摘要
针对金川三矿区深部破碎围岩巷道支护工程中施工工艺复杂、支护成本高的问题,以三矿区深部破碎围岩巷道为研究对象,建立了双层喷锚网和单层喷锚网+钢筋条支护方式数值计算模型,对比分析了不同支护方案下的围岩塑性区、围岩变形量、支护锚杆受力、围岩安全区域。结果表明,单层喷锚网+钢筋条支护能达到双层喷锚网支护效果;支护试验巷道变形监测表明单层喷锚网+钢筋条支护下的顶板变形量略大于双层喷锚网,但两帮的变形量则小于双层喷锚网,且试验巷道都没有发生破坏;数值模拟和现场试验均表明,在三矿区一定条件下采用单层喷锚网+钢筋条支护方式替代原双层喷锚网支护方式是完全可行的,满足现场正常生产的要求。
Aiming at the problems of complex construction technology and high support cost in the support engineering of deep broken surrounding rock roadway in Jinchuan No.3 mining area,taking the deep broken surounding rock roadway in No.3 mining area as the research object,the numerical calculation models of double-layer spray anchor net and single-layer spray anchor net+steel bar support mode were established.The plastic zone of surrounding rock,deformation of surrounding rock,stress of supporting bolt and safety zone of surrounding rock under different support schemes were compared and analyzed.The results show that the single-layer spray anchor net+steel bar support can achieve the double-layer spray anchor net support effect.The deformation monitoring of the supporting test roadway shows that the deformation of the roof under the support of single-layer spray anchor net+steel bar is slightly larger than that of the double-layer spray anchor net,but the deformation of the two sides is smaller than that of the double-layer spray anchor net,and the test roadway is not damaged.Numerical simulation and field test show that it is completely feasible to replace the original double-layer spray anchor net support mode with single-layer spray anchor net+steel bar support mode under certain conditions in Jinchuan No.3 mining area,which can meet the requirements of on-site normal production.
作者
刘超
黄永祥
王文杰
张鹏强
毛文新
LIU Chao;HUANG Yongriang;WANG Wenjie;ZHANG Pengqiang;MAOWenzin(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;The No.3 mining area of Jinchuan Group Co.,Ltd.,Jinchang,Gansu 737101,China;Jinchuan Nickel Cobalt Research and Design Institute,Jinchang,Gansu 737102,China)
出处
《矿业研究与开发》
CAS
北大核心
2023年第10期67-73,共7页
Mining Research and Development
基金
国家自然科学基金资助项目(51974206)
湖北省安全生产专项资金科技项目(KJZX202007007)。
关键词
破碎围岩巷道
双层喷锚网支护
单层喷锚网+钢筋条支护
低成本支护
Broken surrounding rock roadway
Double-layer spray anchor net support
Single-layer spray anchor net+Steel bar support
Low-cost support
