深部高应力膨胀性软岩泵房支护技术

基于唐口煤矿泵房的岩石力学试验、岩石矿物组成分析、地应力测试、破坏机理分析,提出了采用以锚索桁架、锚注为核心的联合支护体系,来解决深部高应力膨胀性软岩大型硐室的支护技术难题。监测结果表明:加固后泵房围岩最大变形量仅有6 mm,3个监测断面平均变形量仅为4.7 mm,结果说明以锚索桁架、锚注为核心的联合支护体系提高了围岩自身承载能力和支护结构的整体性,有效地控制住了围岩的变形和底臌,保持了泵房围岩的长期稳定。

Support Technology of the Pump House in Deep Swelling Soft-rock under High Stress

Based on the rock mechanical tests，mineral composition analysis，ground stress test as well as failure mechanism analysis of the pump house in Tangkou coal mine，the combined support system with bolt anchor-truss and bolt-grouting as core was proposed to solve the support problems of deep swelling soft-rock large chamber under high stressThe monitoring results indicate that the maximum surrounding rock deformation of the pump house is only 6 mm and the average deformation of three monitoring sections is only 4.7 mm after the reinforcementThe results indicate that the combined support system with bolt anchor-truss and bolt-grouting as core has improved the self-bearing capacity of surrounding rock and the integrity of supporting structureIt can effectively control the deformation of the surrounding rock and floor heave and maintain the long-term stability of the surrounding rock of the pump house