断层破碎带大断面巷道围岩变形破坏机理及控制技术

Deformation and failure mechanism and control technology of surrounding rock in large section roadway of fault fracture zone

为了解决断层破碎带大断面巷道围岩控制的难题,结合长平矿4320回风措施巷的围岩地质条件,分析了断层破碎带巷道围岩破碎机理,提出了超前注浆加固+锚杆索支护+工字钢补强的围岩控制方案。试验表明,超前注浆加固可以改善围岩力学性能,提高围岩刚度和强度;及时进行锚杆索加密支护和工字梁加固的主被动支护可有效控制巷道的有害变形。

In order to solve the problem of surrounding rock control of large-section roadway in fault fracture zone,combined with the surrounding rock geological conditions of Changping Mine 4320 air return roadway, the surrounding rock fracture mechanism of fault fracture zone roadway was analyzed, and advanced grouting reinforcement + anchor was proposed, cable support + I-beam reinforcement of the surrounding rock control program. The test showed that the advanced grouting reinforcement could improve the mechanical properties of the surrounding rock and improve the stiffness and strength of the surrounding rock. The active and passive support of the bolt and cable reinforcement support and the I-beam reinforcement could effectively control the harmful deformation of the roadway.