矿岩接触带巷道顶板变形问题研究
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摘要
为研究矿岩接触带巷道顶板变形对接触带巷道稳定性的影响,以大冶铁矿矿岩接触带巷道为研究对象,通过力学分析,建立接触带巷道顶板力学模型,推导接触带巷道顶板岩梁挠度表达式;运用FLAC3D数值模拟软件,模拟接触带巷道顶板应力分布和沉降量的变化情况;通过现场监测试验,分析接触带巷道矿岩两侧顶板累积沉降量和沉降速率的变化规律。研究表明:接触带巷道两帮应力局部集中,顶底板存在卸压现象,且顶板应力在接触带处出现波动跳跃;巷道顶板沉降显著,但位移云图变化平稳,位移影响区范围为沿巷道方向接触带前后5.00m左右;接触带巷道铁矿侧顶板累积沉降量和沉降速率均比大理岩侧小;接触带巷道大理岩侧顶板沉降速率先增大后减小,铁矿侧顶板沉降速率先增大后减小再增大再减小。
In order to analyze the influence of roadway roof deformation on the stability of contact roadway,taking the contact roadway in Daye iron mine as the research object,a mechanical model of the roof of contact roadway was established based on mechanical analysis, and the expression of the disturbance of rock beam of the roof of contact roadway was deduced.By using FLAC3 Dsoftware,the stress distribution and settlement amount of the roof of the contact zone roadway were analyzed,based on the field monitoring test,the accumulative settlement and settlement rate of the roof on both sides of the roadway in the contact zone were further analyzed. Research shows that the two groups of stress in the ore rock contact zone are concentrated locally,the roof and floor have the phenomenon of unloading,and the roof stress jumps fluctuatly in the contact zone. The roof subsidence of roadway is obvious,but the change of displacement nephogram is stable,and the range of displacement influence area is about 5. 00 m around the contact band.The cumulative settlement and settlement rate of the side roof of the contact roadway ironore are all smaller than those of the marble side.The settlement rate of the side roof of marble increases first and then decreases,and the deposition rate of the side roof of iron mine first increases,then decreases,then increases and then decreases.
In order to analyze the influence of roadway roof deformation on the stability of contact roadway,taking the contact roadway in Daye iron mine as the research object,a mechanical model of the roof of contact roadway was established based on mechanical analysis, and the expression of the disturbance of rock beam of the roof of contact roadway was deduced.By using FLAC3 Dsoftware,the stress distribution and settlement amount of the roof of the contact zone roadway were analyzed,based on the field monitoring test,the accumulative settlement and settlement rate of the roof on both sides of the roadway in the contact zone were further analyzed. Research shows that the two groups of stress in the ore rock contact zone are concentrated locally,the roof and floor have the phenomenon of unloading,and the roof stress jumps fluctuatly in the contact zone. The roof subsidence of roadway is obvious,but the change of displacement nephogram is stable,and the range of displacement influence area is about 5. 00 m around the contact band.The cumulative settlement and settlement rate of the side roof of the contact roadway ironore are all smaller than those of the marble side.The settlement rate of the side roof of marble increases first and then decreases,and the deposition rate of the side roof of iron mine first increases,then decreases,then increases and then decreases.
引文
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[13]曹铭宇,秦亚光,张杰,等.凡口铅锌矿0#采场垮塌区影响范围数值模拟[J].有色金属工程,2015,5(增1):107-112.CAO Mingyu,QIN Yaguang,ZHANG Jie,et al.Numerical simulation on collapse area scope of Fankou lead-zinc mine[J].Nonferrous Metals Engineering,2015,5(S1):107-112.
[14]张帅帅,尹土兵.基于FLAC3D的充填体内巷道稳定性分析[J].中国安全科学学报,2017,27(8):85-90.ZHANG Shuaishuai,YIN Tubing.Analysis of stability of tunnel in backfill based on FLAC3D[J].China Safety Science Journal,2017,27(8):85-90.
[15]聂韬译,浦海.深部高应力巷道劈裂破坏数值模拟研究[J].采矿与安全工程学报,2014,31(6):963-968.NIE Taoyi,PU Hai.Numerical simulation research of splitting failure of roadway under high stress[J].Journal of Mining&Safety Engineering,2014,31(6):963-968.
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[2]勾攀峰,韦四江,张盛.不同水平应力对巷道稳定性的模拟研究[J].采矿与安全工程学报,2010,27(2):143-148.GOU Panfeng,WEI Sijiang,ZHANG Sheng,et al.Numerical simulation of effect of horizontal stresses at different levels on stability of roadways[J].Journal of Mining&Safety Engineering,2010,27(2):143-148.
[3]王其虎.地下开采中接触带复合岩体非协调变形及控制研究[D].武汉:武汉科技大学,2015.WANG Qihu.Study on contact zone composite rock mass incompatible deformation and control in underground mining[D].Wuhan:Wuhan University of Science and Technology,2015.
[4]徐剑坤,朱亚飞,宋大钊,等.基于剪切梁理论的爆破扰动对巷道顶板稳定性影响研究[J].中国安全生产科学技术,2013,9(7):25-31.XU Jiankun,ZHU Yafei,SONG Dazhao,et al.Study on roadway roof stability disturbed by blasting based on shear beam theory[J].Journal of Safety Science and Technology,2013,9(7):25-31.
[5]李英明,贾安立,马念杰,等.巷道多块体岩梁顶板变形破坏过程分析[J].中国安全生产科学技术,2014,10(3):5-10.LI Yingming,JIA Anli,MA Nianjie,et al.Analysis on deformation and destruction process of multiple blocks rock beam in roadway[J].Journal of Safety Science and Technology,2014,10(3):5-10.
[6]贾后省,李国盛,翁海龙,等.巷道蝶叶塑性区顶板冒落特征与层次支护研究[J].中国安全生产科学技术,2017,13(6):20-26.JIA Housheng,LI Guosheng,WENG Hailong,et al.Study on roof fall characteristics and multi level supportin butterfly leaf plastic zone of roadway[J].Journal of Safety Science and Technology,2017,13(6):20-26.
[7]曾佑富,伍永平,来兴平,等.复杂条件下大断面巷道顶板冒落失稳分析[J].采矿与安全工程学报,2009,26(4):423-427,432.ZENG Youfu,WU Yongping,LAI Xingping,et al.Analysis of roof caving instability mechanism of large section roadway under complex conditions[J].Journal of Mining&Safety Engineering,2009,26(4):423-427,432.
[8]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.
[9]邹磊,来兴平,王宁波,等.复杂地质条件下急斜厚煤层巷道变形特征[J].西安科技大学学报,2010,30(2):145-149.ZOU Lei,LAI Xingping,WANG Ningbo,et al.Roadway deformation characteristics of steep-thick coal seam under complicated geological conditions[J].Journal of Xi'an University of Science and Technology,2010,30(2):145-149.
[10]卢雅琪.大冶铁矿接触带巷道非等时距变形量预测[D].武汉:武汉科技大学,2016.LU Yaqi.The roadway deformation prediction of unequal interval sequence in Daye iron mine contact zone[D].Wuhan:Wuhan University of Science and Technology,2016.
[11]唐礼忠,陈源,邓丽凡,等.扰动下含接触带巷道围岩力学响应及控制研究[J].铁道科学与工程学报,2016,13(2):309-315.TANG Lizhong,CHEN Yuan,DENG Lifan,et al.The mechanical response features and control of surrounding rock with contact zone under dynamic disturbance[J].Journal of Railway Science and Engineering,2016,13(2):309-315.
[12]陈赞成,余斌,解联库,等.大型地下铁矿覆岩移动破坏规律数值模拟[J].有色金属工程,2015,5(增1):101-106.CHEN Zancheng,YU Bin,XIE Lianku,et al.Numerical simulation on overlying strata movement damage rule of large underground iron mines[J].Nonferrous Metals Engineering,2015,5(S1):101-106.
[13]曹铭宇,秦亚光,张杰,等.凡口铅锌矿0#采场垮塌区影响范围数值模拟[J].有色金属工程,2015,5(增1):107-112.CAO Mingyu,QIN Yaguang,ZHANG Jie,et al.Numerical simulation on collapse area scope of Fankou lead-zinc mine[J].Nonferrous Metals Engineering,2015,5(S1):107-112.
[14]张帅帅,尹土兵.基于FLAC3D的充填体内巷道稳定性分析[J].中国安全科学学报,2017,27(8):85-90.ZHANG Shuaishuai,YIN Tubing.Analysis of stability of tunnel in backfill based on FLAC3D[J].China Safety Science Journal,2017,27(8):85-90.
[15]聂韬译,浦海.深部高应力巷道劈裂破坏数值模拟研究[J].采矿与安全工程学报,2014,31(6):963-968.NIE Taoyi,PU Hai.Numerical simulation research of splitting failure of roadway under high stress[J].Journal of Mining&Safety Engineering,2014,31(6):963-968.
[16]任建喜,孙杰龙.深埋煤矿岩石巷道围岩变形FLAC分析[J].煤炭技术,2014,33(6):72-74.REN Jianxi,SUN Jielong.Analysis of surrounding rock deformation of deeply buried mine roadways based on FLAC[J].Coal Technology,2014,33(6):72-74.