基于Bayes算法与数值模拟的缓倾斜破碎薄矿体采矿方法优选

Optimization of Mining Method for Gently Inclined Broken Thin Vein Based on Bayes Algorithm and Numerical Simulation

为实现某锰矿顶板破碎低品位缓倾斜薄矿体安全高效经济开采,首先根据开采条件设计出5种技术可行的采矿方法,然后基于贝叶斯(Bayes)和蒙特卡洛(Monte Carlo)方法建立涵盖技术和经济共17项评价指标的采矿方法优选体系进行采矿方法优选。研究结果表明,浅孔进路V型掏槽后退/前进采矿法、中深孔进路V型掏槽/平行抛掷采矿法和浅孔接钎头斜向掏槽采矿法的综合得分依次为0.524、0.193、0.214、0.228和0.221,浅孔进路V型掏槽后退采矿法最优。最后采用MIDAS数值模拟对优选出的采矿方法的4种不同跨度采场的稳定性进行分析,其采场跨度12 m时可在采场稳定性和矿石回收率之间取得较好平衡。综合考虑技术、经济和安全指标的采矿方法及采场结构参数优化思路,可为该矿山选出安全高效采矿方案,并可供类似矿山参考借鉴。

To achieve safe,efficient,and economically viable mining of a manganese mine with a fractured,low−grade,gently sloping,thin ore body,five technically feasible mining methods were first designed based on the mining conditions.Subsequently,a mining method optimization was conducted,utilizing a system established on Bayes and Monte Carlo methods,encompassing 17 evaluation criteria covering both technical and economic aspects.The research findings indicated that the comprehensive scores of the shallow hole approach V−cut retreat/advance mining method,the medium−deep hole approach V−cut/parallel throw mining method,and the shallow hole drill head oblique cut mining method were 0.524,0.193,0.214,0.228,and 0.221,respectively.The shallow hole approach V−cut retreat mining method was found to be the most optimal.Finally,MIDAS numerical simulation was employed to analyze the stability of four different span stops of the selected mining methods.A span of 12 meters was found to achieve a favorable balance between stope stability and ore recovery rate.Considering technical,economic,and safety indicators,the optimization approach for mining methods and stope structural parameters can assist in selecting a safe and efficient mining scheme for the mine,and can also serve as a reference for similar mines to improve their operations.