构造应力影响下软岩巷道底鼓机理及防治措施

Mechanism and Control of Floor Heave in Soft Rock Roadways under Tectonic Stress

针对鑫鼎泰煤业2号煤层回风大巷底鼓严重问题。分析了巷道底鼓的影响因素,确认底鼓属于挤压流动性底鼓,得出构造应力、围岩性质和支护方案不合理是导致巷道底鼓的主要因素,提出采用锚索网-双U29型钢环形支架联合支护方案。研究结果在鑫鼎泰煤矿2号松软破碎煤层轨道大巷成功应用,可为松软破碎围岩巷道的支护问题提供参考。

To solve the serious floor heave paper analyzed influential factors of the floor in return-air alley of No.2 seam in Xindingtai Mining Co., the heave and determined it as squeeze-fluidity heave. Tectonic stress, surrounding rock properties, and unreasonable support plan are the main factors of the floor heaves. Therefore, we proposed the combined support with anchor-cable-mesh and double U29 steel ring. The results showed the successful application in the rail alleys of No.2 soft-broken seam, which could be reference for the support for the soft and broken surrounding rock roadways.