摘要
针对王庄煤矿多次动压下沿空掘巷,分析了高强预应力锚杆及注浆加固机理。增大锚杆的预紧力,能提高围岩的承载能力,实现破碎锚固围岩高阻让压。但由于围岩破碎,需通过注浆改变破碎围岩力学性能,还能改变锚杆与围岩的相互作用方式。提出了采用高强预应力锚杆及注浆加固联合支护技术用于沿空掘巷的围岩控制,现场效果良好。
In Wangzhuang Coal Mine roadway driving along goaf under dynamic pressure for many times,the author analyzes the mecha-nism of high strength prestressed bolt and grouting reinforcement.Increase bolt pre-tightening force, which can improve the bearing capacity of surrounding rock, broken anchorage of surrounding rock, high resistance to pressure.But due to the surrounding rock bro-ken, need to change the broken surrounding rock by grouting and mechanical performance, can also change the way of bolt and the in-teraction of surrounding rock.Proposed USES the high strength prestressed bolt and grouting reinforcement combined supporting tech-nology to control the surrounding rock of roadway driving along goaf, the effect is good.
出处
《煤》
2014年第11期5-6,32,共3页
Coal
基金
国家自然科学基金资助项目(51374215)
高等学校全国优秀博士学位论文作者专项资金(201030)
霍英东教育基金会第十四届高等院校青年教师基金应用课题(142018)联合资助
关键词
沿空掘巷
注浆加固
预应力
联合支护
roadway driving along goaf
grouting reinforcement
prestressed
combined support
