摘要
针对深部极破碎软岩巷道掘进后围岩变形严重等风险事故,以陶二矿区新北运输大巷为工程背景,通过围岩钻孔窥探、地质雷达探测、电镜微观扫描以及地应力测试等矿压探测技术,深入研究极破碎软岩的失稳破坏机制;在此基础上,提出"初期锚网固化支护、中期预留变形减压、后期封闭增加强度"的刚柔耦合返修加固方案,监测结果表明:通过巷道初期和后期形成的非连续"双壳"支护结构,能够确保将深部极破碎软岩的变形控制在合理范围,使支护体系及岩体耦合构成受力整体,保证巷道的长期稳定及安全。
Aimed at the risk accidents such as the serious deformation of surrounding rock in deep roadway with extremely bro-ken soft rock, and taking the Xinbei haulage of Taoer mine as a project case, the instable failure mechanism of roadway with extremely broken soft rock was studied in depth by drilling technique, geologic radar detection, microscopic scanning of elec-tron microscopy, stress measurement and so on. On this basis, a scheme, that was rigid and flexible coupling repair and rein-forcement measures, was proposed. In this scheme, anchor network was adopted for curing support at first stage, reserved de-formation and decompression at the medium stage, as well as sealing for increasing strength at last. The monitoring results showed that according to the discontinuous ＂bivalve＂ support structure formed at the first and final stage, the deformation of roadway with extremely broken soft rock in the deep could be controlled into a reasonable range, and make the support system and the rock mass coupling as a force whole, which could ensure roadway stability and safety in long term.
作者
彭军
刘燕
PENG Jun;LIU Yan(Chongqing Vocational Institute of Engineering,Chongqing 402260,China)
出处
《矿业研究与开发》
CAS
北大核心
2018年第8期71-75,共5页
Mining Research and Development
关键词
破碎岩体
软岩巷道
失稳破坏
支护结构
返修加固
Broken rock mas
Soft rock roadway
Instable failure
Support structure
Repair and reinforcement
