Results 41 to 50 of about 2,676 (167)
Numerical Simulation of Surface Deformation in Goaf
IOP Conference Series: Earth and Environmental Science, 2020 Abstract Coal mine goaf is a hidden, complex, surface deformation of a large range and easy to cause geological disasters of the bad construction site, the surface engineering construction of great harm. The uneven subsidence, horizontal movement, deformation, collapse and other disasters of the goaf surface have serious potential safety
Dingkang Hu, Nainan He, Debin Gao
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Energy Science &Engineering, EarlyView.This work reveals the “C‐Y,” double “Y,” “π,” and “Y” fracture modes of thick, hard strata and their progressive breaking process (O‐F‐R/S mode), providing a theoretical basis for controlling strong ground pressure in deep mining. ABSTRACT In response to the dynamic hazards caused by the fracture of thick‐hard strata in deep mining, this study ...
Meilu Yu, Jianping Zuo
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Meikuang Anquan, 2020 In view of the working face of coal and gas outburst, adopting the measures of gas drainage and outburst elimination will increase the air leakage in the goaf, and then change the flow field in the goaf, resulting in too long oxidation zone in the goaf,
LI Xin, LIU Dongming, TANG Hui, WANG Bo
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Underground Goaf Parameters Estimation by Cross-Iteration with InSAR Measurements
Remote Sensing, 2021 Determining the geographic location and spatial distribution of underground goaf is of great significance for the prevention of mining subsidence hazards and the detection of illegal mining.
Weihao Zhang +4 more
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Energy Science &Engineering, EarlyView.A novel collaborative control technology of gob‐side entry retention with narrow roadside filling wall is proposed, wherein anchoring end of anchor cable must penetrate the boundary line of stress peak (plastic zone). ABSTRACT Gob‐side entry retention represents a major technological innovation in the history of coal mining, offering numerous ...
Wenxu Liang, Wei Fu, Ziwen Liu
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Meikuang Anquan, 2023 Aiming at the problem of gas accumulation in upper corner and return air roadway of single U type ventilation mining in early stage of gob-side entry retaining in Mingxin Coal Mine, the mathematical equation of gas convection and diffusion is established
ZHANG Zeyu, QIAO Yonggang, LI Haojun, LUO Tongtong, GUO Qiang, LI Lianghong
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Energy Science &Engineering, EarlyView.Based on theoretical analysis, the energy‐evolution behavior of the surrounding rock at various depths on the solid‐coal side of the 221303 material roadway during the “advancing‐toward‐mining” process was first clarified. Numerical simulations were then performed to validate and elaborate on the theoretical results.
Wei Zhang +7 more
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Meikuang Anquan, 2020 To solve the goaf water disaster of Hanzui Coal Mine, aiming to the technical problem of detection and drainage for goaf water with long distance under complicated geological conditions that the coal seam is soft and the floor is badly mudstone, the ...
LIU Mingjun, LI Xiaolong, YANG Zhong, ZHANG Jiadi
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Energy Science &Engineering, EarlyView.Fluidized gangue backfilling controls mining subsidence through stress redistribution in composite backfill‐pillar systems, reducing surface settlement and stress concentrations. Multi‐scale experimental and numerical analysis provides quantitative design parameters for optimizing ground control in sustainable underground coal mining operations ...
Weilong Zhang +11 more
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A New Classification Method of Mine Goaf Ground Activation Considering High-Speed Railway Influence
Frontiers in Earth Science, 2022 With the rapid development of high-speed railways in China, it is inevitable that some of the lines will have to traverse through the mine goaf ground, and there is little research on whether the “activation” of the foundation of the mine goaf ground ...
Lian-wei Ren +5 more
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