高阶段大直径深孔采场稳定性数值模拟研究

Numerical Simulation on the Stope Stability with High-level and Large-diameter Deep Hole

以紫金山金铜矿深部开采为工程背景,采用FLAC3D数值模拟分析不同方案高阶段大直径深孔采场的稳定性,从位移、应力和采场周边矿围岩破坏比3各方面分析,得出方案1和方案3的结果较为接近,但方案1略优于方案3,而方案2的结果最差,因此,建议将段高改为50 m,采场可具有较好的稳定性。

Taking the deep mining in Zijinshan Copper mine as the engineering background, the slope stabilities with differentschemes of high-level and large-diameter deep hole were simulated and analyzed by FLAC3D. From the analysis of displacement,stress to destruction ratio between surrounding rock and ore, it was obtained that the results of No.1 scheme was similar to thatof No.3 scheme, but was slightly better than that of No.3 scheme, and the results of No.2 scheme was the worst. Therefore,the level height was recommended to 50 m, with good stope stability.