基于正交试验设计的采场结构参数优化及应用

Optimization of stope structure parameters based on orthogonal experimental design and its application

采场结构参数的优化选择对矿山的安全生产和经济效益有着重要意义。以内蒙古某银多金属矿为背景,结合矿山的采矿方法和开采技术条件,利用正交试验设计方法,针对采场进路的长、宽、高设计了9种不同采场结构参数的数值模拟方案,利用Rhinoceros建模软件耦合Flac 3D软件对这9种方案进行一步采和二步采数值模拟分析,并对9种方案的各个指标进行极差分析,结果表明:进路的高度对这些指标的影响较大,其次是宽度和长度。从安全、经济和技术方面综合考虑,确定方案5:进路长度25 m、进路宽度3.5 m、进路高度3.5 m的采场结构参数最优。现场工业试验表明:方案5效果良好,采矿损失率8%,矿石贫化率5%,提高了出矿效率,回采时能够有效控制地压,确保了回采过程的安全、经济、高效。

Optimal selection of stope structure parameters is of great significance to safety production and economic benefits of mines.This paper,taking a silver polymetallic deposit in Inner Mongolia as an example,based on the mining method and mining technical conditions of the mine and using the orthogonal experiment design method,9 numerical simulation schemes with different stope structure parameters are designed based on the length,width and height,and Rhinoceros modeling software coupled Flac 3D simulation analysis software is used to numerically simulate and analyze the one-step and two-step mining methods in the 9 schemes.Range analysis was conducted for each index of the 9 simulation schemes.The results showed that the height of the approach has a greater impact on these indicators,followed by width and length.Finally,comprehensive considerations of the safety,economy and technology determined the stope structural parameters of Scheme 5,in which the approach length is 25 m,width is 3.5 m,height is 3.5 m,to be the best.Field industrial test shows that the Scheme 5 is the best,with mining loss rate to be 8%,ore dilution rate 5%,and increased ore drawing efficiency.Besides,the ground pressure can be effectively controlled during extraction,and the safety,economy and efficiency are ensured.