新元煤矿胶带大巷围岩变形与注浆加固技术
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摘要
针对新元煤矿南区集中胶带大巷两帮与底板严重变形的难题,利用窥视仪对大巷帮部及底板围岩进行观察,分析大巷周围煤岩体破坏情况以及发生破坏变形的原因,基于原支护方案提出注浆+强力锚索组合加固技术,并阐述其加固机理。监测结果显示:注浆+强力锚索组合加固技术有效控制了两帮与底板的变形,两帮最大移近量为104mm,底板最大移近量为85mm,避免了大巷在生产期间的反复支护与修复。
In the main roadway with concentrated belt of the southern area of Xinyuan Coal Mine,serious deformation of two sidewalls and floor occurred.To solve the problem,borehole imaging tool was used to observe the surrounding rock of the sidewalls and floor in order to study the coal rock damage around the main roadway and the causes of the deformation.Based on the original support scheme,the grouting and intensive cable reinforcement technology was proposed and the reinforcement mechanism was expounded.The results show that grouting and intensive cable technology could effectively control the deformation of the two sidewalls and the floor.The maximum wall-to-wall convergence is 104 mm and the maximum floor convergence is 85 mm,which could avoid repeated supporting and repairing of the main roadway in the process of production.
In the main roadway with concentrated belt of the southern area of Xinyuan Coal Mine,serious deformation of two sidewalls and floor occurred.To solve the problem,borehole imaging tool was used to observe the surrounding rock of the sidewalls and floor in order to study the coal rock damage around the main roadway and the causes of the deformation.Based on the original support scheme,the grouting and intensive cable reinforcement technology was proposed and the reinforcement mechanism was expounded.The results show that grouting and intensive cable technology could effectively control the deformation of the two sidewalls and the floor.The maximum wall-to-wall convergence is 104 mm and the maximum floor convergence is 85 mm,which could avoid repeated supporting and repairing of the main roadway in the process of production.
引文
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[3]谢和平,高峰,鞠杨.深部岩体力学研究与探索[J].岩石力学与工程学报,2015,34(11):2161-2178.
[4]袁亮,薛俊华,刘泉声,等.煤矿深部岩巷围岩控制理论与支护技术[J].煤炭学报,2011,36(4):535-543.
[5]康红普.深部煤矿应力分布特征及巷道围岩控制技术[J].煤炭科学技术,2013,41(9):12-17.KANG Hongpu.Stress Distribution Characteristics and Strata Control Technology for Roadways in Deep Coal Mines[J].Coal Science and Technology,2013,41(9):12-17.
[6]谢生荣,郜明明,陈冬冬,等.大巷穿采空区时锚网喷与组合框架联合支护技术[J].采矿与安全工程学报,2017,34(4):698-706.XIE Shengrong,GAO Mingming,CHEN Dongdong,et al.The Combined Support Technology of Bolt-mesh-shotcrete and Composite Frame During Main Roadway Crossing Goaf[J].Journal of Mining and Safety Engineering,2017,34(4):698-706.
[7]杨学师.辛置煤矿深埋藏巷道变形分析及支护技术研究[J].能源与节能,2016(11):171-172,174.YANG Xueshi.Deformation Analysis of Deep Buried Roadway and Research on Supporting Technology in Xinzhi Coal Mine[J].Energy and Conservation,2016(11):171-172,174.
[8]信晓东,郭春颖,刘军柱.六道湾煤矿矿区地表变形成因分析[J].煤矿安全,2010,41(3):100-102.
[9]陈晓祥,勾攀峰,范增哲,等.深井高应力高突区域回采巷道变形特征及控制[J].采矿与安全工程学报,2013,30(3):363-368.CHEN XiaoXiang,GOU Panfeng,FAN Zengzhe,et al.Deformation Characteristics and Controlling of Tailgate in High Stress High Gas and Outburst Region of Deep Mine[J].Journal of Mining and Safety Engineering,2013,30(3):363-368.
[10]张强.破碎围岩巷道支护研究[J].山西煤炭,2015,35(1):41-44.ZHANG Qiang.Roadway Supporting Study in Roadways with Broken Surrounding Rock[J].Shanxi Coal,2015,35(1):41-44.
[11]康红普,吴拥政,何杰,等.深部冲击地压巷道锚杆支护作用研究与实践[J].煤炭学报,2015,40(10):2225-2233.KANG Hongpu,WU Yongzheng,HE Jie,et al.Rock Bolting Performance and Field Practice in Deep Rroadway with Rock Burst[J].Journal of China Coal Society,2015,40(10):2225-2233.