Pillar Recovery Scheme and Stope Structure Parameter Optimization of a Molybdenum Mine
In the early stage of a certain molybdenum mine,the shrinkage mining method was used,and a large number of roof pillars and space pillars remained in the mining area.In order to avoid resource waste,the recovery schemes for the pillars was studied.By comparing the economic and technical indicators of various mining methods,it was ultimately determined that the segmented filling mining method would be used to recover the space pillars when the upper part of the pillar was the ore body,and the segmented filling mining method with reserved top pillars would be used to recover the space pillars when the upper part of the pillar was the filling body.It is recommended that the mine adopt the segmented rock drilling and segmented filling mining method to recover the top pillars when the previous middle section is not filled.Based on the selected mining method,the stope length and the reserved top pillar thickness were optimized by numerical simulation.The stress and displacement distribution of the surrounding rocks and filling body of the mining area with different structural parameters were analyzed,and it was determined that the structural parameters with stope length of 50 m and reserved top pillar thickness of 5 m were more reasonable.The application of the optimized pillar recovery scheme can create approximately 4 705 200 RMB of economic benefits for the mine.
万方数据
维普
