望峰岗矿-817m北翼轨道石门新型支护试验研究

Experimental Study on New Type Support at North Railway Crosscut of-817 m of Wangfenggang Coal Mine

望峰岗矿-817 m北翼轨道石门存在巷道围岩破碎、地压大等不利情况。在分析望峰岗矿现有巷道支护的基础上,针对试验巷道采取新的支护材料,加强支护强度,把原来的一次喷浆,改为网内初喷和网外复喷,有效地控制了围岩的松动和变形。

The north railway crosscut at the depth of - 817 m of wangfenggang mine has disadvantage conditions, such as fractured rocks and high earth pressure. Based on the analysis of the existing support of wangfenggang mine, new support material is adopted in the testing tunnel, strengthening the support strength. First guniting in the steel grid and second guniting outside the steel grid replaced the formerly once guniting, and it can effectively control the slack and deformation of surrounding rocks.