夏甸金矿地表沉降的计算机模拟

Computer Simulation on Surface Subsidence of Xiadian Gold Mine

针对夏甸金矿实际问题,在对现场采矿方法和地表监测等情况调查后,利用FLAC3D对采空区影响的矿岩移动情况进行数值模拟分析。分析结果表明,在当前生产条件下,矿山开采对地表无影响;同时基于散体流动时空演化仿真模型,研发了夏甸金矿地表沉降计算机模拟系统,给出了模拟结果,认为在实验范围内,松散系数超过1.2时矿山开采对地表无影响。计算机模拟结果为矿山决策支持提供了科学依据,也为进一步研究因地下开采引起的地表沉降问题做了有益的尝试。

In view of the actual situation of Xiadian gold mine, and based on the investigation on the on-site mining methods and ground monitoring, FLAC3D is adopted to make a numerical simulation analysis on the rock movement influenced by the mined-out area. The analysis results show that under the current production conditions, no effect on the surface occurs by the mining. Meanwhile, based on temporal evolution simulation model of granular flow, the computer simulation system of surface settlement for Xiadian Gold Mine is developed, and the simulation results are given. It is believed that within the experimental range, mining has no effect on surface with the loose factor exceeded to 1.2. The computer simulation results provide a scientific basis for decision-making of the mine, and also make a good attempt for further studying the surface subsidence caused by underground mining.