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大柳塔活鸡兔井1-2煤采用分层开采的方法,但在上分层开采过程中没有铺设人工假顶,导致下分层开采时巷道布置困难。针对此问题,采用综合比较法最终选定外错式布置巷道。通过理论计算及数值模拟的方法得出上、下分层巷道合理的外错距应为4.2 m,据此结果布置下分层平巷。同时开采实践显示开采期间矿山压力不明显,无巷道变形现象,外错式布置方式比较合理。
Daliuta live chicken 1-2 wells coal wells using stratified mining methods, but in the process of stratification mining artificial false roof is not laid, leading to lower stratification mining roadway layout difficulties. In response to this problem, the comprehensive comparison of the final selection of the wrong type of layout of the roadway. Through theoretical calculation and numerical simulation, it is concluded that the reasonable outer clearance of upper and lower stratified roadway should be 4.2m, and the result is laid out under stratified laneway. At the same time mining practice shows that during the mining pressure is not obvious, no roadway deformation phenomenon, the wrong way of layout is more reasonable.