深井软岩巷道高强全锚注支护机理与技术应用  

High Strength and Complete Bolting-grouting Support Mechanism and Technology Application in Deep Soft Rock Roadway

作　　者：蒋敬平[1] 黄庆显 魏夕合 杨战标 

机构地区：[1]济南澳科矿山工程技术有限公司,山东济南250031 [2]平煤神马煤业集团,河南平顶山467000 [3]山东安科矿山支护技术有限公司,山东济南250000

出　　处：《煤矿安全》2016年第10期33-35,共3页Safety in Coal Mines

基　　金：中国博士后基金资助项目(20090461257)

摘　　要：针对深井巷道围岩脆延性转化及地质（工程）软岩大变形力学特性,通过力学试验、实测检验等综合研究方法,对高强锚注支护作用机理进行了初步探索。研究表明：高强全锚注支护实现了由传统端锚向全锚的转变,支护系统刚度提高了5.8倍,抗剪强度提高了0.4~0.5倍,扩大了支护结构的有效承载范围,改善了围岩应力状态,提高了围岩自承能力;平煤一矿千米埋深回风上山试验段采用高强中空注浆锚杆、高强中空注浆锚索进行高强全锚注支护,巷道两帮移近量5 mm,顶板最大变形量600 mm,相比原支护,显著降低了围岩变形量,简单修复即可实现巷道持久稳定。Aiming at the mechanical properties of brittle ductile transition of surrounding rock in deep mine roadway and the large deformation of soft rock in geological engineering,through the mechanical test,measurement check and other comprehensive research methods,the mechanism of high strength bolting-grouting support is preliminarily explored. Experimental studies show that high strength whole bolting-grouting support is achieved by the traditional end anchor to full anchor. The stiffness of the supporting system is 5. 8 times,the shear strength is increased by 0. 4 to 0. 5 times and the surrounding rock stress state is improved,and the self-bearing capacity of surrounding rock is improved; Pingdingshan Coal Mine km buried deepth return air uphill test section used high-strength hollow grouting bolt,high strength hollow grouting anchor cable to carry out high strength anchor bolting,and convergence of two sides of roadway is 5 mm,and maximum deformation of roof is 600 mm. Compared to the original support,it significantly reduced the amount of surrounding rock deformation,and simple repair can realize stable and sustainable roadway.

关 键 词：深井软岩 大变形 高强锚注支护 巷道支护 抗剪强度 

分 类 号：TD353[矿业工程—矿井建设]