云盖山一矿切顶卸压沿空留巷技术应用实践

为了解决云盖山一矿工作面采掘接替紧张问题，以22202工作面运输巷为例，进行了沿空留巷应用研究，提出了切顶卸压沿空留巷分段式支护技术，并进行了现场应用。应用结果表明:采用切顶卸压技术能有效切断沿空留巷顶板，待工作面推进后，沿空留巷顶板沿着切缝线断裂；采用三段式支护巷道，有效控制了沿空留巷围岩变形；切顶卸压沿空留巷技术应用后，现场留巷效果较好。

Application practice of gob-side entry retaining technology by roof cutting and pressure release in Yungaishan No.1 Coal Mine

In order to solve the problem of mining displacement in the working face of Yungaishan No.1 Coal Mine，the application research of gob-side entry retaining in 22022 working face transportation roadway was carried out，and the subsection support technology of roof cutting pressure relief gob-side entry retaining was put forward，and field application was carried out.The application results show that roof cutting and pressure relief technology can effectively cut off the roof of gob-side retaining roadway，and the roof of gob-side retaining roadway breaks along the cutting line after the face advances； the surrounding rock deformation of gob-side retaining roadway is effectively controlled by three-section support roadway； and the effect of gob-side retaining roadway is better after the application of roof cutting and pressure relief technology.