全煤巷破碎应力区支护技术应用

Application of Support Technology in Broken Stress Zone of Full Coal Roadway

三交河煤矿203运输顺槽掘进过断层应力区围岩严重破碎,导致巷道原永久支护施工难度大、支护后支护体破断严重,决定对断层应力区采取“注浆加固+桁架锚索+π型钢棚”联合支护技术,保证了巷道快速过应力区,控制了围岩失稳现象。

The excavation of the 203 transportation channel in Sanjiaohe Coal Mine severely broken the surrounding rock in the fault stress area,causing difficulty in the construction of the original permanent support of the roadway,severe broken and fracture to the support body after the support.It is decided to adopt a combined support technology of"grouting reinforcement+truss anchor cable+π-shaped steel shed"for the fault stress area,ensuring that the roadway quickly passes through the stress area and controlling the instability phenomenon of the surrounding rock.