Results 21 to 30 of about 670,391 (188)
Application of reflected in-seam wave detection for small faults in thick coal seams
, 2022 In general, the fault distance and extension length of small faults in the working face of thick coal seams and extremely thick coal seams are short. Due to the limitation of resolution, it is generally difficult to detect such small faults with current ...
Xiaoyun, SU
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Prediction model of coal seam gas content based on ACSOA optimized BP neural network
, 2022 For the problem of coal seam gas content prediction, the influencing factors of coal seam gas content were analyzed by taking No.2 coal seam of Chensilou Coal Mine as the research object.
Prediction model of coal seam gas content based on ACSOA optimized BP neural network
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Advances in Civil Engineering, 2021 No. 21 coal seam is a full-thickness structured soft coal in Dengfeng coalfield. The coal seam gas-bearing capacity is high, and the permeability is poor, thus resulting in serious coal and gas outburst dynamic disasters.
Haibo Liu, Xucheng Xiao, Zhihang Shu
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Safety evaluation method of bottom coal thickness in thick coal seam roadway. [PDF]
Sci RepIn recent years, the number of roadway floor rock burst accidents is increasing, which seriously restricts the safe production of the mine. Therefore, safety evaluation method of bottom coal thickness in thick coal seam roadway was studied.
Tan Y, Song S, Zhang X, Liu X.
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Energies, 2022 Gas disasters, such as coal and gas outburst and gas overflow, always occur during the mining of the steep and extra-thick coal seam in the horizontal, fully mechanized, top coal slice caving (HFMTCSC) method. To solve these issues and guarantee the safe
Hao Zhang +4 more
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Key technologies for extraction and identification of gas target area for pressure relief in inclined thick coal seam [PDF]
, 2023 In order to study the dip angle effect on the evolution law of the target area for pressure relief gas drainage in inclined thick coal seams, the physical similarity simulation test and theoretical analysis were combined to study the fracture evolution ...
Shugang LI +4 more
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Static creep rockburst mechanism and CT inversion verification of deep thick coal seam roadways
Energy Science & Engineering, 2022 Compared with the traditional “dynamic‐static” load rockburst induced by working face mining, a new typical disaster with concealment characteristics has appeared in deep thick coal seam roadways, namely, static creep rockburst, the occurrence mechanism ...
Ming Zhang, Xuelong Hu, Gaoming Zhao
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, 2020 Coal is a climate-sensitive sediment that contains abundant paleoclimate information. In order to find out the paleoclimate information contained in the coal seam and the evolution of its controlling factors, the No.4 thick coal seam in the first member ...
Guoqi, DONG +4 more
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Prevention and control of gas hazard in close coal seam group under ultra-thick oil shale
Meikuang Anquan, 2021 Aiming at the characteristics that the overlying thick oil shale near coal seam group gas escape is difficult, coal seam spacing is close, the coal seam gas pressure and content is large, there is the possibility of coal and gas outburst danger, the ...
ZHANG Dongxu
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Surrounding rock support technology of extra thick coal seam roadway under the influence of mining
, 2021 In view of the difficulty of surrounding rock support in the extra thick coal seam roadway affected by twice mining in Suancigou Coal Mine, the deformation and failure law of surrounding rock in the extra thick coal seam roadway under the influence of ...
LYU Kun
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