基于3DMine-Rhino-FLAC^(3D)的多采空区对竖井的稳定性影响分析

Analysis of the influence of multiple goafs on shaft stability based on 3DMine-Rhino-FLAC^(3D)

随着矿山的不断深入开采,会遗留大量采空区,采空区的失稳破坏势必会对位于移动带内的竖井稳定性造成影响。竖井的变形破坏不仅影响矿山的正常生产,还将造成人员安全和财产安全等隐患。随着高性能计算机和数值模拟技术的普及,为复杂采空区及竖井的稳定性研究提供了新的解决思路。为了解内蒙古某金矿竖井的稳定情况,本文在三维网格堆砌法的基础上提出了3DMine-Rhino-FLAC ^(3D)耦合建模,能够更加精准地反应地表、矿体和采空区的实际情况,提高计算的准确性,并对竖井周围的应力、位移、塑性区等方面进行了分析,提出两种可行的治理措施。研究结果表明,两种治理措施均能使井筒变形得到控制,可以有效提高竖井周围围岩的稳定性。

With the continuous in-depth mining of the mine,a large number of goaf will be left.The instability and failure of the goaf is bound to affect the stability of the shaft located in the moving zone.The deformation and damage of the shaft will not only affect the normal production of the mine,but also cause hidden dangers such as personnel safety and property safety.With the popularization of high-performance computer and numerical simulation technology,it provides a new solution for the stability research of complex goaf and shaft.In order to understand the stability of a gold mine shaft in Inner Mongolia,based on the three-dimensional grid stacking method,this paper proposes 3DMine-rhino-FLAC ^(3D) coupling modeling,which can more accurately reflect the actual situation of the surface,ore body and goaf,improve the accuracy of calculation,analyze the stress,displacement and plastic zone around the shaft,and put forward two feasible treatment measures.The results show that the two treatment measures can control the shaft deformation and effectively improve the stability of the surrounding rock around the shaft.