Results 31 to 40 of about 4,616 (263)
Applied SciencesBecause of its strong bearing capacity and large size, a thick and hard roof is the main source of strong ground pressure in a stope, and its breaking and migration mechanism and effective control are very important for realizing safe and efficient ...
Xingping Lai +4 more
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Determination and Application of the Unsupported Roof Distance in Coal Roadway Driving With the Thick and Hard Main Roof [PDF]
, 2020 Abstract The authors have requested that this preprint be removed from Research Square.
Yang Sen +5 more
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Ground fracturing pre-control technology for potential mine seismic risk of thick and hard roof
Meitan kexue jishu, 2023 Mines with thick and hard roof face high risks of mine seismic activities and mine pressure during mining, which easily leads to dynamic disasters in mines.
Shuwen WANG +5 more
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IOP Conference Series: Earth and Environmental Science, 2021 Abstract In order to explore the reasonable blasting parameters of the gob-side entry retaining technology under the specific conditions of thick and hard roof, and realize successful roof cutting and safe roadway retaining, the thick and hard roof of the XV1306 working face in the first panel of Yixin Coal Mine is used as the research ...
Jianquan Tang, Hongliang Liu, Anfa Chen
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Study on disaster mechanism of thick and hard overhanging roof and top cutting control technology
Gong-kuang zidonghuaTo address the challenges of significant deformation and high instability risks in the surrounding rock of unsupported roadways beneath a laterally thick and hard overhanging roof, this study focused on the 3810 working face transport roadway in ...
GENG Ming, SUN Jing
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Sustainability, 2022 In order to ensure the application of gob-side entry retaining by roof cutting for thick and hard sandstone roofs, the key technology of pre-split blasting was studied. The LS-DYNA was used to analyze the blasting effect of the energy-gathering pipe. Using the methods of theoretical analysis and numerical simulation, it was determined that the optimal ...
Chaowen Hu +5 more
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Applied Sciences, 2023 Practice and theory research proved the “square effect” during longwall mining with hard–thick strata lying on the coal seam, which could cause severe underground pressure and even dynamic disasters, such as coal burst; therefore, it became a key area ...
Hu He +4 more
semanticscholar +1 more source
Meitan kexue jishu, 2023 The mining of extremely thick coal seam form a large space stope, the fracture disturbance of hard roof spreads to a wide range, the working face weighting has the characteristic of “strong mine pressure”, it is obviously different from rock burst ...
YU Bin +3 more
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Development status and Prospect of directional hydraulic fracturing technology for coal mine roof [PDF]
E3S Web of Conferences, 2020 Aiming at the harm and control methods of thick and hard roof in coal mine, the paper firstly analyzes the advanced control methods of thick and hard roof, such as directional shaped charge blasting roof control technology, hydraulic fracturing roof ...
Liangwei LI
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