巷道围岩深孔反向分级注浆工艺研究  

Study on Deep Hole Reverse Grading Grouting Technology in Surrounding Rock of Roadway

作　　者：辛保彦 成云海 XIN Baoyan;CHENG Yunhai(College of Resources,Shandong University of Science and Technology,Tai′an 271000,China;Institute of Mining Engineering,Shandong University of Science and Technology,Tai′an 271019,China)

机构地区：[1]山东科技大学资源学院,山东泰安271000 [2]山东科技大学采矿工程研究院,山东泰安271019

出　　处：《煤炭技术》2024年第5期142-147,共6页Coal Technology

摘　　要：以安徽某矿为试验矿井,针对现有分级注浆工艺及该矿使用深浅孔注浆工艺存在问题,提出一种深孔反向分级注浆工艺;通过数值模拟方法,对比了反向分级注浆工艺与深浅孔注浆工艺的注浆效果,结果表明:反向分级注浆工艺在浆液扩散、改善围岩应力等方面效果比深浅孔注浆工艺更好;研发了用于分隔深部与浅部浆液的分级隔离装置及第二级注浆的开启装置爆破阀,通过分级隔离装置的黏结强度测试、爆破阀的开启压力测试,选出了二者最佳配合使用方案;采用反向分级注浆工艺和深浅孔注浆工艺对其巷道围岩进行加固,并对注浆效果进行对比分析,结果表明:反向分级注浆工艺较深浅孔注浆工艺时间快了约43%,注浆压力提升了4 MPa,反向分级注浆工艺较深浅孔注浆工艺的注浆量增加了40%~60%。Taking a mine in Anhui province as the test mine,aiming at the problems existing in the existing grading grouting process and the use of deep and shallow hole grouting process in this mine,a deep hole reverse grading grouting process is proposed.Through the numerical simulation method,the grouting effect of the reverse grading grouting process and the deep and shallow hole grouting process is compared.The results show that the reverse grading grouting process is better than the deep and shallow hole grouting process in terms of slurry diffusion and improvement of surrounding rock stress.A grading isolation device for separating deep and shallow slurry and a blasting valve for the opening device of the second-stage grouting were developed.Through the bond strength test of the grading isolation device and the opening pressure test of the blasting valve,the best combination of the two was selected.The reverse grading grouting process and the deep and shallow hole grouting process are used to reinforce the surrounding rock of the roadway,and the grouting effect is compared and analyzed.The results show that the reverse grading grouting process is about 43%faster than the deep and shallow hole grouting process,the grouting pressure is increased by 4 MPa,and the grouting amount of the reverse grading grouting process is 40%to 60%higher than that of the deep and shallow hole grouting process.

关 键 词：注浆工艺 反向分级注浆 分级隔离装置 爆破阀 

分 类 号：TD35[矿业工程—矿井建设]