A mine uses a large-diameter long-hole filling mining method.When the ore pillars are recovered in two steps,fan-shaped medium-long holes are difficult to form by drilling in the elevated region of loading points down the pillar,causing pillar recovery difficulties.To efficiently recover ore pillars and improve economic profits,VCR trenching and shaft sinking is tested and applied to replace down-the-hole drill cutting and shaft sinking.At the same time,large holes are used to replace medium-long holes in the trench area to form trenching blasting for space compensation.Field industrial test finds that after the construction process is optimized,the stoping cost in a single ore room is reduced by 52 000 yuan,and ore pillar recovery preparation time is shortened further,significantly improving mining economics and achieving good application performance.