回坡底煤矿回采巷道切顶卸压工程实践

Practice on Pressure Relief by Roof Cutting in Gateway of Huipodi Colliery

为了解决回坡底煤矿11-102工作面进风巷一侧(沿空留巷)巷道受力及变形量较大的问题,决定采用切顶卸压技术;基于以往大量的施工经验,拟定施工工艺;依据施工段和未施工段内巷道围岩矿压监测数据,对锚杆锚索受力、巷道围岩变形及围岩受力特征进行分析;切顶卸压施工段内巷道围岩变形及受力均有明显的降低,巷道围岩控制效果良好。

Aiming at the roadway stress and deformation in gob-side entry retaining at 11-102 working face of Huipodi Colliery,the author proposes the technology of pressure relief by roof cutting,including the construction technique designed through former construction experience and the characteristics analysis of bolt and cable stress,and surrounding rock deformation and stress based on ground pressure monitoring data of roadway surrounding rock in construction section and unconstruction section,which can remarkably reduce the surrounding rock deformation and stress of roadway in construction section with good control effect of surrounding rock.