DOI: 10.11799/ce202505010
Safety evaluation of floor failure of Group A coal slice mining in Pan'er Coal Mine,Huainan mining area
HUANG Gang
REN Bo
HAN Yunchun
YU Guofeng
WANG Chuang
Abstract：The mining of Group A coal in Pan'er Coal Mine in Huainan Mining area is seriously threatened by the highly confined water of floor.In order to clearly understand the depth and development mechanism of floor failure in Group A coal mining process,based on FLAC3D numerical simulation and microseismic monitoring technology,the stress distribution and floor failure range of Group A coal mining face under mining disturbance were analyzed.According to the real-time monitoring data of microseismic in the process of mining,the cluster analysis of floor fracture concentration range was made by SPSS software.The research results show that the concentrated depth of floor failure zone is 23～30 m,and the average floor failure depth is about 27 m.In the floor fractured rock mass of the lower slice mining face,there is a large concentration at the floor depth of 9～22 m,and it is highly concentrated at 21 m below the floor.The floor fractured body induced by the lower slice mining is basically within the failure range of the upper slice mining floor,and the mining failure zone and the water-bearing guide zone are not connected.
Keywords：floor confined waterslicingnumerical simulationmicroseismic monitoringfloor failure
Publication Date：2025-05-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 70-76 )