滑动构造区三软强变形煤层巷道变形破坏规律研究

Research on the Deformation and Failure Law of Three Soft Strong Deformation Coal Seam Roadways in Sliding Structure Area

郑州煤电告成煤矿二1煤21051下付巷属于典型的“三软”煤层,巷道围岩松散破碎,巷道变形严重。为确保施工安全,研究了其变形和围岩松动圈变化规律。巷道围岩两帮及顶底移近量平均达到600~950 mm,顶底最大,两帮次之,表现为四周变形,属于大变形软岩巷道;巷道围岩松动圈范围一般为顶板4.3 m、两帮3.0 m、底板1.26 m,属于大松动圈。巷道围岩可以采用锚杆锚索施工。

The 21051 lower roadway of the twoone coal in Gaocheng Coal Mine of Zhengzhou Coal and Power belongs to a typical"three soft"coal seam,with loose and fractured roadway surrounding rock and severe deformation of the roadway.To ensure construction safety,its deformation and changes law of the surrounding rock loose zone are studied.The average displacement amount of the two sides and roof and floor of the roadway surrounding rock reaches 600-950 mm with the highest displacement amount at the roof and floor,followed by the two sides,showing deformation around the roadway,belonging to a large deformation soft rock roadway;The range of the loose zone in the roadway surrounding rock is generally 4.3 m for the roof,3.0 m for the two sides,and 1.26 m for the floor,which belongs to a large loose zone.The roadway surrounding rock can be constructed using anchor rods and anchor cables.