三山岛金矿上覆断层赋存状态对巷道稳定性的影响
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摘要
大量工程实践表明,断层对地下巷道围岩稳定性有决定性的影响。以三山岛金矿深部主要断层F1,F2及F3为工程背景,采用数值模拟的方法研究断层倾角0°、50°、90°,水平断层分别距巷道顶板5、10、15 m,断层厚度分别为10、15、20 m等多种工况下的巷道掘进过程,对照无断层情况下的巷道稳定性,分析断层倾角、断层距巷道顶板的距离、断层的厚度对巷道围岩稳定性的影响。得出主要结论:倾角增大的过程中巷道的两帮收敛随之增大,断层厚度对巷道稳定性的影响主要体现为巷道顶板沉降的增大,断层距巷道顶板10 m的范围内,对巷道的安全掘进产生影响需要支护加固。
Large number of Engineering practices show that the influence of faults on the roadway stability is significant.Taking the main faults F1,F2 and F3 in Sanshandao Gold Mine as the engineering background,the roadway excavation process is conducted numerical simulation under the conditions of the faults with dip angle of 0°,50°,and 90°,5 m,10 m and 15 m away from roadway roof to horizontal faults,the faults with the thickness of 10 m,15 m and 20 m,the influence of fault dip angle,distance of roadway roof and faults and faults thickness on roadway stability is discussed by comparing with the roadway stability in the absence of faults.The study results show that convergence of the both sides of roadway can be increasing with the increasing of fault dip angle; the main manifestation of the influence of faults thickness on roadway stability is the subsidence increasing of roadway roof; the influence of the distance of roadway roof to fault within 10 m on safety roadway excavation is significant,therefore,some related supporting measures should be taken effectively.
Large number of Engineering practices show that the influence of faults on the roadway stability is significant.Taking the main faults F1,F2 and F3 in Sanshandao Gold Mine as the engineering background,the roadway excavation process is conducted numerical simulation under the conditions of the faults with dip angle of 0°,50°,and 90°,5 m,10 m and 15 m away from roadway roof to horizontal faults,the faults with the thickness of 10 m,15 m and 20 m,the influence of fault dip angle,distance of roadway roof and faults and faults thickness on roadway stability is discussed by comparing with the roadway stability in the absence of faults.The study results show that convergence of the both sides of roadway can be increasing with the increasing of fault dip angle; the main manifestation of the influence of faults thickness on roadway stability is the subsidence increasing of roadway roof; the influence of the distance of roadway roof to fault within 10 m on safety roadway excavation is significant,therefore,some related supporting measures should be taken effectively.
引文
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[10]闫帅,柏建彪,张自政,等.含水层上巷道过断层围岩破坏机制及控制[J].采矿与安全工程学报,2016,33(6):979-984.Yan Shuai,Bai Jianbiao,Zhang Zizheng,et al.Failure mechanism and ground control of a main entry above aquifers crossing fault zone[J].Journal of Mining&Safety Engineering,2016,33(6):979-984.
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[12]万飞,谭忠盛,马栋.关角隧道F2-1断层破碎带支护结构优化设计[J].岩石力学与工程学报,2014,33(3):531-538.Wan Fei,Tan Zhongsheng,Ma Dong.Optimizing design of support structure for Guanjiao Tunnel in fault-rupture zone F2-1[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(3):531-538.
[2]卢邦稳,刘长武,谢辉,等.不等长工作面覆岩活动及回采巷道采动影响变形规律[J].金属矿山,2016(1):34-38.Lu Bangwen,Liu Changwu,Xie Hui,et al.Law of overburden strata movement and mining roadway deformation under mining influence in the unequal length of working face[J].Metal Mine,2016(1):34-38.
[3]于泳.过大型断层巷道设计方案优化与工程实践[J].煤炭工程,2015,47(8):44-46.Yu Yong.Design and engineering practice on method of roadway crossing the faults[J].Coal Engineering,2015,47(8):44-46.
[4]王文杰.高应力区巷道卸压支护技术及应用[J].金属矿山,2010(3):23-25.Wang Wenjie.Depressurized support method and application in the development working of high stress area[J].Metal Mine,2010(3):23-25.
[5]徐前卫,程盼盼,朱合华,等.跨断层隧道围岩渐进性破坏模型试验及数值模拟[J].岩石力学与工程学报,2016,35(3):433-445.Xu Qianwei,Cheng Panpan Zhu Hehua et al.Experimental study and numerical simulation on progressive failure[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(3):433-445.
[6]姜耀东,王涛,赵毅鑫,等.采动影响下断层活化规律的数值模拟研究[J].中国矿业大学学报,2013(1):1-5.Jiang Yaodong,Wang Tao,Zhao Yixin,et al.Numerical simulation of fault activation pattern induced by coal extraction[J].Journal of China University of Mining&Technology,2013,42(1):1-5.
[7]勾攀峰,胡有光.断层附近回采巷道顶板岩层运动特征研究[J].采矿与安全工程学报,2006,23(3):285-288.Gou Panfeng,Hu Youguang.Effect of faults on movement of roof rock strata in gateway[J].Journal of Mining&Safety Engineering,2006,23(3):285-288.
[8]魏久传,高敏,张礼.断层倾角对工作面超前支承压力影响的数值模拟研究[J].煤炭技术,2014(6):135-137.Wei Jiuchuan,Gao Min,Zhang Li.Influence of fault dip angle of coal face abutment pressure numerical simulation research[J].Coal Technology,2014(6):135-137.
[9]李守国,吕进国,姜耀东,等.逆断层不同倾角对采场冲击地压的诱导分析[J].采矿与安全工程学报,2014,31(6):369-375.Li Shouguo,lu Jinguo,Jiang Yaodong,et al.Coal bump inducing rule by dip angles of thrust fault[J].Journal of Mining&Safety Engineering,2014,31(6):869-875.
[10]闫帅,柏建彪,张自政,等.含水层上巷道过断层围岩破坏机制及控制[J].采矿与安全工程学报,2016,33(6):979-984.Yan Shuai,Bai Jianbiao,Zhang Zizheng,et al.Failure mechanism and ground control of a main entry above aquifers crossing fault zone[J].Journal of Mining&Safety Engineering,2016,33(6):979-984.
[11]戎建伟.大巷过断层带加固围岩与增强支护研究[J].煤炭工程,2013(9):38-40.Rong Jianwei.Support and reinforcement research on roadway crossing faults[J].Coal Engineering,2013(9):38-40.
[12]万飞,谭忠盛,马栋.关角隧道F2-1断层破碎带支护结构优化设计[J].岩石力学与工程学报,2014,33(3):531-538.Wan Fei,Tan Zhongsheng,Ma Dong.Optimizing design of support structure for Guanjiao Tunnel in fault-rupture zone F2-1[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(3):531-538.