边角煤开采在镇城底矿的应用初探

Brobe into the Application of Marginal Coal Mining in Zhenchengdi Coal Mine

镇城底矿由于断层多且比较发育、煤层顶底帮弱、局部地方低于奥灰水水位超过90m属于带压开采等不利因素形成了很多边角煤地段。该矿南一、东二采区都已进入收尾阶段,由于断层切割、无炭柱的影响留下多处不规则段。此类边角煤及煤柱在采区收尾封闭前如不及时回收,将会丢失。为了延长矿区寿命,尝试采用轻型支架放顶煤工艺进行边角煤回采、窄小煤柱回采及变采长壁式回采,取得了良好的效果。

Many marginal coal sections have formed in Zhenchengdi Coal Mine caused by some negative factors such as more and well developed faults,coal seam＇s weak roofs and floors,and coal mining under pressure in some locations with the Ordovician Limestone Water level under 90 m,etc.The South No.1 and East No.2 mining areas have recently entered the sunset stage.Because of the influence of fault incisions and Karst collapse pillars,many irregular sections left behind.Such marginal coal and coal pillar would be lost if they couldn＇t be recovered timely before ending and closing of the mining area.In order to prolong the working life of the mining area,the light support top coal caving technology has been adopted to carry out the marginal coal mining,small coal pillar mining and variable long-wall mining,achieving good effect.