CMS实测地下矿采空区建模及稳定性分析研究*

传统的采空区稳定性分析建立的数值分析模型，对空区的形状进行过多的简化，使得建立的空区模型过于简单，稳定性分析的结果可靠性较差。借助三维激光空区监测系统对地下矿山采空区进行三维扫描，精确的获取激光头到空区边界的距离。将全站仪测量的定位点坐标输入到CMSposprocess处理软件，将生成的数据输入到矿业工程软件3Dmine中建立起空区的实际赋存模型。研究用VC++编写出可以将3Dmine软件输出的块体质心点坐标直接导入有限差分软件FLAC3D中的应用程序，从而建立起空区力学模型，形成从实测模型到力学计算模型的新方法，大大提高了采空区稳定性分析的准确性和可靠性。结合石人沟铁矿空区稳定性分析工程实践，对石人沟铁矿-60 m水平南区空区进行静力计算，分析空区稳定性，获得了良好效果。

Modeling and Stability Analysis of the Mined-Out Area in Underground Mine by CMS

The numerical analysis models in the conventional stability analysis of mined-out area have over-simplified the shape of mined-out area, leading to too simple models and a poor reliability of the stability analysis results.CMS (Cavity Monitoring System) was used to make a 3D scanning of the mined-out area in underground mine and accurately get the distance from the laser head to the boundary of mined-out area.The positioning point coordinates of total station survey were entered into the CMSPosProcess software and the generated data into 3Dmine software to build the real occurrence model of mined-out area.A study was made to use VC++ to program an application for a direct input of the block centroid coordinates output from the 3Dmine into FLAC3D so as to establish a mechanical model of mined-out area, forming a new method from a practically measurement model to a mechanical calculation model, greatly improving the accuracy and reliability of the stability analysis of mined-out area.Good results were achieved in the static calculation and the stability analysis of the mined-out area in the south branch mining area at -60 m level in Shirengou Iron Mine.