Optimization of Mining Method for Gently Inclined Broken Thin Vein Based on Bayes Algorithm and Numerical Simulation
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.
gentle dip thin veinbroken roofmining methoddesign and optimizationnumerical simulationstope span
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