基于实测的复杂采空区稳定性分析
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摘要
结合某铁矿采空区的实际情况,采用空区三维激光探测系统对采空区进行了探测,准确掌握了采空区的三维形态和空间位置,为采空区稳定性数值模拟分析奠定了基础。并运用3DMine软件建立采空区三维模型和矿区地学三维模型,提出采用数据转换的耦合模式将3DMine与Flac3D耦合构建数值计算模型进行数值模拟计算,根据模拟计算结果对采空区的围岩稳定性进行了分析,结果表明,矿体被开挖以后,由于围岩应力重分布,空区顶板及侧壁围岩处于较明显的拉应力状态,空区围岩位移以顶板Z向位移为主,矿柱侧向位移不明显,但空区围岩的塑性分布范围较广,主要集中在空区的顶板及底板,而矿柱顶部的塑性分布将会导致矿柱塑性变形失稳,对所测采空区的稳定性产生很大的影响。
The basic components,principle and monitoring way of CMS are introduced. The key to the cavity stability numerical simulation is to grasp the shape,size of cavity,on the basis of the actual situation of iron mine,the cavity model and geological model of the mine are constructed by using 3DMine software based on CMS. A method of constructing numerical computing model with the coupling of 3DMine and Flac3D is put forward. The simulation calculation is carried out. The stability of surrounding rock of the cavity is analyzed according to the simulation calculation results. Results indicates that the cavity roof and wall rock is in more apparent tensile stress state with the reason of the redistribution of surrounding rock stress after excavation. The roof central displacements are larger than the pillar lateral displacements,plastic zones are distributed to varying degrees in the cavity roof,floor and pillars,especially distributed in the pillars,showing that the cavity surrounding rock is in poor stability and the cavity is in instability.
The basic components,principle and monitoring way of CMS are introduced. The key to the cavity stability numerical simulation is to grasp the shape,size of cavity,on the basis of the actual situation of iron mine,the cavity model and geological model of the mine are constructed by using 3DMine software based on CMS. A method of constructing numerical computing model with the coupling of 3DMine and Flac3D is put forward. The simulation calculation is carried out. The stability of surrounding rock of the cavity is analyzed according to the simulation calculation results. Results indicates that the cavity roof and wall rock is in more apparent tensile stress state with the reason of the redistribution of surrounding rock stress after excavation. The roof central displacements are larger than the pillar lateral displacements,plastic zones are distributed to varying degrees in the cavity roof,floor and pillars,especially distributed in the pillars,showing that the cavity surrounding rock is in poor stability and the cavity is in instability.
引文
[1]王蓬,马志鹏.复杂条件下厚煤层回采巷道围岩动态变形规律研究[J].西安科技大学学报,2010,30(5):613-618.WANG Peng,MA Zhi-peng.Dynamic deformation law of surrounding rock of mining roadway in complex thick coal seam[J].Journal of Xi’an University of Science and Technology,2010,30(5):613-618.
[2]宋卫东,徐文彬,万海文,等.大阶段嗣后充填采场围岩破坏规律及其巷道控制技术[J].煤炭学报,2011,36(2):287-292.SONG Wei-dong,XU Wen-bin,WAN Hai-wen,et al.Failure rules of surrounding rock in stope and controlling techniques for roadway of high-stage backfilling method[J].Journal of China Coal Society,2011,36(2):287-292.
[3]闫光准,杨相海.崔家沟软岩巷道变形破坏机理及支护研究[J].西安科技大学学报,2010,30(5):548-551.YAN Guang-zhun,YANG Xiang-hai.Support and deformation failure mechanism of soft rock roadway in Cuijiagou coal mine[J].Journal of Xi’an University of Science and Technology,2010,30(5):548-551.
[4]罗周全,吴亚斌,刘晓明,等.基于SURPAC的复杂地质体FLAC3D模型生成技术[J].岩土力学,2008,29(5):1 334-1 338.LUO Zhou-quan,WU Ya-bin,LIU Xiao-ming,et al.FLAC3D modeling for complex geologic body based on SURPAC[J].Rock and Soil Mechanics,2008,29(5):1 334-1 338.
[5]寇向宇,贾明涛.基于CMS及DIMINE-FLAC3D耦合技术的采空区稳定性分析与评价[J].矿业工程研究,2010,25(1):31-35.KOU Xiang-yu,JIA Ming-tao.Evaluation and analysis of stability of mined-out area based on the CMS and DIMINEFLAC3D coupling technique[J].Mineral Engineering Research,2010,25(1):31-35.
[6]林杭,曹平,李江腾,等.基于SURPAC的FLAC3D三维模型自动构建[J].中国矿业大学学报,2008,37(3):339-342.LIN Hang,CAO Ping,LI Jiang-teng,et al.Automatic generation of FLAC3D model Based on SURPAC[J].Journal of China University of Mining&Technology,2008,37(3):339-342.
[7]李夕兵,李地元,赵国彦.金属矿地下采空区探测、处理与安全评判[J].矿山压力与顶板管理,2006,23(1):24-29.LI Xi-bing,LI Di-yuan,ZHAO Guo-yan.Detecting disposal and safety evaluation of the underground goaf in metal mines[J].Journal of Mining&Safety Engineering,2006,23(1):24-29.
[8]张娇,姜谙男,易南概.东坪金矿采空区开挖过程的三维有限元数值模[J].中国矿业,2006,15(11):81-84.ZHANG Jiao,JIANG An-nan,YI Nan-gai.Numerical simulation of excavation process of Dongping mine worked out area based on 3D-finite element method[J].China Mining Magazine,2006,15(11):81-84.
[9]钟刚,韩方建.平水铜矿采空区稳定性数值分析[J].金属矿山,2004(3):8-11.ZHONG Gang,HAN Fang-jian.Numerical analysis of stability of mined area in Pingshui Copper Mine[J].Metal Mine,2004(3):8-11.
[10]Cavity monitoring system operation manual[M].Canada:Optech System Corporation,2008.
[2]宋卫东,徐文彬,万海文,等.大阶段嗣后充填采场围岩破坏规律及其巷道控制技术[J].煤炭学报,2011,36(2):287-292.SONG Wei-dong,XU Wen-bin,WAN Hai-wen,et al.Failure rules of surrounding rock in stope and controlling techniques for roadway of high-stage backfilling method[J].Journal of China Coal Society,2011,36(2):287-292.
[3]闫光准,杨相海.崔家沟软岩巷道变形破坏机理及支护研究[J].西安科技大学学报,2010,30(5):548-551.YAN Guang-zhun,YANG Xiang-hai.Support and deformation failure mechanism of soft rock roadway in Cuijiagou coal mine[J].Journal of Xi’an University of Science and Technology,2010,30(5):548-551.
[4]罗周全,吴亚斌,刘晓明,等.基于SURPAC的复杂地质体FLAC3D模型生成技术[J].岩土力学,2008,29(5):1 334-1 338.LUO Zhou-quan,WU Ya-bin,LIU Xiao-ming,et al.FLAC3D modeling for complex geologic body based on SURPAC[J].Rock and Soil Mechanics,2008,29(5):1 334-1 338.
[5]寇向宇,贾明涛.基于CMS及DIMINE-FLAC3D耦合技术的采空区稳定性分析与评价[J].矿业工程研究,2010,25(1):31-35.KOU Xiang-yu,JIA Ming-tao.Evaluation and analysis of stability of mined-out area based on the CMS and DIMINEFLAC3D coupling technique[J].Mineral Engineering Research,2010,25(1):31-35.
[6]林杭,曹平,李江腾,等.基于SURPAC的FLAC3D三维模型自动构建[J].中国矿业大学学报,2008,37(3):339-342.LIN Hang,CAO Ping,LI Jiang-teng,et al.Automatic generation of FLAC3D model Based on SURPAC[J].Journal of China University of Mining&Technology,2008,37(3):339-342.
[7]李夕兵,李地元,赵国彦.金属矿地下采空区探测、处理与安全评判[J].矿山压力与顶板管理,2006,23(1):24-29.LI Xi-bing,LI Di-yuan,ZHAO Guo-yan.Detecting disposal and safety evaluation of the underground goaf in metal mines[J].Journal of Mining&Safety Engineering,2006,23(1):24-29.
[8]张娇,姜谙男,易南概.东坪金矿采空区开挖过程的三维有限元数值模[J].中国矿业,2006,15(11):81-84.ZHANG Jiao,JIANG An-nan,YI Nan-gai.Numerical simulation of excavation process of Dongping mine worked out area based on 3D-finite element method[J].China Mining Magazine,2006,15(11):81-84.
[9]钟刚,韩方建.平水铜矿采空区稳定性数值分析[J].金属矿山,2004(3):8-11.ZHONG Gang,HAN Fang-jian.Numerical analysis of stability of mined area in Pingshui Copper Mine[J].Metal Mine,2004(3):8-11.
[10]Cavity monitoring system operation manual[M].Canada:Optech System Corporation,2008.