露天转地下开采对上覆构筑物安全影响分析
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摘要
为在最大限度科学回收地下资源的前提下,保证地表构筑物安全,以国内某大型矿山为工程背景,采用空区监测系统(CMS)结合DIMINE/FLAC3D建模技术,构建露天转地下开采对地表构筑物影响分析三维可视化计算模型。通过数值计算与现场调查相结合的方法,对比分析露天转地下开采影响范围内的地表构筑物水平位移、倾斜、曲率、沉降。结果表明:数值计算获得的应力场和位移场结果,与矿山实测结果基本吻合。该矿山开采1 650 m阶段后监测点最大倾斜指标为9 mm/m,接近允许值上限,因此,其最大合理开采深度为1 650 m阶段。
In order to ensure surface structures safety on the premise that underground resources can be exploited fully and scientifically,a certain mine in China was taken as the engineering background,a model was built for analyzing effects of open pit to underground mining on surface structures safety,by using CMS and DIMINE / FLAC3 Dmodelling technology. Horizontal displacements,tilts,curvatures and subsides of surface structures in the affected sphere were studied. The results show that stress field and displacement field obtained by numerical calculation are consistent with the measured results,that maximum tilt indicator value for monitoring points is 9 mm / m after the ore of 1 650 m was mined,and that maximum rational mining depth is 1 650 m.
In order to ensure surface structures safety on the premise that underground resources can be exploited fully and scientifically,a certain mine in China was taken as the engineering background,a model was built for analyzing effects of open pit to underground mining on surface structures safety,by using CMS and DIMINE / FLAC3 Dmodelling technology. Horizontal displacements,tilts,curvatures and subsides of surface structures in the affected sphere were studied. The results show that stress field and displacement field obtained by numerical calculation are consistent with the measured results,that maximum tilt indicator value for monitoring points is 9 mm / m after the ore of 1 650 m was mined,and that maximum rational mining depth is 1 650 m.
引文
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[16]陈娇,罗周全,侯造水.空区探测方法优选的ANP模型及其应用[J].中国安全科学学报,2012,22(12):96-102.CHEN Jiao,LUO Zhou-quan,HOU Zao-shui.An ANP-based analytical model for selecting the best cavity probing method and its application[J].China Safety Science Journal,2012,22(12):96-102.
[2]张钦礼,罗怡波,柯愈贤.露天转地下开采地表沉降安全性分析[J].中南大学学报:自然科学版,2013,44(8):3 441-3 445.ZHANG Qin-li,LUO Yi-bo,KE Yu-xian.Security for ground settlement of translation from open pit to underground mining[J].Journal of Central South University:Science and Technology,2013,44(8):3 441-3 445.
[3]陈雨,张振文,张彦敏.基于概率积分法的地面沉陷灾害预测[J].辽宁工程技术大学学报,2007,26(增):143-145.CHEN Yu,ZHANG Zhen-wen,ZHANG Yan-min.Disaster prediction of surface subsidence based on probability integration[J].Journal of Liaoning Technical University,2007,26(S):143-145.
[4]郑彬,郭文兵,桑培淼,等.我国开采沉陷动态过程的研究现状与展望[J].现代矿业,2009,25(3):11-14.ZHENG Bin,GUO Wen-bing,SANG Pei-miao,et al.Research status and prospect of study on dynamic of mining subsidence in China[J].Morden Mining,2009,25(3):11-14.
[5]穆伟刚,孙世国,冯少杰.地下开采诱发地表沉降预测方法的研究[J].金属矿山,2010(10):10-12.MU Wei-gang,SUN Shi-guo,FENG Shao-jie.Prediction methods of the surface subsidence induced by underground mining[J].Metal Mine,2010(10):10-12.
[6]刘晓明,罗周全,杨承祥,等.基于实测的采空区稳定性数值模拟分析[J].岩土力学,2007,28(8):521-526.LIU Xiao-ming,LUO Zhou-quan,YANG Cheng-xiang,et al.Analysis of stability of cavity based on cavity monitoring[J].Rock and Soil Mechnics,2007,28(8):521-526.
[7]戴兴国,黄毅,白瑛.基于CMS及DIMINE的矿柱回采爆破设计优化[J].武汉理工大学学报,2013,37(1):15-22.DAI Xing-guo,HUANG Yi,BAI Ying.Optimization of blasting design for ore pillar extraction based on CMS and DIMINE[J].Journal of Wuhan University of Technology,2013,37(1):15-22.
[8]房智恒,王李管,熊张友.基于Micromin-FLAC3D耦合技术的金属矿采矿扰动影响分析[J].采矿与安全工程学报,2012,29(6):870-875.FANG Zhi-heng,WANG Li-guan,XIONG Zhang-you.Mining disturbance analysis in metal mine based on MicromineFLAC3Dcoupling technology[J].Journal of Mining&Safety Engineering,2012,29(6):870-875.
[9]王纯祥,白世伟.三维地层信息系统与有限元方法集成研究[J].岩石力学与工程学报,2004,23(21):3 695-3 699.WANG Chun-xiang,BAI Shi-wei.Study on integration of 3D strata information system and FEM[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3 695-3 699.
[10]侯恩科,吴立新,李建民,等.三维地学模拟与数值模拟的耦合方法研究[J].煤炭学报,2002,27(4):388-392.HOU En-ke,WU Li-xin,LI Jian-min,et al.Study of the coupling of 3D geoscience modeling with numerical simulation[J].Journal of China Coal Society,2002,27(4):388-392.
[11]李春开,庞明勇.基于八叉树的四面体网格生成算法[J].微计算机信息,2010,26(8):174-175.LI Chun-kai,PANG Ming-yong.An algorithm for generating tetrahedral mesh based on octree[J].Microcomputer Information,2010,26(8):174-175.
[12]张富民,潘燮,常林彝,等.采矿设计手册[M].北京:中国建筑工业出版社,1989:874-912.ZHANG Fu-min,PAN Xie,CHANG Lin-yi,et al.Mining design manual[M].Beijing:China Building Industry Press,1989:874-912.
[13]于广明,杨伦,王忠林.砖石结构建筑物破坏等级划分方法新探[J].阜新矿业学院学报:自然科学版,1993,12(2):41-45.YU Guang-ming,YANG Lun,WANG Zhong-lin.Inquiry into the dividing of the damage category of brick-stone buildings[J].Journal of Fuxin Mining Institution:Natural Science,1993,12(2):41-45.
[14]刘书贤,魏晓刚,张弛,等.煤矿多煤层重复采动所致地表移动与建筑损坏分析[J].中国安全科学学报,2014,24(3):59-65.LIU Shu-xian,WEI Xiao-gang,ZHANG Chi,et al.Analysis of construction damage and surface movement caused by repeat multiple seam mining of coal mine[J].China Safety Science Journal,2014,24(3):59-65.
[15]汪伟,罗周全,王益伟,等.金属矿山采空区危险性辨识的遗传BP模型研究[J].中国安全科学学报,2013,23(2):39-44.WANG Wei,LUO Zhou-quan,WANG Yi-wei,etal.Study on genetic BP model for identifying metal mine goaf danger[J].China Safety Science Journal,2013,23(2):39-44.
[16]陈娇,罗周全,侯造水.空区探测方法优选的ANP模型及其应用[J].中国安全科学学报,2012,22(12):96-102.CHEN Jiao,LUO Zhou-quan,HOU Zao-shui.An ANP-based analytical model for selecting the best cavity probing method and its application[J].China Safety Science Journal,2012,22(12):96-102.