基于精密探测的金属矿山采空区群稳定性分析
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摘要
采空区群的稳定性分析是一个复杂的地质问题,而在区域内存在一种群效应。准确地掌握采空区群的三维形态和空间的相对位置是进行稳定性分析的前提。以石人沟铁矿为背景,利用空区探测系统(CMS)对采空区进行了精密探测,并对探测数据进行处理和转换,在此基础上,应用3Dmine建立了采空区群的三维空间模型,经过进一步处理实现了与FLAC3D的耦合,建立了三维数值计算模型。根据计算结果对采空区群区域的应力场、位移场进行了分析,对群区域内的群效应进行了阐述。在此基础上对群区域地表位移进行了分析,确定了地表最大位移面积和采空区水平面积的比值。研究结果表明,区域内的群效应使应力和位移较单个采空区时都有了较大增加,且增加幅度并不是单纯的叠加,这种效应加剧了采空区的危险等级,将CMS、3Dmine和FLAC3D三者的优势结合起来,为采空区群得稳定性分析提供了一个准确而有效的途径。
Stability analysis of goaf group is a complicated geological problem;there is some "group effect".An accurate grasp of cavity shape,size and its change is the premise to this problem.In the engineering background of Shirengou iron mine,using the cavity monitoring system(CMS) to detect the goaf group precisely.Then the cavity model and geological model of the mine are constructed using the 3Dmine software based on the detection results.A method of constructing numerical computing model with the coupling of 3Dmine and FLAC3D is put forward.The stress and strain fields are analyzed according to the simulation calculation results;and the "group effect" is discussed.The research results show that the "group effect" increases the stress and strain larger than the single goaf;and this effect is not only simple addition but improve the goaf's hazard grade.This paper combinates the advantages of CMS,3Dmine and FLAC3D,and provides a new and effective way for numerical simulation research on the stability of rock engineering.
Stability analysis of goaf group is a complicated geological problem;there is some "group effect".An accurate grasp of cavity shape,size and its change is the premise to this problem.In the engineering background of Shirengou iron mine,using the cavity monitoring system(CMS) to detect the goaf group precisely.Then the cavity model and geological model of the mine are constructed using the 3Dmine software based on the detection results.A method of constructing numerical computing model with the coupling of 3Dmine and FLAC3D is put forward.The stress and strain fields are analyzed according to the simulation calculation results;and the "group effect" is discussed.The research results show that the "group effect" increases the stress and strain larger than the single goaf;and this effect is not only simple addition but improve the goaf's hazard grade.This paper combinates the advantages of CMS,3Dmine and FLAC3D,and provides a new and effective way for numerical simulation research on the stability of rock engineering.
引文
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[13]宋卫东,杜建华,尹小鹏,等.金属矿山崩落法开采顶板围岩崩落机理与塌陷规律[J].煤炭学报,2010,(7):1078-1083.SONG Wei-dong,DU Jian-hua,YIN Xiao-peng,et al.Caving mechanism of hangingwall rock and rules ofsurface subsidence due to no-pillar sub-level cavingmethod in an iron mine[J].Journal of China CoalSociety,2010,(7):1078-1083.
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[15]刘科伟,李夕兵,宫凤强,等.基于CALS及Surpac-FLAC3D耦合技术的复杂空区稳定性分析[J].岩石力学与工程学报,2008,27(9):1924-1931.LIU Ke-wei,LI Xi-bing,GONG Feng-qiang,et al.Stability analysis of complicated cavity based on calsand coupled Surpac-FLAC3D technology[J].ChineseJournal of Rock Mechanics and Engineering,2008,27(9):1924-1931.
[2]初明祥,王清标,夏均民.采空侧巷道底鼓形成机制与防治技术研究[J].岩土力学,2011,32(增2):413-417.CHU Ming-xiang,WANG Qing-biao,XIA Jun-min.Study of formation mechanism of floor heave at goaf sideof roadway and prevention technology[J].Rock and SoilMechanics,2011,32(Supp.2):413-417
[3]廖秋林,曾钱帮.基于ANSYS平台复杂地质体FLAC3D模型的自动生成[J].岩石力学与工程学报,2005,24(6):1010-1013.LIAO Qiu-lin,ZENG Qian-bang.Automatic modelgeneration of complex geologic body with FLAC3Dbasedon ANSYS Platform[J].Chinese Journal of RockMechanics and Engineering,2005,24(6):1010-1013.
[4]谢和平,陈忠辉,周宏伟,等.基于工程体和地质体相互作用的两体力学模型初探[J].岩石力学与工程学报,2005,24(9):1457-1464.XIE He-ping,CHEN Zhong-hui,ZHOU Hong-wei,et al.Study of two-body mechanical model based on interactionbetween structural body and geo-body[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(9):1457-1464.
[5]朱维申,李晓静,郭彦双,等.地下大型洞室群稳定性的系统性研究[J].岩石力学与工程学报,2004,23(10):1689-1693.ZHU Wei-shen,LI Xiao-jing,GUO Yan-shuang,et al.Systematic study of stability of large undergroundhouses[J].Chinese Journal of Rock Mechanics andEngineering,2004,23(10):1689-1693.
[6]刘军,王迪.GPS-3D技术在采空区探测中的集成化应用[J].金属矿山,2009,11(增刊):512-515.LIU Jun,WANG Di.Study of similar material forsimulation of mining effect of rock mass at fault zone[J].Metal Mine,2009,11(Supp.):512-515.
[7]朱泽奇,盛谦,冷先伦等.大型地下洞室群关键块体地震响应分析[J].岩土力学,2010,31增(2):254-259,264.ZHU Ze-qi,SHENG Qian,LENG Xian-lung,et al.Studyof seismic response of key block in large undergroundopening group[J].Rock and Soil Mechanics,2010,31(supper 1):254-259,264.
[8]赵国彦.金属矿隐伏采空区探测及其稳定性预测理论研究[博士论文D].长沙:中南大学,2010.
[9]过江,古德生,罗周全.金属矿山采空区3-D激光探测新技术[J].矿冶工程.2006,26(5):16-19.GUO Jiang,GU De-sheng,LUO Zhou-quan.A newtechnique of 3-D laser survey of finished stopes in metalmines[J].Mining and Metallurgical Engineering,2006,26(5):16-19.
[10]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,2008,28(增刊):521-526.LIU Xiao-ming,LUO Zhou-quan,YANG Cheng-xiang,et al.Analysis of stability of cavity based on cavitymonitoring[J].Rock and Soil Mechanics,2008,28(Supp.):521-526.
[11]寇向宇,贾明涛,王李管,等.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,WANG Li-guan,et al.Evaluation and analysis of stability of mined-out areabased on the CMS and Dimine-Flac3D coupling techni-que[J].Mineral Engineering Research,2010,25(1):31-35.
[12]罗周全,刘晓明,吴亚斌,等.基于Surpac和Phase-2耦合的采空区稳定性模拟分析[J].辽宁工程技术大学学报(自然科学版),2008,27(4):485-488.LUO Zhou-quan,LIU Xiao-ming,WU Ya-bin.Study oncavity stability numerical simulation based on coupling ofSurpac and Phase-2[J].Journal of Liaoning TechnicalUniversity(Natural Science),2008,27(4):485-488.
[13]宋卫东,杜建华,尹小鹏,等.金属矿山崩落法开采顶板围岩崩落机理与塌陷规律[J].煤炭学报,2010,(7):1078-1083.SONG Wei-dong,DU Jian-hua,YIN Xiao-peng,et al.Caving mechanism of hangingwall rock and rules ofsurface subsidence due to no-pillar sub-level cavingmethod in an iron mine[J].Journal of China CoalSociety,2010,(7):1078-1083.
[14]OPTECH.Cavity monitoring system wireless usermanual[M].Canada:Optech System Corporate,2004.
[15]刘科伟,李夕兵,宫凤强,等.基于CALS及Surpac-FLAC3D耦合技术的复杂空区稳定性分析[J].岩石力学与工程学报,2008,27(9):1924-1931.LIU Ke-wei,LI Xi-bing,GONG Feng-qiang,et al.Stability analysis of complicated cavity based on calsand coupled Surpac-FLAC3D technology[J].ChineseJournal of Rock Mechanics and Engineering,2008,27(9):1924-1931.
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