矿山采空区稳定性分析与治理研究

Stability analysis and management on goaf in underground mines

迁安市脑峪门铁矿由于多年的开采形成了大量的采空区,对矿山的安全生产造成严重的威胁。首先通过空区探测系统(VS150)和3DMINE软件建立空区三维模型。然后采用有限元软件FLAC3D对矿区开采过程形成的空区稳定性进行模拟计算与预测分析,研究结果表明随着开采水平的加深,空区内留有的点柱承受载荷和围岩应力逐渐增加,空区对地表的影响范围也逐渐增大。最后根据矿山技术经济等条件,选取中深孔爆破空区顶板诱导上盘围岩冒落的处理方案,并确定了具体的施工参数,经现场实践证明此方案可以有效地控制空区的稳定性,为矿山的安全生产提供保障。

Qian＇an Naoyumen Iron Mine has a large number of mined-out areas due to years of mining operation , seriously affecting the mine production safety. The three-dimensional model of the mined-out area is built by Cavity Detection System （VS150） and 3DMINE software and then the finite element software FI.AC3D is used to simulate and predictively analyze the stability of the mined-out area developed in mining operation. The results indicate that with deepening exploitation level, the load bearing of point column and rock stress will gradually increase and the influence sphere of mined-out area on the surface also will rise. Finally, in light of the mine technical and economic conditions, the medium-deep hole blasting and induced caving technique is taken and the specific construction parameters are determined. The site practice proves that the scheme effectively control the stability of the mined-out areas and provide a protection for the mine safety production.