Safety evaluation method of bottom coal thickness in thick coal seam roadway
Yunliang Tan,
Shilin Song,
Xiufeng Zhang
et al.
Abstract:In 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. The research results shown that the stress concentration area of composite floor is distributed in coal seam or rock stratum with large elastic modulus. With the increase of floor rock strength, the stress of coal-rock composite floor increased gradually, but the displaceme… Show more
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