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Key rock strata effecting analysis on surface boreholeshear deformation fracture |
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| Institution: | Faculty of Civil Engineering, Chongqing University, Chongqing 400030, P. R. China; Chongqing Institute of China Coal Research Institute, Chongqing 400037, P. R. China;Faculty of Civil Engineering, Chongqing University, Chongqing 400030, P. R. China;;Chongqing Institute of China Coal Research Institute, Chongqing 400037, P. R. China;Chongqing Institute of China Coal Research Institute, Chongqing 400037, P. R. China |
| Abstract: | A good method for creating a surface borehole for withdrawing coal strata methane is to build before excavation and use during the whole process. But the excavation greatly affects the overlying rock strata, and when the excavation face passes through the |
| Keywords: | methane drawing surface borehole shear slippage key strata |
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