金属矿充填法开采对地表构筑物稳定性影响模拟

Simulation of Influence of Filling Mining on Stability of Surface Structures in Metal Ore

为确保某金属矿山采用充填法开采过程中地表移动带内调水工程的安全性,应用有限差分法进行矿区三维数值模拟计算,并采用安全性分析指标进行量化评价。研究表明:矿区开采结束后,采场周围部分区域出现了以拉伸破坏为主的塑性区,采场及时充填治理有效地避免破坏增大现象;地表变形主要为采场正上方自四周逐渐减小的均匀沉降变形,调水工程能够保持较好的稳定性;现场实测结果验证了模拟结果的准确性。

To ensure the safety of the water transfer project in the surface moving zone in the mining process of a metal mine by filling method,the finite difference method was applied to carry out the three-dimensional numerical simulation calculation of the mining area,and the safety analysis index was used to carry out the quantitative evaluation.The results show that after the mining,plastic zone mainly dominated by tensile failure appears in some areas around the stope,and stope filling treatment can effectively avoid the phenomenon of damage increase.The surface deformation is mainly the uniform settlement deformation which gradually decreases from the upper side of the stope,and the water diversion project can maintain good stability.The accuracy of the simulation results was verified by field measurement results.