICAL PROPERTIES AND WATER RESISTANCE OF THE CONCRETE LINING." Science and Transport Progress, no. 17 (August 25, 2007): 195–201. http://dx.doi.org/10.15802/stp2007/17626.

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The basic ways on increase durability and hydroproof properties concrete fastening, promoting organization wаterleaks are considered at shaft vertical sinking of mines by development resources-protect technologies of shaft sinking. The questions of increase of waterproofing properties concrete of shafts are considered. The results of laboratory researches are submitted and the directions of perfection of technology shaft sinking in conditions raised water flows are offered.

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5

Prokopov, Albert, Marina Prokopova, and Andrey Medvedev. "The use of piles with an adjustable operation mode to restraint the shaft sinking systems’ supporting structures." E3S Web of Conferences 281 (2021): 01013. http://dx.doi.org/10.1051/e3sconf/202128101013.

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The article deals with the problem of ensuring the stability of grillages and pile foundations used to hold shaft sinking systems during the construction of vertical subway shafts. The features of such foundations’ operation in the process of shaft sinking are investigated, in contrast to similar structures that receive pressure from a building under construction. The importance of taking into account the mutual influence of shaft sinking and pile foundations of the shaft sinking systems’ supporting structures is shown. The design of bored piles and the technological scheme of mortar injection are proposed, which provide a change in the operating mode of pile foundations and regulation of its bearing capacity.

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6

Bołoz, Łukasz. "The analysis of shaft sinking progress as a function of technical and organizational parameters." Multidisciplinary Aspects of Production Engineering 2, no. 1 (September 1, 2019): 203–12. http://dx.doi.org/10.2478/mape-2019-0020.

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Abstract In underground mines, where the deposit is located at considerable depths, mining shafts are key excavations. The project of making the deposit available requires selection of appropriate shaft sinking technology adapted to geological and hydrological conditions and natural hazards. Shafts can be made using the classic drilling and blasting technique or mechanical cutting of the shaft face. Mechanical cutting requires the use of a mining machine, which together with machines for loading and hauling the output and protecting the side walls is a shaft complex. Drilling using mechanized shaft complexes allows for high efficiency and work safety. To improve the efficiency of drilling, it is particularly important to implement many processes in parallel. The article presents an analysis of the progress of shaft sinking with a mechanized complex as a function of technical and organizational parameters. The analysis concerned a new generation cutting shaft complex, developed for the needs of shaft sinking for one of the Polish hard coal mines. The calculations were carried out for a shaft with a maximum diameter of 9.5 m and a total depth of 830 m. The article briefly presents a new solution for the shaft complex. There are presented results of calculations of daily drilling progress and total time of shaft sinking for the developed working technology of this complex. The efficiency of the complex depends on many factors related to technical parameters of individual machines and devices forming the complex and organizational parameters, hence a multi-variant analysis was carried out.

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7

d’Obyrn, Kajetan, Paweł Kamiński, and Jacek Motyka. "Influence of Hydrogeological Investigation’s Accuracy on Technology of Shaft Sinking and Design of Shaft Lining—Case Study from Southern Poland." Energies 14, no. 8 (April 7, 2021): 2050. http://dx.doi.org/10.3390/en14082050.

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Accuracy of hydrogeological and geotechnical investigation in place of shaft sinking is a key factor for selection of sinking method and design of the shaft lining. The following work presents the influence of the rising level of accuracy of geological data gathered in the area of shaft sinking in the Silesian Coal Basin and technical projects of shaft lining and technology of its sinking, which have been changing over the years. The initial project of the shaft was repeatedly modified. Each modification eventuated in rising requirements for the shaft lining, such as increasing its thickness or changing concrete class. It has become necessary to use additional methods of reinforcing rock mass around the shaft.

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8

Pershin, Vladimir, Aleksandr Kopytov, and Ahmed Wetti. "Research in the Impact of Dynamic Loads for the Development of Pentice Designs when Sinking Skip Shafts." E3S Web of Conferences 105 (2019): 01056. http://dx.doi.org/10.1051/e3sconf/201910501056.

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In order to protect workers engaged in shaft sinking works artificial protective equipment (buntons) with the support element from powerful I-beams or truss structures are used. They have to withstand enormous push loading, be strong, simple in design, have less labor input during construction and dismantling. Under shaft sinking in case of skip operational winding performance, a protective bunton can be exposed to the rock mass flow in the event of an emergency full skip run. To substantiate the variables and develop the design of pentices when sinking an active hoisting shaft, the skip falls time dependence on the changes in its fall height, taking into account the velocity and the air stream direction in the shaft, was established using mathematical modeling. LLC “SibGorComplexEngineering” together with the Department of Construction of Underground Structures and Mines of T.F. Gorbachev Kuzbass State Technical University have developed several new designs variants of protective buntons for vertical shafts sinking in case of operational winding performance. It is a Z-shaped structure of the offset in height, parallel to each other of upper and lower protective buntons, bushed with sloped reflective metal sheets and it is interconnected by a vertical division wall.

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9

Lashgari, Ali, Mohamad Majid Fouladgar, Abdolreza Yazdani-Chamzini, and Miroslaw J. Skibniewski. "USING AN INTEGRATED MODEL FOR SHAFT SINKING METHOD SELECTION / KOMPLEKSINIO MODELIO NAUDOJIMAS GRĘŽINIŲ ĮRENGIMO METODUI PARINKTI." Journal of Civil Engineering and Management 17, no. 4 (December 21, 2011): 569–80. http://dx.doi.org/10.3846/13923730.2011.628687.

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Shafts have critical importance in deep mines and underground constructions. There are several traditional and mechanized methods for shaft sinking operations. Using mechanized excavation technique is an applicable alternative to improve project performance, although impose a huge capital cost. There are a number of key parameters for this selection which often are in conflict with each other and decision maker should seek a balance between these parameters. Therefore, shaft sinking method selection is a multi criteria decision making problem. This paper intends to use the combination of analytical hierarchy process and TOPSIS (Technique for Order Performance by Similarity to Ideal Solution) methods under fuzzy environment in order to select a proper shaft sinking method. A real world application is conducted to illustrate the utilization of the model for the shaft sinking problem in Parvadeh Coal Mine. The results show that using raise boring machine is selected as the most appropriate shaft sinking method for this mine. Santrauka Gręžiniai yra labai svarbūs giliose šachtose ir požeminėse konstrukcijose. Gręžiniai įrengiami keliais tradiciniais ir mechanizuotais metodais. Mechanizuotos žemės kasimo technologijos yra galima alternatyva, gerinanti projekto įgyvendinimą, tačiau tam reikia didžiulių kapitalo išlaidų. Pasirinkimui įtaką daro daug tarpusavyje nederančių rodiklių, tad sprendimą priimantis asmuo turi rasti balansą tarp jų. Todėl grųžiniu įrengimo metodo parinkimas yra daugiakriterinių sprendimų priėmimo problemą. Šiame straipsnyje naudojama analitinio hierarchinio proceso ir TOPSIS (artumo idealiajam taškui) metodo neraiškioje aplinkoje kombinacija tinkamam gręžinių įrengimo metodui parinkti. Modelio naudojimo atvejis iliustruojamas realiu pavyzdžiu, sprendžiant gręžinių irengimo problemą Parvadeh anglių kasykloje. Rezultatai rodo, kad keliamasis gręžimo įrenginys parenkamas kaip tinkamiausias gręžiniams įrengti šioje kasykloje.

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10

Jiang, Hao Liang, and Ri Hui Liu. "Experimental Study on Inner Reinforced Concrete-Block Composite Shaft Lining." Advanced Materials Research 163-167 (December 2010): 1316–20. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.1316.

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Inner reinforced concrete-block composite shaft lining was widely used in vertical shaft sinking by vertical shaft sinking machine (VSM) and freezing shaft. In this paper, the deformation characteristic, failure Patten and the load Bering capacity of inner reinforced concrete-block composite shaft lining are presented ,based on the model test .and the test data are provide for the design and calculation of this kinds of composite shaft lining.

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11

Liu, Ji Min, and Chang Bo Wang. "Numerical Analysis on Vertical Structural Stability of Floating Drilled Shaft during Sinking." Advanced Materials Research 368-373 (October 2011): 2625–29. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.2625.

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The vertical structural stability of floating drilled shaft during sinking is an important practical issue on the safety of boring technique in the deep and thick alluvium. In fact, the vertical structural stability of shaft lining is a matter of overturn buckling. Theoretical analysis shows that the height of balance water (HBW) is the most important factor for the vertical structural stability of shaft lining. If the HBW is controlled in a reasonable range, the shaft lining will not buckle during construction. The shaft lining is regarded as a slender bar with closed bottom and floating in the mud while sinking. According to the mechanical analysis on the shaft lining from floating and sinking to the process of contacting the well bottom, a reasonable range of the HBW is deduced. Finally, with practical instances, the author in this article introduces the calculation principle in vertical structural stability of shaft lining while sinking and floating using finite element method (FEM). The simulation results show that in the reasonable range of HBW, the stability of shaft lining increases as the height of balance water goes up.

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12

Jiang, Hao Liang. "Introduction of Vertical Mine Shaft Sinking by Full Section Boring Method." Advanced Materials Research 446-449 (January 2012): 3706–9. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3706.

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The shaft drilling method is a fully mechanized operated mine shaft sinking method when shaft sinking through the soft and weak overburden layer. the new full section boring method can reduce the number of reaming, the number of bits, energy consumption and increase completed advance rate of shaft over 20%, reduce emissions of waste drilling mud by 20% . The paper in detail stated the features of the Full Section boring method operation，the implementation mode，design principle and support technology．

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13

Bittner, F. "Rheinberg shaft: sinking and lining the freezing shaft (In German)." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 28, no. 6 (November 1991): A392. http://dx.doi.org/10.1016/0148-9062(91)91619-3.

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14

Didari, Vedat, and Hasan Gerçek. "Sinking of the deepest shaft in Turkey." Mining Science and Technology 7, no. 2 (July 1988): 217–24. http://dx.doi.org/10.1016/s0167-9031(88)90622-6.

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15

Jeffery, R. I., and G. P. Daw. "Hydrogeological investigations and assessments for shaft sinking." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 27, no. 2 (April 1990): A92. http://dx.doi.org/10.1016/0148-9062(90)95085-f.

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16

Smorodinov, M. I., B. S. Ostyukov, and A. A. Arsen'ev. "Friction force decrease in drop shaft sinking." Soil Mechanics and Foundation Engineering 24, no. 4 (July 1987): 149–53. http://dx.doi.org/10.1007/bf01716866.

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17

Polozov, Ju A., and I. V. Popov. "Grouting of porous aquifers during shaft sinking." International Journal of Mine Water 4, no. 1 (March 1985): 25–31. http://dx.doi.org/10.1007/bf02505378.

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18

Neye, Esther, Werner Burger, and Patrick Rennkamp. "Rapid shaft sinking / Mechanisiertes Abteufen von Schächten." Geomechanics and Tunnelling 6, no. 5 (October 2013): 559–68. http://dx.doi.org/10.1002/geot.201300045.

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19

Luz, José Aurélio Medeiros da, José Margarida da Silva, and Pedro Henrique Neuppmann. "Diagnosis of the production cycle in the small shaft sinking." Research, Society and Development 11, no. 5 (April 12, 2022): e44711528233. http://dx.doi.org/10.33448/rsd-v11i5.28233.

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Shaft sinking is a classic activity in underground mines. In shafts with small cross-section or in mines with low mechanization indices it is common to use hand pneumatic drills and blasting by explosive gelatin in cartridges, employing natural draft or flexible ducts with axial fans for gases and fumes exhaustion, muck removal by hand shoveling into hoistable dumping buckets. System of this type has been studied here, consisting of a rectangular cross-section shaft (3.7 m x 2.0 m), with final depth of 94 m, excavated in order to obtain samples for a pilot-scale mineral processing testwork, before the open pit mine’s industrial startup. The shaft had a concrete collar and its walls were supported by wooden sets spaced 1.5 m and 25 mm thick wooden planks as liners. This shaft has been excavated in schist rocks belonging to the metamorphosed hydrothermal deposit of copper and gold located in Chapada (municipality of Mara Rosa, Brazil). Daily production worksheets covering one month campaign were statistically analyzed, encompassing the entire cycle of mining operations, namely drilling, charging and blasting, fumes exhaustion, mucking, wall and face trimming and scaling, and assemblage of support system. Operation downtimes were also quantified. Statistical analysis of productivity indices allowed the detection of critical points of the operation and the establishment reference for similar mining operations.

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20

Rutkowski, Wojciech, and Tomasz Lipecki. "Use of the iPhone 13 Pro LiDAR Scanner for Inspection and Measurement in the Mineshaft Sinking Process." Remote Sensing 15, no. 21 (October 24, 2023): 5089. http://dx.doi.org/10.3390/rs15215089.

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This article aims to present the possibility of using the low-cost iPhone 13 Pro LiDAR scanning device for inspections in the process of mineshaft sinking. The main goal of the research was to assess the accuracy and usefulness of the 3D models generated by the scanner. Measurements were performed at seven different concrete lining intervals before the final lining was completed. The measurements were made at the GG-1 ventilation shaft in Kwielice, Poland, at depths from 1320 to 1350 m below ground level. For better understanding of the true potential of using simple spatial models in the shaft sinking process, part of the shaft sinking cycle, in accordance with PeBeKa working technology, is first presented. Validation using professional TLS demonstrates the usefulness of the iPhone 13 Pro LiDAR scanner for the purpose of inspections that do not require a high level of accuracy. Additionally, a quick and reliable method of volume calculation using open-source software is shown and evaluated.

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21

Pankratenko, Alexander, and Alexander Isaev. "The Analysis of the Stress-Strain State of the System “Equipment Complex - Support - Rock Mass” in the Bottomhole Area of the Shaft." E3S Web of Conferences 41 (2018): 01038. http://dx.doi.org/10.1051/e3sconf/20184101038.

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The development of new deposits enterprises requires the construction of deep and super deep vertical shafts. The duration of their construction reaches 8 - 10 years with multi-billion capital investments. To reduce the payback period of these costs, it is necessary to develop and implement effective solutions to increase the speed of sinking operations through the wide introduction of brand-new mechanized equipment complexes. In response to the sinking in the bottomhole area of the shaft a complex, the following geotechnological system is being formed: "tunneling system - support - rock mass", the regularities of which require further study. For these purposes, an analytical method for calculating the shaft support can be used in the context of consideration of a planar contact problem at various phases of the system operation. The mutual coordination of individual phases in accordance with the classical concepts of the underground structures mechanics is possible with the help of a correction factor to the magnitude of horizontal stresses in the rock mass. In this paper we developed the algorithm which determines this coefficient, taking into account the influence of the main technological factors: the jack system pressure of the complex and the speed of sinking.

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22

Pankratenko, Alexander, Mikhail Pleshko, and Alexander Isaev. "Analytical analysis of the stress-strain state of the system “mechanized equipment complex - support – rock mass” in the bottomhole area of the shaft." MATEC Web of Conferences 193 (2018): 02026. http://dx.doi.org/10.1051/matecconf/201819302026.

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The development of new deposits requires the construction of deep and super deep vertical shafts. The duration of their construction reaches 8 - 10 years with multi-billion capital investments. To reduce the payback period of these costs, it is necessary to develop and implement effective solutions to increase the speed of sinking operations through the wide introduction of brand-new mechanized equipment complexes. In response to the sinking in the bottomhole area of the shaft, the following geotechnical system is being formed: “tunnelling system - support - rock mass”, the regularities of which require further study. For these purposes, an analytical method for calculating the shaft support can be used in the context of consideration of a planar contact problem at various phases of the system operation. The mutual coordination of individual phases in accordance with the classical concepts of the underground structures mechanics is possible using a correction factor to the magnitude of horizontal stresses in the rock mass. In this paper, we developed the algorithm which determines this coefficient, taking into account the influence of the main technological factors: the pressure of the jack system of the complex and the speed of sinking.

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23

Silchenko, Yu A., and M. S. Pleshko. "Shaft lining design with regard to sinking technology." Mining informational and analytical bulletin, no. 11 (2020): 96–107. http://dx.doi.org/10.25018/0236-1493-2020-11-0-96-107.

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24

Allenby, Douglas, and David Kilburn. "Overview of underpinning and caisson shaft-sinking techniques." Proceedings of the Institution of Civil Engineers - Geotechnical Engineering 168, no. 1 (February 2015): 3–15. http://dx.doi.org/10.1680/geng.13.00117.

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25

Cao, Maoyong, Huibin Liang, Di Fan, Yi Wang, Hao Jiang, and Nongliang Sun. "Ultrasonic logging instrument for shaft sinking by drilling." Measurement 132 (January 2019): 344–49. http://dx.doi.org/10.1016/j.measurement.2018.03.074.

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26

Pankratenko, Alexander, and Alexander Isaev. "The study of the influence of the rock mass heterogeneity on the stress-strain state of the shaft lining." MATEC Web of Conferences 265 (2019): 04019. http://dx.doi.org/10.1051/matecconf/201926504019.

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Shafts often cross sections of a layered mass of rocks of different strength during the sinking. The article deals with the design case of interaction of monolithic concrete lining in the bottomhole zone of the shaft with a mass containing a rock layer with low stress-strain properties. To study its influence, spatial numerical models have been developed, which allowed us to consider several indicative positions of the «weak» layer referred to the shaft lining. The analysis of calculation results shows that in case of direct contact of the support with a «weak» layer, the increase in stress intensity in it can reach 5-fold values and is determined by the thickness of the «weak» layer and its stress-related characteristics. The most effective control action in this context is the advance hardening of the «weak» layer before its expo-sure during the sinking.

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27

Jiang, Hao Liang, and Ri Hui Liu. "Experiment Study on Concrete Block Model Shaft Lining Used in Freezing Shaft." Advanced Materials Research 163-167 (December 2010): 1307–11. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.1307.

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The deformation characteristic load-deformation curve, failure Patten and the load bearing capacity of concrete block shaft lining under uniform and non-uniform load condition are presented. They were got from the mechanical property test of layered concrete block masses. And the large Structure test of concrete block lining series of test data are provided for the design and calculation of concrete block lining, and the deformation control under sinking of freezing shaft in which this kind of lining is utilized.

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28

Sunuwar, Subas Chandra. "Challenges of shaft excavation in Nepal Himalaya: case study from hydropower projects." Journal of Nepal Geological Society 50, no. 1 (December 21, 2016): 31–37. http://dx.doi.org/10.3126/jngs.v50i1.22851.

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The excavation of the long blind shaft is one of the most difficult and risky in Nepal Himalaya for hydropower development. Excavation of the shaft greater than 200 m length is a challenge due to vertical or inclined orientation, limited space, available technology and changing geological conditions. Amongst Alimak raise climber, shaft sinking and raise boring excavation methods, Alimak raise climber is most commonly used in Nepal. Selection of excavation method depends on geological conditions, size, length of shaft, access and of course the cost. Pressure shaft of Jhimruk, Khimti I, Chilime, Kaligandagi, Kulekhani, Khani Khola, Upper Tamakoshi and other hydroelectric projects were excavated with the help of conventional Alimak raise climber method. Severe overbreak problems were faced in Khimti I hydropower project during construction of upper inclined pressure shaft whereas recently 214 m vertical pressure shaft of Upper Tamakoshi and 280 m vertical pressure shaft of Khani Khola hydroelectric projects in Dolakha have been constructed successfully. Raise boring method was tried in Upper Tamakoshi Project but could not succeed due to deviation of pilot hole and hence shaft sinking and Alimak raise climber were used.

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29

Frangakis, T. J. "A review of lashing methods used in shaft sinking." Journal of the Southern African Institute of Mining and Metallurgy 118, no. 3 (2018): 297–308. http://dx.doi.org/10.17159/2411-9717/2018/v118n3a12.

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30

Gong-bo, Zhou, Zhu Zhen-cai, Wang Ying, Sun Xiao-dong, and Zi Bin. "Sinking-hoists synchronous balance control system in vertical shaft." Procedia Earth and Planetary Science 1, no. 1 (September 2009): 1503–12. http://dx.doi.org/10.1016/j.proeps.2009.09.232.

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31

Rejeb, A., and D. Bruel. "Hydromechanical effects of shaft sinking at the Sellafield site." International Journal of Rock Mechanics and Mining Sciences 38, no. 1 (January 2001): 17–29. http://dx.doi.org/10.1016/s1365-1609(00)00061-7.

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32

Levin, L. Yu, M. A. Semin, and O. S. Parshakov. "Mathematical Prediction of Frozen Wall Thickness in Shaft Sinking." Journal of Mining Science 53, no. 5 (September 2017): 938–44. http://dx.doi.org/10.1134/s1062739117052970.

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33

NAN, Marin-Silviu, Dorina BĂDIȚĂ POPESCU, Danut GRECEA, Cosmin VITAN, and Bogdan BRĂNIȘTEANU. "Research on Construction and Sizing of the Metal Structure of a Winding Installation." Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science 44, no. 2 (June 15, 2021): 11–16. http://dx.doi.org/10.35219/mms.2021.2.02.

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The paper focuses on the design of the metal tower for the sinking of Netiș de-ventilating shaft in Râul Mare Retezat hydro-energetic setup. The analytical calculation of sizing and verification of the metal structure is doubled by the graphic simulation with speciality software, in view of obtaining results as close as possible to the real exploitation conditions of the tower. The tower of the de-ventilating shaft is considered to be a temporary construction, and its component parts will be decommissioned once the sinking is finalized. The tower is made up of metal structures in four transoms, 3 being mounted with junction plates and screws, the fourth being the roof.

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34

Pershin, Vladimir, Aleksandr Kopytov, Fadeev Yuriy, and Wetti Ahmed. "Study of the Dynamic Loading Impact on the Design of Pentices when Sinking Vertical Mine Shafts." E3S Web of Conferences 41 (2018): 01016. http://dx.doi.org/10.1051/e3sconf/20184101016.

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Based on the reconstruction project for Gorno-Shorsky branch of JSC “Evrazruda” developed by JSC “Giproruda” to maintain the enterprise’s production capacity of 6 million tons per year, the shaft “Skipovoy” should be sunk from the level of 115 m to the level of 85 m. Due to the fact that the reconstruction period was to be shortened, the employees of LLC “SibGorComplex Engineering” together with the Underground and Mine Construction Department of T.F. Gorbachev Kuzbass State Technical University developed several variants of new design of wedge pentices for vertical mine shaft sinking under hoisting operations. The results of studies of the dynamic loading impact on the design of safety devices in skip shaft sinking are presented in the article. Based on the method of designing the force action essentials for the emergency skip dumping, the functions allowing determining the value of the impact on the main structural elements of pentices completely bridging over the shaft cross-section that can be used to substantiate the design parameters of new wedge pentices.

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35

Zhelnin, M. S., A. A. Kostina, O. A. Plekhov, and L. Y. Levin. "Numerical simulation of vertical shaft sinking using artificial ground freezing." E3S Web of Conferences 266 (2021): 03008. http://dx.doi.org/10.1051/e3sconf/202126603008.

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Artificial ground freezing (AGF) is used worldwide for vertical shaft sinking in difficult hydrogeological conditions. The modern tendency is to determine the design parameters of the freezing technique based on numerical simulation. This work is devoted to the numerical simulation of the formation of an ice-soil wall in the soil stratum due to the AGF and shaft sinking under the protection of the wall. For this purpose, a fully coupled thermo-hydro-mechanical model of soil freezing has been developed on the basis of the theory of poromechanics. The developed model considers important features of the freezing process, such as the phase change, pore water migration due to cryogenic suction, frost heave, and consolidation of the soil. The results have shown that the model allows to predict the distribution of ice content, assess stress and strain in the ice-soil wall, and estimate displacement of the excavation wall.

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36

Parshakov, O. S., L. Yu Levin, and M. A. Semin. "Thawing of rocks in shaft sinking with artificial ground freezing." Mining informational and analytical bulletin, no. 8 (2021): 51–69. http://dx.doi.org/10.25018/0236_1493_2021_8_0_51.

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37

Hakami, H. "Rock characterisation facility (RCF) shaft sinking — numerical computations using FLAC." International Journal of Rock Mechanics and Mining Sciences 38, no. 1 (January 2001): 59–65. http://dx.doi.org/10.1016/s1365-1609(00)00064-2.

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38

A., Kostina, Zhelnin M., Plekhov O., Panteleev I., and Levin L. "Creep behavior of ice-soil retaining structure during shaft sinking." Procedia Structural Integrity 13 (2018): 1273–78. http://dx.doi.org/10.1016/j.prostr.2018.12.260.

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39

Hutchinson, M. T., and G. P. Daw. "Combined grouting and depressurizing for water control during shaft sinking." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 27, no. 2 (April 1990): A127. http://dx.doi.org/10.1016/0148-9062(90)95371-7.

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40

Xu, Zhipeng, Xuhai Feng, Shengsheng Li, Liming Fan, and Changwu Liu. "Simultaneous Operations of Pregrouting and Shaft Drilling in Shaft Construction." Advances in Civil Engineering 2020 (December 5, 2020): 1–12. http://dx.doi.org/10.1155/2020/8529836.

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In shaft construction, conducting shaft drilling and pregrouting simultaneously is expected to speed up the sinking rate and save the cost. Reasonable determination of the spatial locations of the drilled shaft and grouting holes and proper defining of the start time of each construction work are the crucial techniques. To smoothly execute the simultaneous operations, the bedrock to be grouted is divided into two sections. The upper bedrock is injected first using straight grouting holes to act as a tight cover to protect shaft drilling. Then, the lower formations are grouted using S-shaped grouting holes, which are performed simultaneously with shaft drilling. The construction time of simultaneous operations of pregrouting for the lower bedrock using S-shaped holes and shaft drilling is the saved time. The main technical challenges include the stability of grouting holes and safety of shaft walls, as well as the disposal of the contaminative waste drilling mud. The stability of grouting holes which might affect by the shaft drilling-induced ground vibration could be evaluated according to the penetration of ground vibration caused by TBM tunnelling. If the grouting hole is in the range of ground vibration, protective measures including casing and ground improvement should be utilized to ensure the stability of grouting holes. The stability of unlined walls of the drilled shaft caused by the increased groundwater pressure can be achieved by a tight cover between the drilled shaft and pregrouting holes. The thickness of the cover is actually the length of the straight holes. The cover should have sufficient thickness and impermeability, which can considerably reduce or even completely stop the increased groundwater pressure in vicinity of the drilled shaft. The thickness and permeability of the cover could be determined using Maag’s solution for penetration of grouts in porous media. On the other hand, the waste drilling mud with proper modifications can be reutilized to prepare clay-cement-like grouts, which could provide an eco-friendly and cheap solution to harmlessly treat the huge volume of waste drilling mud. The properties of waste drilling mud and behaviors of grouts prepared using the waste mud should be experimentally investigated before reutilization, owing to uncertainties of geology in various cases. The construction time using the simultaneous operation method is just about 60% of that of the traditional excavation method, and the low value of measured residual water inflow shows the reliability of reusing the waste drilling mud as grouting materials. The proposed method could virtually improve the shaft sinking rate and save the construction cost. The principles developed for these technical challenges have been proved to be applicable in practices, which are believed to strongly support the applicability of this new method in other cases.

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Thamawong, Kridsada, and Werasak Raongjant. "Modelling and Stress Analysis of Shaft Work Subsidence of Underground Power Transmission Line Tunnel." Trends in Sciences 19, no. 17 (August 26, 2022): 5778. http://dx.doi.org/10.48048/tis.2022.5778.

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This research presents an analysis of soil subsidence around shaft work under its construction process and drilling tunnel by finite element method (FEM). The study is focused on the underground power transmission tunnel in the Chao Phraya River construction project (Southern Bangkok Station to Suksawat Road, Thailand) of the Metropolitan Electricity Authority. This research aims to provide information for designing shaft work and preventing drilling tunnel problems. The research analyzed the soil subsidence around shaft work with 12 m of inside diameter and 1 m of thickness that located 33 m underground during constructing a tunnel chimney by sinking method. It is assumed that the analyzed horizontal reaction is the net resistance of the lateral earth pressure around the shaft work. This study found that the subsidence of soil around shaft work during the construction and drilling process had the value between 0.80 - 53.30 mm. In the part of the base slab, the soil subsidence value is between 3.40 - 16.00 mm. It can be concluded that the top of shaft work during the construction and drilling process had a soil subsidence value of 53.30 mm with dmax/H ratio of 0.00162. HIGHLIGHTS The Metropolitan Electricity Authority has an underground power transmission tunnel in the Chao Phraya River Construction (Southern Bangkok Station to Suksawat Road, Thailand) project which used to distribute electricity from the source station to the other side of the Chao Phraya River This research studied the behavior of the shaft work in sinking reinforced concrete shaft work and drilling tunnel process by finite element method (FEM) with the Midas Gen 2021 program The analysis results of the maximum soil subsidence around the shaft work wall occurred in the top area (very soft to medium stiff clay layer) GRAPHICAL ABSTRACT

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Cao, Maoyong, Xiaoan Si, Hui Zhang, Fengying Ma, Peng Ji, and Hui Yao. "Calibration of Ultrasonic Transducer Based on Ultrasonic Logging Instrument for Shaft Sinking." Sensors 22, no. 18 (September 11, 2022): 6867. http://dx.doi.org/10.3390/s22186867.

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High-precision logging equipment is critical for measuring the borehole diameter and drilling offset in coal mining and petroleum drilling. We propose a module composition and positioning principle for an ultrasonic transducer based on an ultrasonic logging instrument for shaft sinking by drilling (ULISSD) for calculating the reflection distance. The logging distance, which is the primary performance index of a logging system, is determined by using the self-reception sensitivity and error of the ultrasonic transducer in a downhole system. To measure the error between the piezoelectric element of the transducer and the rubber seal of the borehole logging system, we developed an ultrasonic-transducer error-calibration device and a calibration method for a central-air-return-shaft-drilling project. This calibration device can eliminate the inherent error of the transducer and calculate the rate of propagation with high accuracy. The measurement error is reduced by approximately 1.5 mm; thus, the ULISSD measurement accuracy can be effectively improved in central-air-return-shaft drilling.

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43

Qixiang, Yin, Zhao Weiping, Xin Wen, Yang Hailin, and Zhang Linglei. "Simulation Analysis and Experimental Study on the Working State of Sinking Headframe in the Large Underground Shaft." Advances in Civil Engineering 2021 (May 17, 2021): 1–11. http://dx.doi.org/10.1155/2021/5513954.

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Based on the newly developed sinking headframe for the deep and large shaft, the finite element model of the full-scale headframe was established by using SAP2000. Through the calculation, the theoretical stress of the headframe at sinking depths of 40 m, 143 m, 223 m, 518 m, 762 m, 1000 m, 1250 m, and 1503 m was obtained and then compared with the field measured stress. The results show that with the increase of shaft sinking depth, the theoretical stress of finite element simulation and the field measured stress of each member of the sheave wheel platform and the headframe increase linearly, and for the maximum member stress in the upper, middle, and lower layers of the headframe, the numerical simulation value is greater than the field measured value and less than the designed steel strength. In other words, under normal working conditions, headframe members are in the elastic stress stage and meet the design requirements, and instability failure of headframe members will not occur. The end-restraint mode of the supporting bars has a great influence on the force of the top member. The reasonable selection of the restraint mode in the simulation is the key to the accuracy of the calculation results. The simulation results well reflect the actual stress of the headframe and provide a reliable guarantee for the follow-up work of the project.

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Balek, A. E., I. L. Ozornin, and A. N. Kayumova. "Joint analysis of rock mass stress state and elasticity modulus during shaft sinking." Mining informational and analytical bulletin, no. 3-1 (March 20, 2020): 21–36. http://dx.doi.org/10.25018/0236-1493-2020-31-0-21-36.

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The article presents an innovative procedure for the joint stress-strain and elasticity modulus analysis in high-strength rock masses with spacing from a few to tens meters. The procedure includes measurement of elastic convergence of rock walls due to deeper penetration of the foot of a vertical shaft and the analysis of measured displacements of check points along the shaft cross-section perimeter with subsequent two-stage solution of an inverse geomechanical problem. In the first stage, in the lobed diagram of measured displacements of check points, the azimuths of axes of the principal horizontal stresses in surrounding rock mass are determined. In the second stage, the process of deeper penetration of the shaft foot is modeled with different scenarios of the rock mass stress-strain behavior set as varied principal horizontal stresses at the known azimuths of their main axes. Then, the model and in-situ measurement results are compared using the analysis of variance ANOVA. The wanted variant of the stress-strain behavior and the associated modulus of elasticity, such that deviation of the actually measured displacements of check points from the model values is minimal, is identified by the extremum analysis of the experimental diagrams. The procedure was successfully tested in Vspomogatelny and Skipovoi vertical shafts of the Tenth Anniversary of Independence of Kazakhstan mine within Donskoy Mining and Processing Plant, in qualitatively different geological conditions: high-strength rock mass areas categorized as unstable and stable. In unstable rocks, the measured elasticity modulus Е = 3,5 ± 0,7 GPa made 6 %-16 % of the elasticity modulus in samples. In the stable rock mass, the measured modulus Е = 36,6 ± 7,7 GPa almost coincided with the elastic modulus of samples.

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45

Jiang, Hao Liang. "Introduction of Vertical Mine Shaft Sinking by Full Section Boring Method." Advanced Materials Research 446-449 (January 2012): 3706–9. http://dx.doi.org/10.4028/scientific5/amr.446-449.3706.

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46

杜, 健民. "Large Diameter Deep Shaft Sinking Headframe Selection and Structure Optimization Research." Mine Engineering 03, no. 03 (2015): 118–27. http://dx.doi.org/10.12677/me.2015.33017.

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47

Yang, Chunlai, and Zongmin Wang. "Surface Pre-grouting and Freezing for Shaft Sinking in Aquifer Formations." Mine Water and the Environment 24, no. 4 (December 2005): 209–12. http://dx.doi.org/10.1007/s10230-005-0097-8.

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48

Nipitsch, Gernot, and Wolfgang Pacher. "The Fröschnitzgraben contract - Challenges in shaft sinking, construction logistics and landfill." Geomechanics and Tunnelling 10, no. 6 (November 28, 2017): 678–85. http://dx.doi.org/10.1002/geot.201700053.

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49

Yao, Zhishu, Mingkai Liu, Xiaojian Wang, Bin Tang, and Weipei Xue. "Deflection Mechanism and Treatment Technology of Permanent Derrick of Freeze Sinking on Deep Alluvium." Advances in Civil Engineering 2019 (February 3, 2019): 1–10. http://dx.doi.org/10.1155/2019/1362628.

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Aiming at the problems of deflection and operation safety of permanent derrick of freeze sinking shafts, the mechanism analysis of uneven settling of the derrick foundations in frost-thawed soil was conducted. In addition, research on ground stabilization and derrick deviation rectification technologies was also studied in this paper based on the engineering practice of derrick of auxiliary shaft in the Dingji Coal Mine. Firstly, since the soil texture and artificial freeze temperature field are uneven, the bearing capacity and compression modulus of soil mass decrease after freeze thawing, resulting in uneven settlement of the foundation soil of the derrick footing and causing the deflection of the derrick. The finite element numerical analysis indicates that, in the event of uneven settling, the greatest tensile stress in the derrick structure of Dingji auxiliary shaft increased by 39.83% and the largest pressure stress increased by 33.33%. Secondly, this study used sleeve valve pipe single-fluid static pressure grouting technology to reinforce the foundation of the derrick footing. The reinforced depth of grouting is 32 m, and every derrick foundation has adopted three circles of grouting holes for grouting reinforcement. Meanwhile, the hydraulic synchronous jacking system was used to rectify the deviation of the derrick, restoring the centre line of derrick ascension to the original design state. Finally, the practice of grouting, foundation consolidation, and derrick deviation rectification projects of the Dingji auxiliary shaft suggest that, after grouting reinforcement, the rate of foundation settlement is gradually decreased and tends to be stable. This has resulted in uniform settlement, and through four basic jacking, the deflection of the derrick has been corrected to its initial design state.

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Li, Dong Wei, Ju Hong Fan, and Ren He Wang. "Triaxial Low-Temperature Creep Tests of Artificially Frozen Soil." Applied Mechanics and Materials 71-78 (July 2011): 3775–78. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3775.

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With the increasing in freezing shaft sinking depth of the mine，Mine permanent derrick was located into the frozen wall. The internal force distribution of the shaft-tower foundation was obtained by field measurement shaft-tower foundation basal pressure, foundation reinforced strain and the strain of concrete and foundation deformation of mechanical quantity. The numerical simulation of the interaction between coal derrick and foundation in freezing and thawing process shows that: the field measurement and numerical simulation laws were consistent and the values were in good agreement. It has very important theoretical and practical significance for the safe production of derrick and future derrick foundation design in freezing method construction.

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