大型复杂采空区空间结构演化规律研究

随着地下矿山开采活动的进行,采空区已成为影响矿山安全的主要隐患之一。以某铜锌矿为背景,利用VS150空区精密探测系统对采空区进行精密探测,采用VoidScan-Geomagic-3Dmine耦合技术,分别建立了研究时段与设计时段采空区三维精细模型,进而对比分析了采空区空间结构演化过程,采用3Dmine-Midas GTS NXFLAC~(3D)耦合的数值模拟技术,结合矿区实际生产情况对设计时段空区进行数值模拟分析,并对空区空间结构演化过程中位移场、应力场及塑性区进行系统的研究,确定了空区顶板及围岩的稳定程度,并进一步揭示了未来时段空区的演化趋势。数值模拟结果与现场实测工作结果相吻合,研究结果为采空区后续的安全治理提供了科学依据。

Study on Space Structure Evolution of Large and Complicated Underground Goaf

The goaf instability is one of the major safety risks during underground mining. In a setting of a copper zinc mine, the goaf was precisely detected using a void scanner (VS150). By using the VoidScan-Geomagic-3Dmine coupling technology, the fine reconstruction of the three-dimensional goaf model for different time periods was realized, and the evolution of the mine goaf is analyzed. On this basis, a comprehensive goaf numerical simulation is conducted by using the coupled 3Dmine Midas GTS NX-FLAC^3D technology. According to the simulation results, the displacement field, stress field and plastic zone are analyzed, and the stability of the goaf roof and surrounding rocks is discussed. The evolution mechanism of the goaf in the future is also revealed. The results from numerical simulation are consistent with field measurement results, hence providing a scientific basis for the safety and timely treatment of goaf.