基于C-ALS数据点云与FLAC^(3D)耦合建模采空区稳定性研究

Stability Analysis of Goaf Based on C-ALS Data Point Cloud and FLAC^(3D) Coupled Modeling

采空区坍陷地质灾害严重威胁矿山安全生产,如何有效地探知采空区的空间位置和三维形态等相关信息,并建立其三维可视化模型是有效实现采空区安全管理和评价的重要基础性工作之一。以滦平县张百湾镇周台子铁矿三采区的隐伏采空区稳定性分析为例,通过对采空区钻探后采用C-ALS三维激光扫描获取数据点云并构建三维可视化模型,以FISH语言编写转换程序导入到FLAC^(3D),进行了采空区地压分布规律、变形分布特征、围岩破坏情况、地表沉降分布特征分析,并与现场采空区实际情况相吻合,说明C-ALS数据点云与FLAC^(3D)耦合建模的技术方法在获取采空区的三维特征信息及采空区的稳定性判断方面的可行性,可为类似采空区的安全管理评价和稳定性分析提供技术参考。

The geological disaster of mined-out area collapse seriously threatens the safe production of mine,how to effectively detect the space position of the mined-out area and three-dimensional form and other related information,as well as build the 3D visualization model is an effective implement one of the important basic work of safety management and evaluation of mined-out area.The stability analysis of concealed mined-out area in no.3 mining area of Zhoutaizi I-ron Mine in Zhangbaiwan Town,Luanping County is taken as an example,after drilling in mined-out area,C-ALS 3D laser scanning was used to obtain data point cloud and construct 3D visualization model,with FISH language conversion program into the FLAC^(3D),the mined-out area of distribution of earth pressure and deformation distribution characteristics,the damage of surrounding rock,the surface subsidence distribution analysis,and in conformity with the actual situation field mined-out area.It indicates that the technology method of C-ALS data point cloud and FLAC^(3D) coupling modeling is feasible in obtaining three-dimensional characteristic information of mined-out area and judging stability of mined-out area,which can provide technical reference for safety management,evaluation and stability analysis of similar mined-out area.