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In order to study the distribution of lateral floor abutment pressure at a working face,we first used elasticity theory to establish a distribution model of lateral floor abutment pressure and then analysed its distribution.Second,we established a three-dimensional numerical simulation model of the Haizi Coal Mine No.86 mining area by using FLAC~(3D)(ITASCA Consulting Group) software.We investigated the distribution of lateral floor abutment pressure of a stope,which indicated that the position of abutment pressure peak varies at different floor depths.We then determined the rational reinforcement range of a floor roadway,based on the conclusion reached earlier.Finally,we used our conclusions in support of the No.86 mining area crossing-roadway.The supported crossing-roadway remained stable when mining the upper workface,which validates the accuracy of our numerical simulation and provides a future reference for the support of span-roadways under similar conditions.
In order to study the distribution of lateral floor abutment pressure at a working face, we first used elasticity theory to establish establish a distribution model of lateral floor abutment pressure and then analyze its distribution. Second, we established a three-dimensional numerical simulation model of the Haizi Coal Mine No.86 mining area by using FLAC ~ (3D) (ITASCA Consulting Group) software. We investigated the distribution of lateral floor abutment pressure of a stope, which indicates that the position of abutment pressure peak varies at different floor depths. We then determined the rational reinforcement range of a floor roadway, based on the conclusion reached earlier. Finaally, we used our conclusions in support of the No. 86 mining area crossing-roadway. The supported crossing-roadway remained stable when mining the upper workface , which validates the accuracy of our numerical simulation and provides a future reference for the support of span-roadways under similar conditions.