基于CALS及Surpac-FLAC^3D耦合技术的复杂空区稳定性分析  

STABILITY ANALYSIS OF COMPLICATED CAVITY BASED ON CALS AND COUPLED SURPAC-FLAC～3D TECHNOLOGY

作　　者：刘科伟[1,2] 李夕兵[1,2] 宫凤强[1,3] 刘希灵[1,2] 王卫华[1,2] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]中南大学深部金属矿产开发与灾害控制湖南省重点实验室,湖南长沙410083 [3]Le Laboratoire de Mécanique des Roches, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH - 1015, Suisse

出　　处：《岩石力学与工程学报》2008年第9期1924-1931,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重大项目(50490274);“十一五”国家科技支撑计划(2007BAK24B01-4);中南大学研究生学位论文创新选题资助项目(1343-77238);湖南省研究生学位创新项目(1343-4236000013)

摘　　要：由于受地质条件和探测技术的限制,传统探测方法很难获得复杂空区精确的实际空间分布形状,由此得到的空区用于建立数值分析模型显得过于粗糙,在此基础上进行空区稳定性分析的可靠性程度不高。采用空区激光自动扫描系统(CALS)对复杂空区进行激光扫描,在获得精准三维点云数据的基础上,运用Surpac软件模拟出空区的三维地质模型,通过耦合方法可以在FLAC3D中生成与实际空区空间分布一致的数值模型,提高复杂空区稳定性计算的准确性和可靠性。选取三道庄露天矿的地下空区作为工程实例,利用CALS获得不规则空区的实际空间边界。在此基础上,运用Surpac进行三维块体模拟,研究Surpac与FLAC3D模型耦合技术,成功地将三维模型数据导入FLAC3D中,结合现场实际勘测的围岩力学参数,对空区进行静力计算,分析空区的稳定性。Under the restriction of geological conditions and detection technology, accurate data of real space shape of complicated cavity are very difficult to obtain with conventional detection methods. The cavity data detected by these methods are so rough for building model in numerical analysis; and high reliability of stability analysis based on the model can not be reached. Therefore, 3D laser scanning for complicated cavity with cavity auto scanning laser system（CALS） is put forward. This system is capable of being inserted into voids and cavities via predrilled borehotes to quickly and safely survey old workings; after exact 3D point cloud data are obtained by using CALS, the data can be processed so as to accurately simulate 3D geological model of the cavity in Surpac software, and then, adopting coupled Surpac-FLAC^3D technology, numerical analysis model with real space shape of the cavity is created in FLAC^3D, and the stability calculation is conducted in the final phase. Selecting the underground cavity of Sandaozhuang open-pit mine as an example, real space boundary of the irregularly cavity is scanned and 3D block model of the surrounding rock is modelled using the method mentioned above; following that, coupled Surpac-FLAC^3D technology has been studied and 3D model data is successfully introduced into FLAC^3D software; combining mechanical parameters of surrounding rock based on field tests and other geological conditions, static calculation is performed. According to the calculation results, stability of the cavity is analysed referring to the nephogram of stress and displacement of the surrounding rock, and the accuracy and reliability of the analysis results are greatly improved.

关 键 词：采矿工程 复杂空区稳定性 空区激光自动扫描系统(CALS) 耦合 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]