Results 51 to 60 of about 1,653 (136)
Energy Science & EngineeringTo solve the problem of controlling large deformation of surrounding rock in deep soft rock roadway, the distribution characteristics and deformation mechanism of surrounding rock cracks in soft rock roadway under different lateral pressure coefficients ...
Yujie Ma +5 more
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Geofluids, 2021 The expansion of the roadway surrounding rock failure zone may connect the floor aquifer and cause the roadway water inrush. In order to reveal the mechanism of the roadway water inrush above confined water, we established the force model of the roadway ...
Xiaofei Guo +7 more
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Deep Underground Science and Engineering, EarlyView.This study reveals the failure evolution characteristics of deep cross‐fault roadway surrounding rock under excavation support and periodic weighting. Periodic weighting readily induces fault activation, with the spatial distribution of failed rock masses being controlled by the fault strike and dip.
Tiezhu Li +4 more
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Surrounding rock control technology of gob-side entry retaining in deep high mining face
Meikuang AnquanUnder the influence of multiple mining influences, the mining pressure is more intense and the surrounding rock deformation is large, which is easy to cause the surrounding rock instability of gob-side entry retaining in fully mechanized mining face.
Junhu ZHANG +5 more
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Mechanism of “seesaw‐type” rock burst in coal seam mining beneath mountainous areas
Deep Underground Science and Engineering, EarlyView.This study reveals the mechanism of “seesaw‐type” rock bursts during coal mining beneath mountainous areas. The advancing working face induces nonuniform fracturing of the overburden. The detached mountain mass then undergoes a seesaw‐type rotational movement around a shifting pivot, driving the primary fracture through a characteristic “open‐close ...
Chao Zhou +9 more
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Meikuang Anquan, 2020 In order to study the deformation and failure laws of roadway surrounding rock under the condition of layered rock, the one orbit lane of Shandong Yuncheng Coal Mine was taken as the research background, and PFC2D discrete element software was adopted ...
WANG Huifeng, SONG Libing
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Surrounding Rock Stability Classification Method of Coal Roadway Based on In Situ Stress
Advances in Civil Engineering, 2021 In situ stress is one of the most important factors affecting surrounding rock stability classification of coal roadway. Most surrounding rock stability classification methods do not fully consider the influence of in situ stress.
Yongjie Yang, Gang Huang, Lingren Meng
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Energy Science &Engineering, EarlyView.This study mainly explores the instability characteristics of roadways near faults in the working face. Taking the 51104 transportation roadway of the 51104 working face in Shengxin Coal Mine as the main research object, through theoretical analysis, borehole inspection, numerical simulation and on‐site mine pressure observation, the instability ...
Shuaifeng Yin +4 more
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Influence of in-situ rock stress on the stability of roadway surrounding rock: a case study
Journal of Geophysics and Engineering, 2019 Abstract In-situ rock stress was measured in the development roadway of Gucheng coal mine at +420 m level by using the stress relief method of hollow inclusion. The results show that the first principal stress was the vertical stress, the maximum horizontal principal stresses were distributed in the range of N10°E and N20°E, and the ...
Ming Ji, Hongjun Guo
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Pressure relief for drilling (trenching) and support technology in deep soft rock tunnels
Frontiers in Earth ScienceControlling surrounding rock stability in deep soft rock tunnels solely by increasing the support strength is challenging. The key areas where the surrounding rock of a roadway is prone to “instability” should be treated with comprehensive measures, such
Yang Ling, Xu Ying
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