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Fracture mechanism of roof key strata in Dongjiahe coal mine using microseismic moment tensor [PDF]
Geomatics, Natural Hazards & Risk, 2021 Response characteristics of key strata during the periodic weighting process in Dongjiahe coal mine were investigated using micro-seismic (MS) monitoring. Fracture types of key strata were identified through the moment tensor inversion. Finally, fracture
Ke Ma +6 more
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Rock burst mechanisms induced by dynamic and static loading under composite key strata: a case study [PDF]
Scientific ReportsIn the Ordos mining area of China, composite effects between adjacent thick and weak sandstone strata increase the risk of rock burst. Understanding the mechanism of rock bursts under these conditions and developing targeted prevention and control ...
Guowei Lyu +7 more
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Mining stress formation and distribution: Predictive model based on overburden key strata structure
Energy Science & EngineeringIn coal mines, the effective extraction of relief gas and the prevention of dynamic disasters depend on accurate predictions of the spatial distribution of mining stress in the overlying rock.
Hongkai Han +7 more
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Height of overburden fracture based on key strata theory in longwall face. [PDF]
PLoS One, 2020 Among the three overburden zones (the caving zone, the fracture zone, and the continuous deformation zone) in longwall coal mining, the continuous deformation zone is often considered to be continuous without cracks, so continuum mechanics can be used to calculate the subsidence of overburden strata.
Lu W, He C, Zhang X.
europepmc +5 more sources
Key Strata Identification of Overburden Based on Magnetotelluric Detection: A Case Study [PDF]
Applied Sciences, 2020 The severe overburden failure induced by high-intensity mining is the essence of eco-environmental problems in Northwest China, and the degree of overburden failure is closely related to the location and failure of key strata (KS), which controls part of
Yunguang Wang +3 more
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Formation mechanism of stress arch during longwall mining based on key strata theory
Energy Exploration & Exploitation, 2022 The traditional stress arch hypothesis during longwall mining fails to elucidate the formation mechanism of stress arch, and the morphological characteristics and evolution of stress arch are indefinite.
Feng Wang +3 more
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Shear-Compression Failure Condition of Key Strata Under Elastic Support During Periodic Breakage
Applied SciencesThe shear-compression failure of key strata leads to stair-step collapse and severe mine pressure, posing significant safety risks in coal mines. Existing theories fail to account for the boundary conditions and breaking sizes of key strata, making ...
Hongjie Liu +3 more
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Advances in Civil Engineering, 2019 In order to analyze the impact of compound breakage of key strata on overlying strata movement and strata pressure behavior during the fully mechanized caving mining in shallow and extremely thick seams, this paper took the 1322 fully mechanized caving ...
Junmeng Li +5 more
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Key Strata Inducing Dynamic Disasters Based on Energy Condition: Criterion and Application [PDF]
Geofluids, 2021 The thick and hard rock strata (THRS) exist widely in coal measure strata, which control the movements of overlying rock strata in stopes. When THRS break, great energy is released, which could aggravate the risks of coal and gas outburst, rock burst, and other dynamic disasters.
Chao Xu +6 more
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Scientific Reports, 2022 We have investigated the activation characteristics of mining faults and the effect of grouting reinforcement under thick loose layer and thin bedrock of the working face and evaluate their impact on the safety of mining at similar working faces ...
Wenquan Zhang +5 more
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