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Articoli di riviste sul tema "Contour massif"

Autore: Grafiati

Pubblicato: 7 giugno 2025

Ultima modifica: 2 agosto 2025

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1

Kravets, Viktor, Nataliia Remez, Andrii Kovtun, and Azer Shukiurov. "Explosive wave propagation in the presence of antiseismic protective curtain." E3S Web of Conferences 60 (2018): 00011. http://dx.doi.org/10.1051/e3sconf/20186000011.

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The objective of this work is to study theoretically the stress wave formation in the borehole-to-borehole space and on the boundary with the borehole contour set by creating a directed fracture system in it. The features of an interaction of the weak stress wave at a large-scale blasting in the short-delay blast mode (SDB) with the massif and the protective contour set of boreholes, are considered. It is noted the effect of the contour set parameters on wave processes. The constructive solutions are proposed in order to reduce the dynamic loadings in the peripheral rock massif. The proposals

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2

Botokanova, B. A., and G. S. Isaeva. "Stress-strain state of rock massifs around tunnels located in a dip-layered massif." Mine Surveying and Subsurface Use, no. 6 (2024): 12–18. https://doi.org/10.56195/20793332_2024_6_12_18.

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The article presents the results of a research on the stress-strain state of rock massifs around tunnels located in a dip-layered massif. As a result of the research, the authors developed a technique for determining stress fields around workings associated with the impact of water pressure in an anisotropic massif. The study was conducted using Muskhelishvili’s method, which made it possible to calculate the components of stresses and relative deformations with account of the relief, gravitational and tectonic forces, as well as the hydrostatic pressure of water. The results show that the dis

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3

Chacksfield, B. C., W. De Vos, L. D'Hooge, et al. "A new look at Belgian aeromagnetic and gravity data through image-based display and integrated modelling techniques." Geological Magazine 130, no. 5 (1993): 583–91. http://dx.doi.org/10.1017/s0016756800020884.

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AbstractDigital processing and image-based display techniques have been used to generate contour and shaded-relief maps of Belgian aeromagnetic data at a scale of 1:300000 for the whole of Belgium. These highlight the important anomalies and structural trends, particularly over the Brabant Massif. North and vertically illuminated shaded-relief plots, enhanced structural belts trending west–east to northwest–southeast in the Brabant Massif and west–east to southwest–northeast in the core of the Ardennes. The principal magnetic lineaments have been identified from the shaded-relief plots and ten

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4

Sachko, Roman, Viktor Levit, and Julia Strelnik. "THE MODERN STATE OF CAPITAL MOUNTAIN MAKING AND SUGGESTION IS IN RELATION TO SUPPORT AND INCREASE OF THEIR FIRMNESS ON PJSC «SHU «POKROVSKE»." SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”, no. 1(27)-2(28)2022 (2022): 36–45. http://dx.doi.org/10.31474/2073-9575-2022-1(27)-2(28)-36-45.

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Purpose. Development and ground of rational parameters and energyeffective technologies of realization, method of guard and support of making are with the increase of depth of bedding. Methods. Further study of conformities to law of deformation of containing heterogeneous pedigree array and exposure of conformities to law of dynamics of the tensely-deformed state of containing array of making at the use of new methods of support or well-known with the changed parameters in certain geological terms on the basis of visual inspection and instrumental measuring of the mountain making at not in on

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5

Petrakov, A. A., M. A. Petrakova, and M. D. Panasyuk. "Study of the Geotechnical Methods of the Structure Tilts Elimination." Modern Trends in Construction, Urban and Territorial Planning 2, no. 4 (2023): 34–45. http://dx.doi.org/10.23947/2949-1835-2023-2-4-34-45.

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Introduction. Nowadays, in the frame of development of the new territories, when building the industrial and business facilities, there arises the need to develop the territories having the so-called complicated engineering-geological and mining-geological conditions. Ensuring the normal operation of the buildings and structures built on the territories of the land slide hazard, subsiding soils and on the underworked territories is the problem which is relevant to solve.Materials and Methods. The parameters of the new geotechnical method of the structure tilts elimination by digging a deep tre

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6

Kutuev, Vyacheslav, and Sergey Zharikov. "Limitations on seismic effects of technological explosions in the combined development of the Sarbai deposit." E3S Web of Conferences 177 (2020): 01007. http://dx.doi.org/10.1051/e3sconf/202017701007.

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The issue of joint production of drilling-and-blasting operations (DBO) is acute in the combined field workings with the condition of underground mining in the edge massif of the pit walls. Normally, the underground mine construction begins with the quarry depth approaching the end marks. In this situation, even if there is any volume for wall cutback, it is very insignificant and blasting works come closely to the limit circuit of the quarry, behind which the protected massif is located and underground workings is supposed to be carried out in the future. The main task in carrying out DBO und

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7

Khalikova, E. R., V. F. Diomin, R. A. Mussin, A. P. Krakovsky, and U. Zh Khanafin. "Monitoring of the stress-strain state during preparatory workings." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 328, no. 1 (2023): 68–75. http://dx.doi.org/10.31643/2024/6445.08.

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Maintaining and increasing the volume of underground coal mining is possible only if there is a highly efficient technology for conducting and maintaining preparatory workings. The purpose of the research was to assess the parameters of stability control of the contours of the mine workings, anchored with anchorage, to create a technology for intensive and safe excavation of mine workings based on the identified patterns of behavior of adjacent rock massifs. The idea of the approach is to use a man-made stress-strain state to develop an effective technology for fixing a contour rock mass. The

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8

Bayalieva, Zh, and B. Zhumabaev. "CHANGES IN THE STRESS STATE OF A MOUNTAIN SLOPE WITH A Ledge UNDER THE ACTION OF AN EXTERNAL LOAD WITH A DECREASING TRIANGULAR EPUR." TRANSBAIKAL STATE UNIVERSITY JOURNAL 28, no. 9 (2022): 6–15. http://dx.doi.org/10.21209/2227-9245-2022-28-9-6-15.

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The Kyrgyz Republic covers an area of – 198,5 thousand km2. Mountains and mountain slopes occupy more than 94 % of the country. For this reason, in mountainous areas, mountain slopes are used for conducting various types of human economic activity ledges at different heights of the mountain slope, from hundreds of meters to 4–5 km. The object of the study is the ledges of the mountain slope, which are necessary for economic activity, located at different heights of the slope. The subject of the study is the initial and changed stress-strain state of the massif near the scarp of the mountain sl

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9

Морозов, B. H., B. H. Татаринов, and И. Ю. Буров. "PREDICTING OF POTENTIAL PROPAGATION CHANNELS FOR ECOLOGICALLY HARMFUL SUBSTANCES IN GEOLOGIC MEDIA." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (June 20, 2001): 102. http://dx.doi.org/10.17770/etr2001vol1.1970.

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The questions o f assessment and prédiction of potential charnels o f infiltration of radionuclides in géologie environment are discussed. This is specially important for underground allocation of the nuclear objects. The method of allows for spatial-temporal variations in a geological massif at ail hierarchical levels from régional tectonic processes up top peri-contour zones of chambers.

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10

Soatov, Bekzod Shokir o'g'li, Shahboz Xolmamat o'g'li Rajabov, and To'lqin Meyli o'g'li Meyliyev. "KARER BORTLARINING TURG'UNLIGINI SHAKLLANTIRISHDA HIMOYA BO'SHLIG'INI OLISH USULINI ISHLAB CHIQISH." Educational Research in Universal Sciences 2, no. 1 (2023): 297–301. https://doi.org/10.5281/zenodo.7608094.

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To date, significant progress has been made in the application of contour blasting when cutting ledges in quarries. However, a number of key issues on the forecast assessment and selection of a rational technology for cutting ledges, as well as improving the parameters of borehole explosive charges during contour blasting, have not been resolved. At the same time, when choosing the parameters of drilling and blasting operations, the requirements of the stability of the sides of quarries are not sufficiently taken into account. In this regard, there is a need to carry out scientific research on

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11

Uzaqov, Navruz Choriyor o'g'li, та Shaxboz Baxtiyor o'g'li Radjabov. "NASOSNI BURCHAK TEZLIGI O'ZGARISHIDA ISHCHI PARAMETRLARNI НISOBLASH". Innovative Development in Educational Activities 2, № 9 (2023): 164–69. https://doi.org/10.5281/zenodo.7939263.

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<em>To date, significant progress has been made in the application of contour blasting when cutting ledges in quarries. However, a number of key issues on the forecast assessment and selection of a rational technology for cutting ledges, as well as improving the parameters of borehole explosive charges during contour blasting, have not been resolved. At the same time, when choosing the parameters of drilling and blasting operations, the requirements of the stability of the sides of quarries are not sufficiently taken into account. In this regard, there is a need to carry out scientific researc

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12

Nikitina, Anastasiya, Dmitriy Borzykh, Sergey Rib, Aleksandra Lesnykh, and Tonglin Zhao. "Numerical modeling of the stress-strain state of peripheral massif in the vicinity of mine workings." E3S Web of Conferences 330 (2021): 01009. http://dx.doi.org/10.1051/e3sconf/202133001009.

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In the process of numerical studies, the stress-strain state of the rock massif around the mine working driven at a depth of 600 m was determined. The article presents the analysis of the distribution of total vertical and horizontal stresses isolines in the working roof, as well as the ratio of the residual strength of rocks to the initial. The influence of the roof bolting on the displacement of working contour was established. Dangerous zones in the near-contour rocks of preparatory working were identified. The maximum exposure area of unsecured part of the roof during driving the workings

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13

Kostenko, Oleksii, Simonova Yuliia, and Volodymyr Gogo. "FEATURES OF DEFORMATION OF MINING PRODUCTS IN THE AREA OF INFLUENCE OF BROKEN WORKING." JOURNAL of Donetsk mining institute 54, no. 1 (2024): 43–49. http://dx.doi.org/10.31474/1999-981x-2024-1-43-49.

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Purpose. Study of the features of deformation of preparatory products under the influence of broken working in the conditions of shallow layers of deep mines of Donbas. Research methods. In order to achieve the goal, the deformations of roll-back lines at different stages of their operation were experimentally investigated, the stability of rollback stretches on steep formations with different methods of their protection is evaluated. The influence of geomechanical processes in such a coal-bearing massif being developed and the deformation properties of protective structures of preparatory wor

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14

Imashev, Askar, Aibek Mussin, and Amoussou Coffi Adoko. "Investigating an Enhanced Contour Blasting Technique Considering Rock Mass Structural Properties." Applied Sciences 14, no. 23 (2024): 11461. https://doi.org/10.3390/app142311461.

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When excavating tunnels and underground openings with the drill-and-blast method, minimizing excavation overbreak is vital, as it reduces the costs associated with excavation stability, mucking, and rock support. Overbreak in excavations not only causes safety concerns but also increases the cost of construction and completion time. This paper proposes a contour blasting design in which the parameters are optimized based on the rock’s structural properties. Numerical modeling was used to identify the possible damage zones of rock with a change of the seismic load due to blasting. The results w

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15

V. Kupriy, Ye. Kulazhenko, and А. Gudkova. "SIMULATION OF JOINT WORK OF CONSTRUCTION MOUNTING HOLES AND SOILS WITH USING FINITE ELEMENT METHOD (FEM)." Bridges and tunnels: Theory, Research, Practice, no. 7 (April 16, 2016): 19–26. http://dx.doi.org/10.15802/bttrp2015/66698.

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Purpose. The aim of this article is a true display of teamwork of the pit protection fence and surrounding massif by means of the Lira software complex, which is based on the finite elements method. Methodology. To solve the problem of teamwork of the system «support surrounding massif» a numeral simulation of finite-element method (FEM) has been conducted, by the results of calculations have been carried out constructions of the pots and the dependences of deforming pit protection fence support elements by changing of the massif parameters. Findings. By the results of calculations have been e

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16

Mehtiyev, Rafail K. "Mathematical modeling of an elastoplastic problem for a fractured massif, underground workings." Nafta-Gaz 81, no. 2 (2025): 109–16. https://doi.org/10.18668/ng.2025.02.03.

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This article considers the problem of plane elastoplasticity of stress distribution in a rock mass weakened by a circular excavation. The components of stress, strain, and displacement in the elastic and inelastic field, as well as the dimensions and shape of the contour separating them, have been determined. The convergence of results between the analytical and numerical solutions of the problem is evaluated. The complexity of elastoplastic problems lies in the fact that the shape and dimensions of the plastic zone are not known in advance and must be determined. The main advances in solving

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17

Demin, V. F., and R. K. Kamarov. "Developing Design Documentation and Producing Technological Supporting Tools for Contour Rock Massif." Material and Mechanical Engineering Technology 1, no. 1 (2021): 24–34. http://dx.doi.org/10.52209/2706-977x_2021_1_24.

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18

Shlyapin, A. V., F. S. Belousov, and F. M. Golubev. "The Study of Interrelation of Acoustic Properties and Results of Inclinometric Measurements of a Rock Massif in a Contour Drift." Occupational Safety in Industry, no. 2 (February 2025): 12–17. https://doi.org/10.24000/0409-2961-2025-2-12-17.

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In recent decades, the growing interest in combined methods of mineral deposit development has been observed, which allows for more efficient mineral extraction and reducing negative impacts on the environment. When designing and operating such enterprises, it is crucial to consider natural & geological, and mining conditions, as well as the interrelation between open and underground operations. The disregard and understudying of these factors can cause serious manmade disasters. A comprehensive example of complicated development conditions is the Mir kimberlite pipe, for which a combined

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19

Trofimov, V. A., A. V. Shlyapin, Yu А. Filippov, and F. S. Belousov. "The Forecast of Dynamics of Methane Release into a Longwell." Occupational Safety in Industry, no. 6 (June 2025): 42–48. https://doi.org/10.24000/0409-2961-2025-6-42-48.

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The study examines patterns of methane inflow into a degassing horizontal well that passes through a coal massif during its degassing process. The gas flow is formed due to the difference between the pressures in the massif and the pressure in the degassing system for gas extraction. A method to resolve the problem of methane filtration into an imperfect longwell (100m) passed through a homogeneous coal seam, where the supply contour cannot be isolated, has been proposed. To estimate the total gas flow rate and the efficient well operation time, a numerical algorithm in ANSYS that merges two t

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20

Sadovenko, I., V. Tymoshchuk, A. Zahrytsenko, and Y. Sherstiuk. "Quantitative assessment of groundwater resource storage capacity and geomechanical stability of a disturbed rock massif." Collection of Research Papers of the National Mining University 78 (September 2024): 78–89. https://doi.org/10.33271/crpnmu/78.078.

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Purpose. To assess the storage capacity of the mined out and flooded section of the mine field for hydrogeomechanical risk determination, prevention of water inflow emergencies and substantiation the engineering protection measures in influence zone of the water body. The methods. Predictive calculations were performed using the methods of numerical mathematical modeling of hydrodynamic and geomechanical processes implemented by the method of finite differences and finite elements. Simulation technique involves the solution of a series of inverse problems, which allows us to obtain high reliab

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21

Tiutkin, Oleksii, Nataliia Petrosian, Anatolii Radkevych, and Ahmad Alkhdour. "Regularities of stress state of unsupported working occurring in a layered massif." E3S Web of Conferences 109 (2019): 00100. http://dx.doi.org/10.1051/e3sconf/201910900100.

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The paper defines the regularities of stress state of unsupported working occurring in a layered massif. The relevance of the performed research is substantiated by the importance of determining the stresses of the contour of unsupported working when the elastic modulus of the matrix and the layer is varied. Since the application of analytic methods for this case is complex, we used a numerical finite element method, implemented in the SCAD. We developed a finite-element model of the above working, where the elastic moduli of the matrix and the layer varied greatly, while its position was unch

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22

Demin, V., D. Akhmatnurov, R. Mussin, and N. Zamaliev. "TECHNOLOGY OF GEOMECHANICAL PROCESS CONTROL TO INCREASE THE STABILITY OF THE CONTOUR MASSIF AROUND WORKINGS." Горный журнал Казахстана, no. 1(237) (January 31, 2025): 26–32. https://doi.org/10.48498/minmag.2025.237.1.006.

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The stress-strain state, manifestations of rock pressure, and conditions for maintaining workings depending on mining and technological parameters were studied. The studies allowed us to establish the degree of their infl uence on the effi ciency of using anchor support for mining workings. A method for managing geomechanical processes during mining operations at deep levels of coal mines was developed. The aim of the research is to create a technology for intensive and safe implementation of mining workings based on the identifi ed patterns of behavior of adjacent rock massifs, optimization o

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23

Kurnosov, Serhii, and Volodymyr Zerkal. "About trends of improvement of technological schemes for methane recovery from the rock-coal massif." E3S Web of Conferences 109 (2019): 00046. http://dx.doi.org/10.1051/e3sconf/201910900046.

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Purpose of the research was to improve efficiency of underground gas drainage from the rock-coal massif. It is substantiated that most promising solution of the problem of increasing efficiency of gas drainage from the massif is to mine additional gas-drainage road. This approach allows separating processes of coal mining and methane recovery in space and time. The Ukrainian normative documents is recommended to mine the road behind zones with high rock pressure. We found that in difficult conditions of coal seam mining, distance from road to working long wall would be more than 100 m. This di

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Lushpey, V. P., A. A. Fatkulin, V. D. Kulnev, N. A. Nikolaychuk, and S. S. Nikolaychuk. "Preliminary contour explosion in the conditions of the increased waterwater of the explosive massif." Mining informational and analytical bulletin 7, no. 23 (2019): 48–55. http://dx.doi.org/10.25018/0236-1493-2019-7-23-48-55.

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Gupalo, V. S., V. A. Pechatnikov, I. V. Shramko, P. V. Nikolenko, A. A. Chumakov, and G. D. Neuvazhaev. "Refining the Methods and Equipment Proposed for the Research During the Excavation of the Underground Research Laboratory." Radioactive Waste 30, no. 1 (2025): 88–97. https://doi.org/10.25283/2587-9707-2025-1-88-97.

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The article summarizes the key takeaways from the refinement of some individual research methods to be applied during the excavation of the underground research laboratory (URL). It discusses video logging, ultrasonic logging and interval injections in wells that were performed under the conditions of an analogous facility. These studies provided some “basic” initial data on the near-contour zone of the rock massif required for the long-term safety assessment of a radioactive waste (RW) disposal facility: areas of increased fissuring were identified, geometric parameters of cracks and their at

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Mavlyanov, A.A, T.E. Melnikova, and A. Milyutin. "Study of the impact of preliminary contour blasting on changing the zone of intensive rock crushing and reducing the level of watering of the massif in quarry." Multidisciplinary Journal of Science and Technology 5, no. 5 (2025): 376–79. https://doi.org/10.5281/zenodo.15382994.

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Sadovenko, I. O., A. M. Puhach, and N. I. Dereviahina. "Investigation of hydrogeomechanical parameters of loess massifs in conditions of technogenic underflooding and development of technical recommendations for strengthening of bases of foundations." Journal of Geology, Geography and Geoecology 28, no. 1 (2019): 173–79. http://dx.doi.org/10.15421/111918.

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Based on the analysis of actual data and the results of numerical modeling, dependencies of deformations of the investigated residential complex due to technogenic moistening of a loess massif of soils are investigated. It was established that a dynamics of subsidence of bench marks in time is closely correlated with a moistening mode. In order to form a picture of dynamics of development of moistening phases of the massif and a quantitative estimation of main factors of their formation, a numerical model of the loess massif was built, based on the finite element approximation of the section o

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Bautdinov, D. T., M. M. Djamaludinov, and K. S. Zhukova. "STRESSED CONDITION OF THE WRAPPING WITHOUT-DRIVE HYDROTECHNICAL TUNNEL OF THE CIRCULAR FORM, PROPOSED IN ANISOTROPIC ROCK GROUND." Herald of Dagestan State Technical University. Technical Sciences 45, no. 3 (2019): 155–64. http://dx.doi.org/10.21822/2073-6185-2018-45-3-155-164.

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Objectives. The aim of the study is a parametric analysis of the stress-free lining of a pressureless hydraulic tunnel of circular section, and adjacent anisotropic rock from its own weight of the ground medium at different ratios of the elastic characteristics of the ground medium in orthogonal directions using a transversely isotropic medium model.Method. The calculation of a large-length hydraulic tunnel laid in strong transversely isotropic rocky ground is reduced to the problem of plane deformation of the theory of elasticity for a transversely isotropic medium containing tunnel developme

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Fomychov, Vadym, Viktor Pochepov, Liudmyla Fomychova, and Viktor Lapko. "Rheology effect determination of the heterogeneous rock massif on the stress-strain state of the breakage face geomechanical system." E3S Web of Conferences 60 (2018): 00015. http://dx.doi.org/10.1051/e3sconf/20186000015.

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The purpose of this study is to determine the nature of influence of the rheological properties of the rocks on the results of computational experiments simulating the mine workings contour condition during the breakage face advance. To determine the deformations along the mine workings contour, the calculations have been made of the junction area between the preparatory and stope face mine workings by the finite element method for various parameters of the material models. These data provided the basis for analysis of the patterns development of the rheology modelling influence on the stress-

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Demin, V. F., S. B. Aliev, Kh A. Yussupov, V. N. Dolgonosov, V. S. Portnov, and S. G. Ozhigin. "IMPROVEMENT OF THE TECHNOLOGY OF ANCHORING OF THE CONTOUR MASSIF DURING MINING EXCAVATIONS IN COAL MINES." Ugol', no. 09 (September 8, 2022): 56–60. http://dx.doi.org/10.18796/0041-5790-2022-9-56-60.

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Palamarchuk, Tetiana, Liliia Prokhorets, and Volodymyr Amelin. "Analysis of technological developments for the maintenance of ore and uranium mines of Ukraine." Geo-Technical Mechanics, no. 168 (2024): 35–48. https://doi.org/10.15407/geotm2024.168.035.

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The purpose of this work is to establish the disadvantages and advantages of existing foreign and domestic technological developments for the maintenance of workings in iron ore and uranium mines and to determine the most promising ways to increase their reliability.The analysis of the existing technological developments for the maintenance of uranium and iron ore deposits workings made it possible to establish a variety of options for increasing the operational reliability of potentially dangerous areas. Taking into account these results and the peculiarities of the mining and geological cond

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Toderas, Mihaela. "Mathematical Model for Establishing the Time-Dependent Behavior of Rocks by the Gradient Method." Applied Sciences 12, no. 23 (2022): 11877. http://dx.doi.org/10.3390/app122311877.

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In the underground activity domain, most problems related to mining pressure and mining stability need to be solved by taking into account the time behavior of rocks through an approach of the interaction amidst the rock massif, support system, time through the elastic, viscous and plastic models, namely a rheological approach. In order to choose a rational support system, one needs to know the sustainment solicitation at different time intervals. The change in the sustainment in time is emphasized only in the analytical research in which the massif is studied and characterized in terms of the

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Doderović, Aleksandar, Nikola Stanić, Miljan Gomilanović, and Saša Stepanović. "System for water collection that gravities into the old bed of the river Čehotina." Mining and Metallurgy Engineering Bor, no. 1 (2023): 17–26. http://dx.doi.org/10.5937/mmeb2301017d.

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Functioning of the drainage system has a great importance for the efficient and continuous exploitation at the open pits. Modern exploitation is realized at the open pits with increasing depth and surface, so it is of a crucial importance to accept as much water as possible before it enters the open pit contour. By this way, the loading of a drainage system inside the open pit is greatly reduced, but it also prevents the negative effects of water on the massif. This paper, using the example of the open pit Potrlica, presents how the already existing system, which fully solves all problems in a

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Aliev, S. B., V. F. Demin, A. S. Кainazarov, and N. A. Miletenko. "EVALUATION OF THE STATE OF THE NEAR-CONTOUR MOUNTAIN MASSIF IN JOINT LAVA WITH THE ADJACENT EXCUTTING DEVELOPMENT." Ugol', no. 01 (January 8, 2023): 35–39. http://dx.doi.org/10.18796/0041-5790-2023-1-35-39.

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Merzlikin, Artem, Oleksandr Yaytsov, Olga Pidgurnaya, and Victor Nazimko. "RESEARCH OF DEFORMATIONS AND OPTIMIZATION OF PARAMETERS OF DEGASATION WELLS." JOURNAL of Donetsk mining institute, no. 2 (2020): 49–57. http://dx.doi.org/10.31474/1999-981x-2020-2-49-57.

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Abstract (sommario):

Purpose. Investigation of deformation of the mouth of the degassing well depending on the deformation of the rocks around the preparatory work Methodology. The deformation of the mouth of the degassing well as a function of deformations of the roof rocks of the preparatory workings from which the well was drilled is considered. The dependence of the required depth of well sealing on the level of methane leakage and roof deformation is established. Results. It is experimentally proved that in the zone of active shifts behind the operating lava, where the main amount of explosive methane is rele

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36

Ponte, Maurizio, Filippo Catanzariti, and Gloria Campilongo. "Application of the Finite Element Method (FEM) through GFAS Software to the study of a tunnel." Green World Journal 4, no. 2 (2021): 001. http://dx.doi.org/10.53313/gwj42006.

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Computational simulation is widely used in companies to perform analysis and improve the quality of products and projects. Most of these analyses are carried out using software that uses the Finite Element Method, which allows to obtain answers to numerous engineering problems. In this study, two examples of application to the study of tunnels of the Finite Element Method using the Geostru Software "GFAS - Geotechnical F.E.M. Analysis System" are proposed. The case of a tunnel excavated inside a granite rock massif was analyzed, first determining the state of stresses in the cavity contour thr

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37

SMOLIANIUK, N. V., and A. V. BILCHENKO. "NUMERICAL ANALYSIS OF A SINGLE-VAULT STATION OF THE SHALLOW CONTOUR INTERVAL OF THE KHARKIV METRO." Bridges and tunnels: Theory, Research, Practice, no. 25 (May 9, 2024): 109–18. http://dx.doi.org/10.15802/bttrp2024/303474.

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Purpose. The development of the Kharkiv metro is characterized by the development of new structures and technologies for their construction. The extensive metro system in the city of Kharkiv and the presence of deep and shallow underground stations require scientific substantiation of these complex underground objects. The method of the scientific article is the numerical analysis of a single-vaulted shallow contour interval station, the vault of which has a special design (perforated reinforced concrete blocks). Methodology. To achieve the goal, the design of the station with a prefabricated

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Sentyabov, Sergey, and Albert Zubkov. "Investigation of stress field parameters at deep horizons of the Gayskoye field**." E3S Web of Conferences 192 (2020): 01028. http://dx.doi.org/10.1051/e3sconf/202019201028.

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The extraction of solid minerals is associated with the penetration of man into the subsoil by creating either relatively simple or extremely complex structures. All mining operations can be safely and efficiently carried out only on the basis of calculating the stability of these structures, which is based on knowledge of the physical and mechanical properties, the stress state of the rock mass and the patterns of their redistribution and formation in mountain structures. The presented studies confirmed the regularities of the formation of natural stresses in the rock mass, which is the sum o

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Toderaș, Mihaela. "Finite Element Method for Designing Large Section Underground Works by Sequential Excavation Method. Study Case: Lugoj-Deva Road Tunnel." Mining Revue 28, no. 2 (2022): 1–15. http://dx.doi.org/10.2478/minrv-2022-0008.

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Abstract (sommario):

Abstract Any underground work requires the knowledge and application of appropriate techniques and technologies in all stages of implementation of such a project. An important problem in the design of underground works is the knowledge of the characteristics and behaviour of the massif in which the work will be carried out. It depends on the choice of the excavation solution appropriate to the existing real conditions, which will influence the duration of the work and the costs associated with it. The objective of this paper was to analyse and compare the total deformations of the contour of t

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Tyupin, V. N. "Prediction of the Ground Vibration Rate during Large-scale Explosions in the Underground Conditions." Occupational Safety in Industry, no. 6 (June 2021): 41–45. http://dx.doi.org/10.24000/0409-2961-2021-6-41-45.

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At present, to ensure seismic safety in massive explosions, the analytical dependence of the determination of the vibration velocity of M.A. Sadovsky rock mass is mainly used. This dependence is widely used in the creation of seismic-safe technologies for mineral deposits open-pit and underground mining. However, scientific research and production experience showed that the rate of oscillation depends on the energy parameters of the explosive, the diameter and length of its charges, the number of simultaneously exploded charges, the number of deceleration stages, the deceleration interval, etc

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41

Barsukov, S., А. Т. Batyrkhanova, and Vladimir Dyomin. "DETERMINING THE PATTERNS OF STABILITY OF MINE WORKINGS FOR CALCULATION ROOF BOLTING PARAMETERS." Geoengineering, no. 6 (November 30, 2021): 9–16. http://dx.doi.org/10.20535/2707-2096.6.2021.241795.

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Abstract (sommario):

Purpose. The published studies are aimed at determining the mechanism of deformation of the rocks of the contour around the workings in terms of the parameters of the emerging fracturing and their dependence on the indicators of the strength of the rocks and the depth of occurrence in the massif. The tasks of the study include the installation of fracture indicators, the determination of the parameters of the development of the deformation process around the working, including the effect of longwall mining and taking into account the possibility of reuse of the workings. Methodology. To

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Bombino, Giuseppe, Daniela D’Agostino, Pasquale A. Marziliano, et al. "A Nature-Based Approach Using Felled Burnt Logs to Enhance Forest Recovery Post-Fire and Reduce Erosion Phenomena in the Mediterranean Area." Land 13, no. 2 (2024): 236. http://dx.doi.org/10.3390/land13020236.

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The easy implementation of a nature-based solution (NBS) to address a prompt stabilisation of burnt areas may be crucial in the Mediterranean forest environment. A plot scale hydrological and ecological survey was conducted in a pine forest of the Aspromonte Massif (southern Italy) affected by a high fire severity in summer 2021. The hydrological response to 30 rainfall event groups is analysed by monitoring nine sloping plots distributed into three plot blocks (forested according to the pre-fire situation, burnt with randomly directed felled logs and burnt with manually felled logs redirected

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43

КAIUN, О. "IMPROVEMENT OF METHODS OF KEEPING THE STABILITY OF PREPARATORY WORKS TAKING INTO ACCOUNT THE DEFORMATION PROPERTIES OF PROTECTIVE CONSTRUCTIONS." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1 (2023): 81–90. http://dx.doi.org/10.31474/2415-7902-2023-1-81-90.

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Abstract (sommario):

Purpose. To evaluate the deformation properties of protective constructions of preparatory workings to maintain their stability in the excavation areas of coal mines with steep coal seams. Methodology. To achieve this goal, laboratory and field studies of the deformation properties of protective constructions have been performed. Results. It has been established that under uniaxial compression, under the action of a statistical external force, which manifests itself in the conditions of uniaxial compression and relative deformation of wood chocks within 0.1<λ<0.2, their stiffness decreas

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44

Chepiga, Daria, Vitalii Hnatiuk, and Olha Pidhurna. "ASSESSMENT OF STABILITY OF PREPARATORY MINE WORKINGS WITH CAST STRIP PROTECTION." JOURNAL of Donetsk mining institute 54, no. 1 (2024): 160–68. http://dx.doi.org/10.31474/1999-981x-2024-1-160-168.

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Abstract (sommario):

Purpose. To assess the stability of the preparatory mine workings with the method of protection with cast strips in order to ensure safe working conditions in the mining areas of the coal mine. Method. A comprehensive approach was used in the research, which included the analysis and generalisation of theoretical and experimental research on this problem, a mine experiment in the conditions of the Pokrovske Mining and Metallurgical Mining and Processing Plant, and the processing of experimental data. The results. As a result of the conducted research, an assessment of the stability of the prep

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BANNIKOV, D. O., V. P. KUPRII, and D. YU VOTCHENKO. "REGULARITIES OF THE LINING STRESS-STRAIN STATE DURING OF THE PYLON METRO STATION CONSTRUCTION." Bridges and tunnels: Theory, Research, Practice, no. 19 (July 27, 2021): 19–27. http://dx.doi.org/10.15802/bttrp2021/233871.

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Abstract (sommario):

Purpose. Perform numerical analysis of the station structure. Take into account in the process of mathematical modeling the process of construction of station tunnels of a three-vaulted station. Obtain the regularities of the stress-strain state of the linings, which is influenced by the processes of soil excavation and lining construction. Methodology. To achieve this goal, a series of numerical calculations of models of the deep contour interval metro pylon station was performed. Three finite-element models have been developed, which reflect the stages of construction of a three-vaulted pylo

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46

Stetjuha, V. "Efficiency of underground space use in harsh climatic conditions." TRANSBAIKAL STATE UNIVERSITY JOURNAL 28, no. 8 (2022): 6–17. http://dx.doi.org/10.21209/2227-9245-2022-28-2-6-17.

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Abstract (sommario):

The object of the study is rock masses with underground structures located in regions with a harsh climate. The subject of the study is the temperature in the rock mass in natural conditions and in the area where the structure is located, as well as the parameters of the energy efficiency of the underground facility. The purpose of the study is to determine the effect of thermal insulation and deepening of a structure from the surface on achieving the energy efficiency of underground facilities in regions with harsh climatic conditions. The tasks are to determine the temperature fields in the

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47

Pasqualon, N. G., K. N. S. Santos, A. E. Marsellos, and K. Kyriakopoulos. "IMPLICATIONS OF PETROGRAPHY AND GEOCHEMISTRY OF ATHINIOS METAMORPHIC UNITS USING PXRF AND GIS ANALYSES IN THERA (SANTORINI, GREECE)." Bulletin of the Geological Society of Greece 50, no. 4 (2017): 1980. http://dx.doi.org/10.12681/bgsg.11944.

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Abstract (sommario):

Santorini metamorphic basement is part of the metamorphic complex known as Cycladic Massif, which was formed during the subduction of the Mediterranean lithosphere underneath the Aegean microplate. The two main components of the exposed basement are a complex of low-grade schists and phyllites, which are well exposed in Athinios harbour and overlaid by the crystalline limestones exposed in Mount Profitis Ilias and Mount Mesa Vouno. The Eocene and Miocene metamorphic units present evidence of dynamic metamorphism, and possibly are influenced by a granitic intrusion in Miocene. In this study, a

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RADCHENKO, Dmitry Nikolaevich, Roman Vladimirovich BERGER, Valentin Igorevich TATARNIKOV, and Pavel Olegovich ZUBKOV. "EXPERIMENTAL STUDY OF THE NATURE AND CONSEQUENCES OF INTERACTION OF SALT ROCKS WITH HYDROFILLING BRINES DURING UNDERGROUND DEVELOPMENT OF POTASSIUM SALT DEPOSITS." Mine Surveying and Subsurface Use, no. 6 (2023): 60–67. http://dx.doi.org/10.56195/20793332_2023_6_60_67.

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Abstract (sommario):

Introduction. The research methodology included selection and comparative tests of strength characteristics of the initial core of sylvinite and carnallite in air-dry condition and, respectively, core samples after their contact with model hydrofilling brines. During the tests on the press under uniaxial compression load it was noted that most of the samples are very heterogeneous, characterized by layering and the presence of various inclusions, varying even within the same well. The specimens differ in the character of deformation at compression failure. It seems that the character of contac

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49

Igor, Iordanov, Novikova Yuliia, Simonova Yuliia, et al. "Determining stability conditions for haulage drifts protected by coal pillars." Eastern-European Journal of Enterprise Technologies 6, no. 1(108) (2020): 72–81. https://doi.org/10.15587/1729-4061.2020.216530.

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Abstract (sommario):

The aim of this research is to study the stability of haulage drifts and the manifestations of rock pressure in them lengthwise the working area when protecting them with coal pillars. To assess the stability of workings, field experiments were conducted to study the manifestations of rock pressure in the haulage drifts of a steep coal seam. It has been registered that as the breakage face progresses, the displacement of roof rocks on the contour of the drift linearly increases with an increase in the length of the working area. The deformation properties of coal pillars were studied taking in

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50

Tsivka, Yevhenii. "Determination of the type of arched carbon fiber reinforced fastening of the preparatory opening for the conditions of the «Dniprovska» mine in weakly metamorphized rocks." Technology audit and production reserves 3, no. 1(77) (2024): 35–40. http://dx.doi.org/10.15587/2706-5448.2024.306879.

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Abstract (sommario):

The object of study is an arched carbon fiber-reinforced support of constant cross-section in a layered massif of weakly metamorphosed rocks. The article presents an analysis of the possible use of arched fiber-reinforced support of constant cross-section in a layered massif of weakly metamorphosed rocks for the conditions of the «Dniprovska» mine (Ukraine) around the preparatory opening. An analysis of the stability of mine openings in Western Donbas mines has shown that it is necessary to modernize the support system by introducing carbon fiber. The main reason for the low stability of the o

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