潞宁煤矿沿空巷道顶板大深度切顶卸压技术设计及应用

Design and application of top depth cutting and unloading technology along roof of empty roadway in Luning Mine

为了控制沿空侧巷道顶板的强压影响,借鉴现有的沿空留巷切顶卸压技术,结合潞宁煤矿22113工作面的实际生产状况,提出了沿空巷道顶板大深度切顶卸压技术。通过模拟确定22113工作面回风巷的合理切割高度为12 m,爆破间距6 m。实测结果表明,该技术有效的控制了巷道变形和煤柱稳定性。

In order to control impact of pressure on roof of hollow roadway, existing technology of cutting and unloading top of left lane was used. Combining with actual production status of 22113 working face, top depth cutting and unloading technology along roof of empty roadway was proposed. Reasonable cutting height in 22113 working face return lane was determined as 12m through simulation, and blasting space was 6m. According to measured results, the technology was effective in controlling deformation of roadway and stability of coal column.