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以五虎山矿9#、10#煤层赋存及开采地质条件为背景,运用数值模拟的方法对上层开采引起的底板应力分布规律进行研究,分析了水平应力对采空区F极近距离煤层回采巷道的影响。研究结果表明:采空区边缘所谓的“应力降低区”只是对于垂直应力而言,而在此区域的水平应力并非降低区,垂直应力最小处水平应力最大,垂直应力最大处水平应力最小;二者均在距采空区煤壁20m处趋于平稳。回采巷道在应力平稳区围岩变形最小,有利于巷道掘进及维护。
Based on the geological conditions of 9 # and 10 # coal seams in Wuhushan Mine and the geological conditions of mining, numerical simulation is used to study the stress distribution rules of floor caused by upper mining. The effects of horizontal stress on the F- Impact of mining roadway. The results show that the so-called “stress reduction zone” at the edge of the goaf is only for the vertical stress, but the horizontal stress in this area is not the lower one, the horizontal stress is the highest at the minimum vertical stress and the minimum is the horizontal stress at the maximum vertical stress Both of them are stable at 20m away from the coal wall of goaf. The mining roadway has the least deformation in the area where the stress is stable, which is good for roadway excavation and maintenance.