开采动压影响下巷道变形规律分析

针对平煤八矿深处下部煤层工作面开采导致的上部煤层邻近采区工作面回风巷道掘进困难、变形严重等现象,通过监测回风巷道表面的变形情况,总结出下部煤层开采对上部煤层邻近采区巷道的动态影响规律:己16,17-22020工作面的回采活动对回风巷道的影响范围约200 m,变形最为严重的区域在工作面前方20m和后方20 m范围内,从而确定顶、底板和两帮位移的平均速度,为巷道的合理布置提供参考依据。

Analysis on Discipline of Roadway Deformation Under Influence of Dynamic Pressure Induced by Mining

Aiming at the phenomenon of the mining difficulty and serious deformation of return airflow roadway caused by mining lower coal seam in deep part of Pingdingshan No.8 Coal Mine,through monitoring the deformation conditions of the surface of ventilation roadway,the dynamic influence law of lower coal seam mining to roadway near to mining area in upper coal seam was summarized:the influence scope of the mining activities of Ⅵ16,17-22020 working face is about 200 m,the region that most serious deformation occurred was in anterior to mining face 20 m and posterior to working face 20 m.The average movement velocity of roof and floor were also judged out,which provides a reference for the reasonable arrangement of the roadway.