【摘要】 斜沟煤矿18201工作面采动对+700 m水平南翼3条大巷破坏严重。因此,对18201工作面材料巷实施了切顶卸压技术,根据材料巷顶底板岩性,确定了合理的切顶卸压孔长度及钻孔间距;并利用FLAC3D数值软件模拟对比了切顶及不切顶条件下,辅运大巷的应力分布情况,对+700 m南翼辅运大巷两帮移近量的观测结果表明,该切顶卸压护巷方案较为合理。更多还原

【Abstract】 The mining of 18201 working face in Xiegou coal mine seriously damaged 3 roadways of the south wing at +700 m horizontal level. Therefore, the roof-cutting pressure relief technology was applied to the roadway of 18201 working face. The reasonable length and spacing of the drilling holes for roof-cutting and pressure relief were determined according to the lithology of the roadway, FLAC3 D numerical software was introduced for stress distribution comparison under the condition of before and after the roof-cutting. Observation shows that the scheme for roof-cutting and pressure relief is more feasible.更多还原