近距离煤层采空区下回采巷道合理位置确定

Determination of Rational Mining Roadway Position under Gob in Close-distance Coal Seam

以中兴煤矿2~#_(下)煤层回采巷道位置的确定为背景,通过理论计算,确定2~#煤层3211工作面开采引起的超前支承压力对底板破坏深度最大为15.71 m,2~#_(下)煤层回采巷道采用内错式布置,内错距为15 m。试验检测结果表明,2~#_(下)煤层回采巷道布置合理,巷道变形量较小,完全满足巷道稳定控制的需要。

With zte under 2# coal seam mining in coal mine position indeed as the background, through the theoretical calculation, determine the 2# coal seam in 3211 working face advance abutment pressure caused by mining on the depth of floor damage up to 15.71 m,2# coal seam mining under the fault type is decorated,the fault distance is 15 m.The results of test results show that the deformation quantity of the roadway is relatively small, and the need of stable control of roadway is satisfied.