【摘要】 为弄清采动在工作面底板岩溶陷落柱围岩破坏及突水中所起到的作用,以葛亭煤矿底板隐伏岩溶陷落柱为研究对象,采用FLAC3D数值模拟软件对采动过程中的垂直方向应力场、塑性破坏区和垂直方向位移变化进行分析研究,分析了不同推进距离下隐伏底板岩溶陷落柱的突水过程。研究结果表明,随着推进距离的不断增加,岩溶陷落柱的塑性破坏范围不断增加,底板垂直方向的位移不断增大,当煤层底板的塑性破坏区和岩溶陷落柱的塑性破坏区发生连接时,容易发生底板岩溶陷落柱突水事故。更多还原

【Abstract】 In order to find out the role of mining in the failure and water inrush of the surrounding rock of karst collapse column of the working face floor, taking the hidden karst collapse column of the floor of Geting Coal Mine as the research object, FLAC3 D numerical simulation software was used to analyze and study the vertical stress field, plastic failure zone and vertical displacement changes in the mining process. The water inrush process of karst collapse column of hidden floor with different advancing distance is analyzed. The research results show that with the increasing of the advancing distance, the plastic failure range of karst collapse column is increasing, and the vertical displacement of the floor is increasing. When the plastic failure area of the coal seam floor is connected with the plastic failure area of the karst collapse column, water inrush accident of the karst collapse column of the floor is likely to occur.更多还原