Results 31 to 40 of about 3,852 (269)
Patterns of overburden failure and ground fissure development of thick loose layer and thin bedrock [PDF]
矿业科学学报Studies on mining-induced overburden rock movement, damage and surface deformation cracks are essential to the safety production of coal mines and mining damage protection. Taking the 12203 working face of a mine of Zhengzhou Coal Group as an example, this study analyzed the evolution mechanism of overburden rock affected by mining via theoretical ...
GUO Wenbing +5 more
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Measurement of overburden failure zones in close-multiple coal seams mining
International Journal of Mining Science and Technology, 2021 In the Kaiping Coal field, mining of five coal seams, located within 80 m in the Kailuan Group, #5, #7, #8, #9 and #12 coal seam, is difficult due to small interburden thickness, concentrated stress distributions, high coal seam metamorphism, and complex geological conditions.
Yang Li +5 more
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Study on Overlying Strata Movement in Mining Adjacent Working Face of Extra Thick Seam
Meikuang Anquan, 2020 In order to master the movement law of overlying strata after coal mining in adjacent working faces, FLAC finite element software was used to simulate the sequential mining of adjacent working faces in a mine, and the stress, displacement and plastic ...
LAI Xingping, LI Junwei, CUI Feng, SHAN Pengfei
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Reasonable Working-Face Size Based on Full Mining of Overburden Failure
Sustainability, 2023 To improve production efficiency and prevent potential disasters in coal mines, comprehensive research methods such as similar simulation, numerical simulation, theoretical analysis, and on-site detection were used in this study. The migration characteristics of overburden rock under different working face lengths and development heights of water ...
Ziwei Ding +7 more
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Dynamic properties of undisturbed sand in deep overburden of a dam foundation
Yantu gongcheng xuebao, 2023 The ultra-deep overburden foundation is a great challenge for the construction of water conservancy and hydropower projects. The dynamic mechanical properties of overburden soil are the basis for discriminating liquefaction of foundation soil and ...
YU Yanyang 1, PENG Wenming 2, LI Jian 2, LUO Qixun 2, MA Fulong 2, CHEN Cong 3, LIU Enlong 1
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Overburden failure and water-sand mixture outburst conditions of weakly consolidated overlying strata in Dananhu No.7 coal mine. [PDF]
Sci RepThis study presents a case of weakly consolidated strata developed in Dananhu No.7 coal mine. Using a combination of numerical simulation, field measurement comparison, and the critical hydraulic gradient criterion, we investigate the overburden failure ...
Zhu J, Li W, Teng B, Lu Q, Li D, Li L.
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Effects of overburden characteristics on dynamic failure in underground coal mining
International Journal of Mining Science and Technology, 2017 Dynamic failures, or “bumps”, remain an imperative safety concern in underground coal mining, despite significant advancements in engineering controls. The presence of spatially discrete, stiff roof units are one feature that has been linked to these events.
Heather E. Lawson +3 more
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Fine detection of overburden strata based on time lapse high density resistivity method
矿业科学学报, 2019 Fine detection for the deformation failure of overburden strata caused by underground mining may provide reliable guidance for safety,high efficient and green coal mining.Firstly,the principle of overburden detection based on time lapse high density ...
Li Fei +5 more
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Study on the Overburden Failure Law of High-Intensity Mining in Gully Areas With Exposed Bedrock [PDF]
Frontiers in Earth Science, 2022 Most hilly areas are dotted with gullies, some of which contain plenty of water, especially in rainy seasons. Once surface water penetrates the underground working face, it will lead to an increased water inflow of the working face. Even worse, it may induce water and sand burst accidents.
Tan Yi +12 more
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Meikuang Anquan, 2021 In order to study the optimal scheme of staggered distance mining in double coal seam and its influence on the key strata of overburden structure, take the geological conditions of Yushen Mine Area as the background, the optimal scheme was selected from
SUN Xueyang, LU Mingjiao, LI Cheng, MIAO Lintian
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