大直径深孔嗣后充填法采场结构优化的数值模拟

Numerical simulation on the Optimization of Stope Structure of Large-diameter Long Hole Afterwards Backfilling Mining Method

针对新疆阿舍勒铜矿开采技术条件,采用Ansys有限元软件,对采场跨度为10,12,13,15 m时的围岩应力、位移变化规律进行了数值计算分析。结果显示,采场跨度是影响其稳定性的重要因素,在现有条件下,采场跨度在13 m以上是不稳定的,计算结果、相似模拟实验结果及开采实践对比分析表明,采场最佳跨度为8～12 m。

According to the mining technical conditions of Asele copper mine, the Ansys software is adopted to calculate and analyze the stress and displacement change rule of the stope wall rocks with various spans of 10,12,13,15 m. The research results show that,stope span is the important factor which influences the stability of stope. Under the existing condition, if the stope span is above 13 m, it will be not remain stable ,therefore,the optimal value of stope span is from 8 m to 12 m.