Results 61 to 70 of about 6,281 (245)
Advance in Civil Engineering, 2021 The study of the effects of mining height on overlying strata movement and underground pressure characteristics during extremely thick coal seam fully mechanized sublevel caving mining is very important for choosing the reasonable mining height and the ...
Yongkang Yang, Jie Wei, Chenlong Wang
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Geofluids, 2021 The overrunning disaster of harmful gas tends to occur in the working face in thick coal seam with high gas concentration, as the fully mechanized caving stope has the characteristics of high mining intensity, high remnant coal, and high gas content. Therefore, the disastrous mechanism and concentration distribution of gas migration in fully mechanized
Li Chong, He Sifeng, Xu Zhijun
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Research and application of intelligent caving technology in fully mechanized working face
Gong-kuang zidonghua, 2021 The traditional top coal caving control mainly relies on manual coal caving control, which uses single-round of sequential coal caving. The working face equipped with electro-hydraulic control system mainly adopts the two-round sequential coal caving ...
WU Tong, YU Rui, LIU Qing, WEI Wenyan
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Evaluation of coal longwall caving characteristics using an innovative UDEC Trigon approach [PDF]
, 2016 Author version of article. The version of record is available from the publisher via DOI: 1016/j.compgeo.2013.09.020Copyright © 2013 Elsevier Ltd. All rights reserved.The paper presents an innovative numerical approach to simulate progressive caving of ...
Coggan, John, Gao, Fuqiang, Stead, Doug
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Overlying rock movement and mining pressure in a fully mechanized caving face with a large dip angle
Frontiers in Earth Science, 2022 The overlying rock movement and mining pressure in the fully mechanized caving face with a large dip angle were systematically investigated according to theoretical analysis, similar material simulation, numerical calculation, and field monitoring.
Ying Chen +9 more
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Safe Effective Key Mining Technologies of Fully Mechanized Caving Face in Steeply Dipping Seam [PDF]
Proceedings of the 2015 3rd International Conference on Management Science, Education Technology, Arts, Social Science and Economics, 2015 Floor failure and slipping, rib spalling, toppling and slanting of supports and gliding of equipment in the panel generally exist during the top coal caving of steeply inclined thick seam. Technologies of fast moving, zone controlling of surrounding rock and equipment’s stability controlling were put forward through theoretical analysis and field ...
Zhan-bo Cheng, Xiao-meng Li
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Evolution of mining‐induced stress in fully mechanized top‐coal caving under high horizontal stress [PDF]
Energy Science & Engineering, 2020 AbstractIn fully mechanized top‐coal caving (FMTC), the effects of coal caving are closely related to the degree of damage to the top‐coal which is determined by the stress state therein. Therefore, research into the evolution of mining‐induced stress field is key to understanding failure mechanisms of top‐coal.
Yuming Huo +4 more
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Shock and Vibration, 2021 Due to the change of ground stress environment caused by underground coal mining, the intense lateral mining stress concentration is formed around the stope; so section coal pillar is generally set up to bear the mining pressure, but the different sizes ...
Qingwei Bu, M. Tu, B. Fu
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Применение бесконсольных крепей механизированных комплексов при отработке пологих пластов [PDF]
, 2016 Purpose. Substantiation of applying additional load-bearing structure of powered support near the face onto the bench formed within the seam by the cutter-loader actuating element, which allows to increase efficiency of coal winning.
Busylo, V, Savelieva, T, Serdyuk, V
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Overall requirements for an advanced underground coal extraction system [PDF]
, 1980 Underground mining systems suitable for coal seams expoitable in the year 2000 are examined with particular relevance to the resources of Central Appalachia. Requirements for such systems may be summarized as follows: (1) production cost; (2)miner safety;
Goldsmith, M., Lavin, M. L.
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