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Journal articles on the topic 'Hydraulic mining'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Abduazizov, N. A., Zh B. Toshov, and A. Sh Zhuraev. "THE RESEARCH OF "HYDROBANK-COOLER" SYSTEMS OF HYDRAULIC POWER UNITS OF HYDRAULIC MINING MACHINES." EurasianUnionScientists 4, no. 2(71) (2020): 4–8. http://dx.doi.org/10.31618/esu.2413-9335.2020.4.71.598.

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Today, powerful expensive equipment is used in mining enterprises. Downtime, breakdowns and repairs of hydraulic mining machines lead to large financial losses of mining enterprises. Mechanical particles, microdroplets of water and air bubbles that fall into hydraulic fluids during operation, significantly affect the properties of the working fluid. In this regard, maintaining the quality of the working fluid used in expensive hydraulic mining machines is one of the most important tasks of modern hydraulics.

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2

Zhang, Wei, Dong Sheng Zhang, and Yong Shu Zhao. "Stability Analysis of Hydraulic Support in Large Inclined and High Mining Height Coalface." Applied Mechanics and Materials 101-102 (September 2011): 1105–8. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.1105.

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Under the condition of large inclined angle, the stability control of hydraulic support was always the challenge for the fully-mechanized mining in large inclined coal seams. Based on the specific geological conditions of 509 coalface with large inclined and high mining in Gaozhuang mine, the model of hydraulic support had been drawn by using SolidWorks software, and the inclination mechanical model of hydraulic support had been established to analyze its inclination stability along coalface. The calculation result shows that when the maximum inclination angle is 31° and the underhand angle is

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3

Rochev, Vikror. "Hydraulic borehole mining method possible application at Middle Larba alluvial gold field." E3S Web of Conferences 56 (2018): 01025. http://dx.doi.org/10.1051/e3sconf/20185601025.

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Gold on placer deposits is mainly extracted in two ways: open and underground. But the open method of mining has a great negative impact on the environment, and the mine method is characterized by high labor intensity, capital and operating costs. As an alternative to these methods of development of alluvial gold, the hydraulic borehole mining method can be used. The use of a well as a hydro-mining creates favorable opportunities for ensuring nature protection and safe operation. When applying the method, the well does not have hydraulic extractions: stripping, this allows preserving the cultu

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4

Lu, Haifeng, Nan Shan, You-Kuan Zhang, and Xiuyu Liang. "Effect of Strain-Dependent Hydraulic Conductivity of Coal Rock on Groundwater Inrush in Mining." Geofluids 2020 (December 23, 2020): 1–15. http://dx.doi.org/10.1155/2020/8887392.

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Hydraulic conductivity is an important parameter for predicting groundwater inrush in coal mining worksites. Hydraulic conductivity varies with deformation and failure of rocks induced by mining. Understanding the evolution pattern of hydraulic conductivity during mining is important for accurately predicting groundwater inrush. In this study, variations of hydraulic conductivity of rock samples during rock deformation and failure were measured using the triaxial servo rock mechanic test in a laboratory. The exponential formula of hydraulic conductivity-volume strain was proposed based on the

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5

Adach-Pawelus, Karolina, and Daniel Pawelus. "Application of Hydraulic Backfill for Rockburst Prevention in the Mining Field with Remnant in the Polish Underground Copper Mines." Energies 14, no. 13 (2021): 3869. http://dx.doi.org/10.3390/en14133869.

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In the polish underground copper mines owned by KGHM Polska Miedz S.A, various types of room and pillar mining systems are used, mainly with roof deflection, but also with dry and hydraulic backfill. One of the basic problems associated with the exploitation of copper deposits is rockburst hazard. Aa high level of rockburst hazard is caused by mining the ore at great depth in difficult geological and mining conditions, among others, in the vicinity of remnants. The main goal of this study is to investigate how hydraulic backfill improves the geomechanical situation in the mining filed and redu

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6

Huang, Qing Qing, and Qiu Jie Zhang. "Analysis on the Stability of Hydraulic Support in Great Tilt Angle Mining Face." Applied Mechanics and Materials 556-562 (May 2014): 519–22. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.519.

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The hydraulic support is mainly used in roadway and workplace for supporting and protecting in mining industry. The hydraulic support would appear the situation of declining, dumping and crowding on greater tilt angle mining face, these will threat the safety of the workplace, the safety of mining face is the key to the safety in production. This paper analyzes the reasons of declining, dumping in static force, gives respectively the angle range of working surface hydraulic support declining and dumping, proposes some relevant measures of the hydraulic support declining and dumping.

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7

Sha, Yong Bai, Xiao Ying Zhao, Liang Fei Li, and Yan He. "Research of Experiment Platform for Drilling Hydraulic Mining of Oil Shale." Advanced Materials Research 562-564 (August 2012): 789–92. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.789.

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Aimed at a new mining method of oil shale—Borehole Hydraulic Mining, the experiment platform for Borehole Hydraulic mining of oil shale is designed based on this, in order to evaluation of the effective damage to oil shale in different forms of jet, determine the economic and reasonable high-pressure jet parameters. The finite element analysis is conducted to the key components of the experimental platform. The Results Show that the parts design is reasonable and the experiment platform meets the requirements. The experimental platform provides the reliable equipment guarantee for the effectiv

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8

Li, Zhi. "Overview of the faults and diagnosis methods of the hydraulic system of modern coal mining machines." E3S Web of Conferences 528 (2024): 02019. http://dx.doi.org/10.1051/e3sconf/202452802019.

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The high power, high efficiency, low failure rate, and intelligence of coal mining equipment are important directions for the development of coal mining machines both domestically and internationally. The implementation of efficient and low failure coal mine equipment is an important prerequisite for ensuring the smooth deployment of intelligent mines. At present, coal mining equipment generally consists of three parts: mechanical, electrical, and hydraulic. However, hydraulic pressure is a necessary system for coal mining equipment to complete high-power and intelligent operations. This artic

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9

Tang, Shan Shan, and Chao Kun Wei. "Design of Monitoring System for Hydraulic Support Based on LabVIEW." Advanced Materials Research 989-994 (July 2014): 2758–60. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2758.

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Hydraulic support is widely used under the mine while the pressure is the most important factors of its safety.In view of the defects about present pressure monitor of mining hydraulic support ,designing a mining hydraulic support pressure monitoring system based on LabVIEW.This article mainly introducing the overall structure of the system, hydraulic system principle, the LabVIEW program, data communication and interface design.Using LabVIEW collection and storage support’s real-time pressure information. On the basis of the single chip microcomputer and the LabVIEW for data processing and di

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10

Evmenova, Galina, and Sergey Evmenov. "Slurry Water Regeneration after Hydraulic Mining." E3S Web of Conferences 41 (2018): 01019. http://dx.doi.org/10.1051/e3sconf/20184101019.

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Treatment and clarification of coal-day suspensions involve of whole range of technological processes, the efficiency of which depends significantly on the concentration of finely dispersed coal in the water-coal suspension. The behavior of flocculation of coal and clay suspensions with high molecular weight substances making possible to forecast the efficiency of polymer action while controlling the electrokinetic properties and aggregate stability of disperse systems has been studied. Aggregation of fine dispersal particles leads to the acceleration of their sedimentation and intensifies tec

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11

Liu, Boying, Xiaoxiang Wang, Xiuzhan Zhang, Jiancheng Liu, Liangwan Rong, and Yong Ma. "Research Status of Deep-Sea Polymetallic Nodule Collection Technology." Journal of Marine Science and Engineering 12, no. 5 (2024): 744. http://dx.doi.org/10.3390/jmse12050744.

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The bottom of the ocean is rich in mineral resources, and deep-sea mining has been a research hotspot in recent years. As a key part of deep-sea mining operation, polymetallic nodule collection technology has been researched in many countries around the world. The distribution of deep-sea polymetallic nodule mining areas and the characteristics of nodules are summarized, which provides a reference for the study of collection technology and the optimization of pick-up device structure. In order to further establish a deep-sea mining collection technology system, the current development status o

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12

Akanova, G., A. Sadkowski, S. Podbolotov, A. Kolga, and I. Stolpovskikh. "Ways to reduce hydraulic losses in multistage centrifugal pumping equipment for mining and oil-producing industries." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 77–84. http://dx.doi.org/10.33271/nvngu/2021-6/077.

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Purpose. To study hydraulic losses in pumping units during pumping and transportation of liquids, to develop the design and technology solutions to improve the energy efficiency of centrifugal pumps in the mining and oil-producing industries. Methodology. In the theoretical and experimental analysis of hydraulic losses during the transportation of liquids, the hydraulics and experimental analysis methods were used. Findings. As a result of the research carried out, a new design scheme of a multistage centrifugal pump has been developed, providing a coaxial arrangement of impellers, which allow

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13

Shi, Hengbo, Jiacheng Xie, Xuewen Wang, Juanli Li, and Xing Ge. "An operation optimization method of a fully mechanized coal mining face based on semi-physical virtual simulation." International Journal of Coal Science & Technology 7, no. 1 (2019): 147–63. http://dx.doi.org/10.1007/s40789-019-00282-3.

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AbstractA mathematical hydraulic support self-tracking model for three-machine cooperative mining is proposed to address low efficiency and difficulties in strategy evaluation of a fully mechanized coal face. The proposed model uses the coordinates and traction speed of the shearer to calculate the frequency of the circular hydraulic support and realize the coordinated operation of the three-machine mining technology. A unity3d hardware-in-the-loop simulation experimental hearer and hydraulic support platform was used to validate the model of autonomous follow-up. The results indicate that col

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14

Hu, Min. "Research and Analysis on the Retrofit Design of Caving Coal Hydraulic Support." Advanced Materials Research 912-914 (April 2014): 915–18. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.915.

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The low caving coal hydraulic support can be transformed into standing shield hydraulic support which is mining full height in order to adapt to the change of mining conditions. On the basis of the analysis of the key elements of retrofit design, transformation practice of specific type of hydraulic support is carried out. The result shows that retrofit design is effective and has an important practical value .

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15

Cheng, Qingying, Bingxiang Huang, Luying Shao, et al. "Combination of Pre-Pulse and Constant Pumping Rate Hydraulic Fracturing for Weakening Hard Coal and Rock Mass." Energies 13, no. 21 (2020): 5534. http://dx.doi.org/10.3390/en13215534.

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The weakening of hard coal–rock mass is the core common problem that is involved in the top coal weakening in hard and thick coal seams, the hard roof control during the initial mining stage in the longwall mining face, and the hanging roof control in the gob of non-coal mine. Based on the characteristics of pulse hydraulic fracturing and constant pumping rate hydraulic fracturing, a weakening method for hard coal–rock mass by combining pre-pulse and constant pumping rate hydraulic fracturing is proposed. A complete set of equipment for the combined pulse and constant pumping rate hydraulic fr

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16

Wang, Li Ping, Xiao Wei Shao, Chun Yan Qiu, and Wei Min Huang. "Structure Design of the Hydraulic Support Sprag Units for Great Mining Height." Advanced Materials Research 744 (August 2013): 118–20. http://dx.doi.org/10.4028/www.scientific.net/amr.744.118.

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In this paper,the importance of controlling side fall in great mining height coal face is introduced,and the stability of great mining height coal seam,the types and characteristics of sprag units are researched. Through the study this paper designs and confirms the sprag units structure which is fit for the great mining height hydraulic supports well. Hydraulic support sprag unit structure mainly have two types: simple aticulated type and four-bar linkage type.By the analysis and comparision of the characteristic of retractable type and folding type, the folding sprag units which has better i

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17

Li, Ran, Wenshu Wei, Yuehua Lai, Dalong Wang, Bo Liu, and Tongcheng Wang. "Long-distance intelligent liquid supply for coal mining faces based on liquid demand prediction." Journal of Physics: Conference Series 2561, no. 1 (2023): 012018. http://dx.doi.org/10.1088/1742-6596/2561/1/012018.

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Abstract The coal mine pump station liquid supply system adapts to changes in the main pressure for supply, but under conditions of long-distance liquid supply beyond 2000 m, there is a problem with the difficult system response to the hydraulic support liquid demand, resulting in significant pressure fluctuations in the hydraulic system and serious performance degradation of the supply system. To solve this problem, a long-distance intelligent liquid supply method based on liquid demand prediction for coal mining faces is proposed to ensure stable liquid supply. The method integrates paramete

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18

Zhang, Jiayong, Yongzhen Niu, Jian Chen, Yanlei Guo, and Liwen Guo. "Research on Deep Coalbed Methane Localized Spotting and Efficient Permeability Enhancement Technology." Applied Sciences 12, no. 22 (2022): 11843. http://dx.doi.org/10.3390/app122211843.

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To solve the bottleneck problem of low deep coal seam permeability and difficult coalbed methane (CBM) mining. Combining hydraulic splitting technology and directional drilling technology, a directional hydraulic splitting enhancement method of deep CBM mining was proposed. The selection equation for the directional hydraulic splitting of deep coalbed was constructed. The numerical simulation reveals the variation in coal fractures around different split angles. The split angle under the maximum coal damage effect was obtained. It was found that the combined effect of the double crack damage d

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19

Cao, Chao, Kai Gao, Hao Wang, et al. "Hydraulic Support Liquid Supply System Adaptive Pump Controlled Pressure Stabilization Control Under Strong Time-Varying Load." Processes 12, no. 12 (2024): 2774. https://doi.org/10.3390/pr12122774.

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The hydraulic support liquid supply system provided power for the hydraulic support, serving as the core to ensure safe support of the coal mining face and to maintain continuous, efficient, and stable advancement of the coal mining operations. The hydraulic support faced complex loads while operating on the fully mechanized mining face. To meet the requirement of rapidly following the coal mining machine’s movement, numerous actuators of the hydraulic support frequently performed sequential actions, and the liquid demand of the hydraulic support varied strongly over time, causing the hydrauli

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20

Xu, Zhi Peng, Kui Zhang, and Ri Ji. "Design of Electric-Hydraulic Control System for Hydraulic Powered Support in Fully Mechanized Mining Face." Advanced Materials Research 753-755 (August 2013): 2641–44. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2641.

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The constraint relation of three-key-equipment, including coal cutter, scraper conveyor and hydraulic support, applied in the safe, high-producing and high-efficient fully mechanized mining face, was introduced; the composition principle of electro-hydraulic control system, embedded in the hydraulic support, was discussed, and the design scheme of the composition and hardware system about the electro-hydraulic control unit was presented in this paper. And finally the scheme achieved the target that we can control and monitor the working condition in near real-time, on the ground, in the crossh

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21

Bilen, Branislav, Branka Bilen-Katic, and Marko Zerjal. "Some Naval Architectural Problems in Underwater Coal Mining." Marine Technology and SNAME News 31, no. 02 (1994): 116–22. http://dx.doi.org/10.5957/mt1.1994.31.2.116.

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This paper presents a solution for a propulsion system that provides perfect speed control and maneuverability for a survey launch used in the process of underwater coal mining. First, mining aspects of coal exploitation are explained. There is also a brief technical description of a cutting wheel suction dredger, including specifications for dredging equipment. The important role of the survey launch in underwater mining procedures is outlined and technical specifications of an installed indirect diesel-hydraulic drive are given. A qualitative comparison between the diesel-hydraulic and the o

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22

KRAVTSOV, Alexey Aleksandrovich, Yuriy Vitalievich DMITRAK, and Victor Arkadievitch ATRUSHKEVICH. "EXPERIENCE OF UNDERGROUND HYDRAULIC MINING IN USSR AND RUSSIA." Mine Surveying and Subsurface Use, no. 3 (2024): 18–23. http://dx.doi.org/10.56195/20793332_2023_3_18_23.

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The article provides an analysis of the mining and geological conditions and the experience of coal mines in the USSR and Russia, in which hydraulic mining technology was used. The applied technical solutions and technological schemes of mining are also considered. The preferred mining and geological conditions for the use of hydrotechnology have been determined. Promising areas of hydro extraction research have been identified, such as the development of efficient underground dehydration complexes and automation of basic technological processes. The results of the research can be useful for f

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23

Xie, Chang Hong. "Application of Crossing Borehole Hydraulic Fracturing in Coal Mine." Advanced Materials Research 634-638 (January 2013): 3282–88. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3282.

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In order to solve technical problems which restricted coal mining operation, such as low penetrability of coal mass and low efficiency of gas extraction, according to geological mining condition of Yuyang Mine, Crossing Borehole Hydraulic Fracturing system was designed and investigated in N3704 west gas tunnel (below). The system was based on coal or rock mass hydraulic fracturing theory and gas flow theory. Through the experimental study of fracture and analysis of fracturing effect after inspection, the result of field test shows that Crossing Borehole Hydraulic Fracturing system could impro

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24

Makharadze, Leon. "Device for Protection Against Hydraulic Shocks of Multi-Stage Pressure Hydraulic Transport Systems." Works of Georgian Technical University, no. 1(527) (March 21, 2023): 109–17. http://dx.doi.org/10.36073/1512-0996-2023-1-109-117.

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Pipeline hydrotransport systems began to develop rapidly from the second half of the last century. This was especially the case in the mining and mineral industries, when it was used for hydraulic transportation of loose solid materials. One of the fragments of the fundamental works performed by the author at G. Tsulukidze Mining Institute – the construction performance and working principle of the hydraulic shock protection device of multistage pressure hydraulic transport systems – is reviewed. The construction includes a pneumohydraulic accumulator, the body of which is connected to the suc

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25

Lu, Ming Xin, Ming Feng Lv, Ju Guang Wang, et al. "Intelligence Mining with Electro-Hydraulic Control Technology." Advanced Materials Research 201-203 (February 2011): 425–28. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.425.

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The underlying way to reduce accidents is reducing the number of workers on the coal face. Automatic mining can realize this object. The key for unmanned automatic mining is the application of electro-hydraulic control technology used on workface support. The electro-hydraulic control system applied in Wannian colliery has following function: Automatic moving , lowering and rising of support, monitoring and display of roof pressure; Shearer locating, controlling of cutting height and shearer speed, remote operation and procedure running; Automatic tension of conveyor chain, conveyor operation

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26

Spude, Robert L., and Powell Greenland. "Hydraulic Mining in California: A Tarnished Legacy." Western Historical Quarterly 33, no. 3 (2002): 366. http://dx.doi.org/10.2307/4144860.

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27

Sato, K., T. Isobe, N. Mori, and T. Goto. "9. Microseismic activity associated with hydraulic mining." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 23, no. 1 (1986): 85–94. http://dx.doi.org/10.1016/0148-9062(86)91669-4.

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28

Aleksey, Kholmskii. "The prospects of blastless ore breaking with hydraulic hammers when mining North Uralian Bauxite Mine deposits by underground method." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 4 (August 21, 2022): 26–37. http://dx.doi.org/10.21440/0536-1028-2022-4-26-37.

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Research objective is to increase mining productivity at the North Uralian Bauxite Basin deposits by switching to blastless mining technology with ore breaking with hydraulic hammers. Methods of research include the analysis of current process flow schemes for the North Uralian bauxite basin deposits development, a comparative analysis of the stoping schedules in process flow schemes with drilling and blasting ore breaking and blastless breaking of the mine block reserves, determining the productivity of blastless ore breaking with hydraulic hammers, and studying the dependence between the pro

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29

Peng, Tian Hao, Mei Sheng Yang, Xiao Song Hao, and Jia Dong Liu. "Simulation Study on Load-Sensing Hydraulic Drawing System of Coal Mining Machine." Applied Mechanics and Materials 37-38 (November 2010): 1195–98. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.1195.

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A new hydraulic drawing system of coal mining machine is proposed in this paper. The variable plunger pump adopted in the hydraulic drawing system of coal mining machine is replaced by load-sensing variable displacement pump. The working principle and energy-saving of the new system are introduced. The performance of the new system is obtained by the simulation study using AMESim.

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30

Li, Hai Ning, and Dai An Deng. "Research on Influence Factors of Hydraulic Support Moving Velocity in Coal Mining Based on AMESim." Advanced Materials Research 1014 (July 2014): 180–84. http://dx.doi.org/10.4028/www.scientific.net/amr.1014.180.

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In view of the high efficiency modernization coal demand, in this paper, the hydraulic support moving velocity influence factors were studied. Building simulation model of the thrust jack of hydraulic support with the simulation software AMESim, and run the simulation. Comparing the simulation results by setting different parameters value. It is concluded that the rated flow of pump station and hydraulic controlled check valve opening quantity will affect the speed of hydraulic support moving frame. This result provides reference for the optimal design of hydraulic support and improving the ef

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31

Semenenko, Yevhen, Olha Medvedieva, Larysa Tatarko, Zariana Halchenko, Vadym Simes, and Saifilmalik Myrzakhmetov. "Substantiation of the possibility of determining the parameters of the hydrotransported material based on operational measurements." Geo-Technical Mechanics, no. 169 (2024): 126–39. https://doi.org/10.15407/geotm2024.169.126.

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The purpose of the publication is to create methodological foundations for determining the critical hydraulic transport speed by the values of hydraulic slope, flow rate and density of the hydraulic compoud and to assess, on the basis of these data, the current characteristics of the hydraulic compoud solid phase particles. To achieve this goal, the following research methods were used: generalisation of the known methods for calculating hydraulic transport parameters and mathematical processing of data obtained from the data of the services of mechanics, power engineering, control of measurin

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32

Kosenko, Andrii, and Viktor Tarasyutin. "SUBSTANTIATION OF RATIONAL TECHNOLOGIES FOR CARRYING OUT PREPARATORY-THROWED RAIS IN THE MINING BLOCKS OF IRON MINES, WHICH ENSURE INCREASED STABILITY OF THE MASSIF EXPOSURES." JOURNAL of Donetsk Mining Institute, no. 1 (2022): 40–46. http://dx.doi.org/10.31474/1999-981x-2022-1-40-46.

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Purpose. Improving the efficiency and safety of mining operations in the process of preparatory-rifled risers, through the use of rational technological schemes of borehole hydraulic technology. Methods. Analysis of literary sources, design documentation and practice of developing mineral deposits by underground method. Designing a technological scheme for borehole hydraulic technology for preparatory-rifled risers. Technical and economic comparison of the developed technological schemes for conducting preparatory-rifled risers. Results. The results of the study were proposals for improving an

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33

KORYAKIN, Artem Aleksandrovich. "SUBSTANTIATION OF THE PARAMETERS OF THE TECHNOLOGY OF PURIFICATION OF SILO ACCUMULATORS OF COAL-PROCESSING PLANTS BY HYDRAULIC ELEVATOR DREDGERS." Mine Surveying and Subsurface Use, no. 4 (2023): 30–35. http://dx.doi.org/10.56195/20793332_2023_4_30_35.

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A methodological approach has been developed to determine the conditions that ensure the stable and safe operation of a hydraulic elevator dredger during the development of enrichment tailings. The conditions of stable and safe operation of a hydraulic elevator dredger during the development of enrichment tailings are determined. An algorithm has been developed for calculating the hydraulic transport system, performance and the main parameters of this technology, depending on the mining conditions of the complex. The productivity and the area of use of the UGB-2M hydraulic elevator dredger in

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34

Strelnikov, Andrew, Sergey Markov, Ludger Rattmann, and Dieter Weber. "Theoretical Features of Rope Shovels and Hydraulic Backhoes Using at Open Pit Mines." E3S Web of Conferences 41 (2018): 01003. http://dx.doi.org/10.1051/e3sconf/20184101003.

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Open coal mining companies in Kuzbass (Western Siberia, Russia) constantly face challenges to increase the economic efficiency of mining operations, reduce coal losses and increase profitability. One of the ways to increase the efficiency of open pit mining is to improve the technology for the development of coal-bearing zones of quarry fields on complex structured inclined and steep deposits. At present, the projects for promising deposits have been completed, and a number of operating open pits conduct the development of coal-bearing zones along their entire width by horizontal layers. The e

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35

Abduaziziv, Nabijon Azamatovich Zhuraev Akbar Shavkatovich Sayfiev Javohir G'iyoz o'g'li Ismatov Adham alibek o`g`li. "RELIABILITY ANALYSIS OF THE MAIN COMPONENTS OF HYDRAULIC SYSTEMS OF MINING MACHINES." International Journal of Education, Social Science & Humanities. Finland Academic Research Science Publishers 11, no. 4 (2023): 2118–22. https://doi.org/10.5281/zenodo.7884979.

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Analysis of conditions and operating modes of hydraulic systems of mining machines shows that hydraulic units operate under stressful conditions characterized by constantly changing operating pressure, temperature conditions, pressure build-up rate, occurrence of hydraulic shocks and cyclic loads. This increases the probability of failure of hydraulic system components and can lead to failures, causing loss of working fluid. These circumstances make the task of developing effective schemes for protecting the hydraulic system from the release of working fluid when destroying high-pressure hoses

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36

Supriyadi, Supriyadi, Mardiah Mardiah, and Abrianto Akuan. "Optimalisasi Perencanaan Tambang Berdasarkan Pemilihan Kebutuhan Alat Berat Untuk Mencapai Target Produksi di Tambang Besar (TB 2.2) Tempilang Front 1 Kec. Tempilang Mitra PT Timah (Persero) Tbk." MINERAL 2, no. 2 (2020): 108–15. http://dx.doi.org/10.33019/mineral.v2i2.1566.

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Mining activities in TB 2.2 TempilangSite was conducted by Bahtera Sarindo Utama as a partner of PT Timah (Persero) Tbk.The method and technology used in mining site was Mechanical Mine as an alternative of conventional open pit mining which had been applied to overcome a great lack of hydraulic mining. There were several problems occurred in tin mining activities of TB 2.2 Tempilang included less of cycle time of gravel pump per day due to several problems that appeared in mine site such as gravel pump were often broken, Front Work landslides, so the production activity was inefficient. Mine

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Zhang, Qiang, Peitao Shi, Meng Li, Tingcheng Zong, and Weijian Song. "A Design Method and Application of Backfilling Hydraulic Supports in Reforming Top-Coal Caving Hydraulic Supports." Applied Sciences 13, no. 2 (2023): 987. http://dx.doi.org/10.3390/app13020987.

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Solid backfilling is an environmentally friendly method of coal mining. Backfilling hydraulic supports are important devices in solid backfill mining. In order to speed up the design and manufacturing process of them, this paper proposes a method of hydraulic support reformation and evaluation. The mechanical models of top-coal caving hydraulic support and backfilling hydraulic support were established to analyze the stress characteristics of the main structure. ABAQUS was used to establish the 3D numerical model to analyze the load-bearing characteristics, as well as verify the strength requi

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Wu, Wenda, Guorui Feng, Xiuxiu Yu, Jianbiao Bai, Xiangyu Wang, and Xiangzhuo Zhao. "Investigation into Pressure Appearances and Hydraulic Fracturing Roof-Cutting Technology in Mining Working Face under Residual Pillars: A Case Study." Energies 16, no. 9 (2023): 3914. http://dx.doi.org/10.3390/en16093914.

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Strong mining pressure disasters are prone to happen when the mining working face is under residual pillars (MWFRPs). The purpose of this study was to experimentally investigate and evaluate pressure manifestations and hydraulic fracture roof-cutting technology in the development of a working face under residual pillars using a physical model and numerical modelling tools. A scheme for hydraulic fracturing cutting technology was proposed and carried out on-site at the 31106 working face. The results show that the instability of the overlying residual pillar causes the upper thick, hard strata

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Zong, Tingcheng, Gaolei Zhu, Qiang Zhang, et al. "Solid Backfilling Efficiency Optimization in Coal Mining: Spatiotemporal Linkage Analysis and Case Study." Applied Sciences 13, no. 22 (2023): 12298. http://dx.doi.org/10.3390/app132212298.

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In coal mining, solid backfilling technology is widely used. However, its efficiency is seriously hindered by the following two factors. Firstly, the process flow of the solid backfilling operation is more complicated in the back, and the spatiotemporal linkage (SPL) between actions of the cylinders powering each support and between hydraulic supports in the whole face lacks continuity. Secondly, the coal mining process in the front has a higher level of intelligence and technical maturity than the backfilling operation in the back, the latter permanently staying behind the former. To this end

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Li, Cong, Xiangang Yin, Jing Xie, and Gaoyou Peng. "The characteristics of mining induced stress fluctuations in broken rock mass over one kilometer deep coal mine." Thermal Science 23, Suppl. 3 (2019): 843–51. http://dx.doi.org/10.2298/tsci180621119l.

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Mine pressure is critical to the safety of working face. Evaluating the working resistance accurately of the stope hydraulic supports is one of the most effective and direct ways to reflect the overall stress characteristics of the roof and the defor?mation, movement and destruction of overlying strata. Due to the complex breaking form of the roof, the working resistance of the hydraulic supports at different positions of the mining face varies in different ways. One can obtain the pressure of hydraulic support system by pressure monitoring and analyze its fractal characteristics. Through spec

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Zhao, Si Hai, Yu Wei Hu, Zhe Qian Zhao, Yan Chen Guo, Ji Ye Gao, and Peng Chao Zhong. "The Application of RFID at Leasing Management of Coal Mining Equipments." Advanced Materials Research 774-776 (September 2013): 1647–52. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1647.

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Giving each hydraulic prop sets of the only equipment number is a problem of the management of coal mining equipments, the article has presented a method of using RFID technology to affix with a electronic tag for each hydraulic prop, through theoretical analysis and experimental research, basing on the equipment identification and identification distance reliability, confirm that the low frequency RFID electronic tags can be used as a hydraulic prop, and design the installation method of the hydraulic prop RFID chip. The paper also uses the C language compiled a RFID chips identification and

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Li, Haojie, Benben Liu, Qingyuan He, et al. "Improving Hard Rock Materials Cuttability by Hydraulic Fracturing at Mining Working Face." Applied Sciences 14, no. 24 (2024): 11908. https://doi.org/10.3390/app142411908.

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During advancing the working face at Guojiawan Coal Mine, hard rock faults are encountered, which hinder the normal cutting of the shearer. Hydraulic fracturing is applied to pretreat the hard rock materials. Un-directional hydraulic fracturing experiments in transparent gelatin samples are carried out. The influence of the differential stress, the borehole dip angle on the initiation and propagation of un-directional hydraulic fractures (HFs) are investigated. Three field test schemes of hydraulic fracturing are proposed and implemented at the 51207 working face of Guojiawan Coal Mine. Compar

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Kutepov, Yuriy, Aleksandr Mironov, Maksim Sablin, and Elena Borger. "Substantiation of Safe Conditions During Undermining of Hydraulic Waste Disposal." E3S Web of Conferences 41 (2018): 01007. http://dx.doi.org/10.1051/e3sconf/20184101007.

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This article considers mining and geological conditions of the site “Blagodatny” of the mine named after A.D. Ruban located underneaththe old open pit coal mine and the hydraulic-mine dump. The potentially dangerous zones in the undermined rock mass have been identified based onthe conditions of formation of water inflow into mine workings. Safe depthof coal seams mining has been calculated depending on the type of water body – the hydraulic-mine dump.

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Li, Tengda, Jiren Wang, Kun Zhang, and Chunhua Zhang. "Mechanical analysis of the structure of longwall mining hydraulic support." Science Progress 103, no. 3 (2020): 003685042093647. http://dx.doi.org/10.1177/0036850420936479.

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Existing studies of the structural strength of longwall mining hydraulic support are mainly focused on the force acting on individual supports instead of the general mechanical characteristics of the support group in a fully mechanized coal seam working face. This study combines theoretical analyses and experiments to investigate the mechanical characteristics of a longwall mining hydraulic support group and the stiffness of key support components under different working conditions. The theory of a beam on an elastic foundation was applied to construct a mechanical model for the hydraulic supp

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Valerii, Mirenkov. "Hydraulic fracture in the nonlinear stress field." Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal, no. 4 (June 25, 2020): 12–20. http://dx.doi.org/10.21440/0536-1028-2020-4-12-20.

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Introduction. The article considers a variant of a straight finite fracture modeled by a mathematical cut in the elastic plane. Aim. The new model proposed differs from the existing models by the damage zone bounded by the elastic material at the fracture tip up to the moment of the fracture growth. The process of fracturing is essentially nonlinear. Methodology. The model is based on the full-scale tension experiments with a reference sample of rocks enclosing a fracture and having the characteristic stress points, namely, proportionality limit, elasticity limit, plasticity domain and the dom

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Burakov, A. M., S. V. Panishev, E. L. Alkova, and D. V. Khosoev. "Experience of using hydraulic excavators in difficult mining, geological and climatic conditions." Mining Industry Journal (Gornay Promishlennost), no. 2/2022 (May 6, 2022): 90–96. http://dx.doi.org/10.30686/1609-9192-2022-2-90-96.

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The article summarizes the experience of using hydraulic excavators in coal, diamondiferous and other mining operations. It is noted that the excavation capacity of modern hydraulic excavators is several times higher than that of the mechanical shovels, and the hydraulic equipment is more suitable for non-explosive excavation in hard grounds, including halfrock formations. It is shown that even in difficult mining, geological and climatic conditions in coal, diamondiferous and other mines, the use of hydraulic excavators in Russian mining companies is justified by high efficiency and high avai

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Han, Meng, and Lei Xie. "A Multi-Body Kinetics Intelligent Simulation Based Design Method for Hydraulic Support." Advanced Materials Research 753-755 (August 2013): 876–79. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.876.

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Hydraulic support is important supporting equipment in fully mechanized coal mining. Its working performance and efficiency have relatively big effect for the efficiency of coal mining. Aiming at the characteristics of dynamic requirements, parametric design and simulation analysis of the hydraulic support, a multi-body kinetics based hydraulic support intelligent simulation design and analysis method is proposed. The three dimensional model of the support is set up with Solidworks, and then the 3D modeling is converted to ADAMS software for motion simulation. Some key components in the model

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Ye, Tie Li, and Jiao Peng. "Finite Element Analysis of Large Mining Height Hydraulic Support Top Beam." Applied Mechanics and Materials 740 (March 2015): 104–7. http://dx.doi.org/10.4028/www.scientific.net/amm.740.104.

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In this paper, Solid works software and finite element analysis software ANSYS workbench combined for ZY10000/26/55 type two columns shield large mining height hydraulic support top beam finite element modeling, through the mathematical model analysis to determine the mechanical load, and then using ANSYS software to analyze the stress and displacement law by three conditions: both ends of the beam in concentrated load, unilateral loads and torsional loads. In this way, we know the stress and displacement of hydraulic support beam after the distribution of load, for stress concentration, which

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Cheng, Yuxiang, and Yanjun Zhang. "Experimental Study of Fracture Propagation: The Application in Energy Mining." Energies 13, no. 6 (2020): 1411. http://dx.doi.org/10.3390/en13061411.

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Hydraulic fracturing has been widely used in recent years as a key technology to improve energy mining efficiency in petroleum and geothermal industries. Laboratory hydraulic fracturing experiments recently were completed in six large-scale 300 × 300 × 300 mm rock specimens to better understand this complex process of hydraulic fracturing. When injection flow rate increases from 5 to 30 mL/min. The fracture initiation pressures and breakdown pressures increase, the propagation times and post-fracturing pressures decrease. The fracture geometries are observed and analyzed, mean injection power

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Zhang, Xin, Jian Wu Zhang, Qing Liang Zeng, and Cheng Long Wang. "Lightweight Design for Hydraulic Support." Key Engineering Materials 450 (November 2010): 79–82. http://dx.doi.org/10.4028/www.scientific.net/kem.450.79.

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In large inclined angle mining condition, in order to decrease the effect of sliding force, a lightweight design for hydraulic support is presented in this paper. Taking minimum mass of top beam as optimization objective, the three-dimensional model of it is built firstly. The whole top beam is simplified into top plate, side plate, bottom plate and main reinforcement on the premise of unchanging its topology configuration, and only strength constraint is chosen as constraint, which reduces the number of constraint functions and calculation cycles. By means of ANSYS zero-order optimization mod

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