Staged rock drilling and staged mining and subsequent filling mining method

Abstract

The invention discloses a staged rock drilling and staged mining and subsequent filling mining method. A last-stage ore room and a next-stage ore room share a bottom ore drawing structure of the next-stage ore room, and no top pillar or bottom pillar needs to be arranged between the last-stage ore room and the next-stage ore room; vertical deep holes are drilled in parallel in a rock drilling chamber of the last-stage ore room and a rock drilling chamber of the next-stage ore room; firstly the next-stage ore room is caved row by row, caved ore is shoveled and loaded in a loading roadway, thendischarged into an extra-vein ore pass or an intra-vein ore pass through a loading connecting roadway, a part of ore is reserved as a buffer cushion layer for caving the last-stage ore room; after caved ore of the last-stage ore room and the next-stage ore rooms is completely discharged, a sealing retaining wall is adopted to seal a rock drilling connecting roadway and an ore drawing connecting roadway, a goaf is filled, and the same method is adopted to carry out two-step ore pillar mining after the filling body reaches the specified maintenance strength. Continuous large-scale mining is realized, the workload of pre-mining cutting is reduced, the ore recovery rate and the production efficiency of a stope are improved, and the mining production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of mine development, and in particular relates to a mining method for underground mining of metal ore deposits, and is particularly suitable for underground mining of medium-thick and above steeply inclined ore bodies with stable ore rocks. Background technique [0002] The mining method of stage mine followed by filling is a mining method in which the bottom space or cut-out pit is taken as the free surface by row-by-row blasting and filling the goaf. This method has the characteristics of high mining efficiency and low production cost, and is mainly suitable for: ① ore deposits with relatively stable ore rocks; ② steeply inclined ore deposits with medium-thick ore body thickness; ③ relatively regular ore body shape, uniform thickness variation and Deposits without intercalated rocks; ④Multiple ore body deposits with parallel steep dips; ⑤Ore deposits with low ore value and the surface does not allow caving...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a safe, reliable and efficient production method aiming at the problems of large mining and cutting engineering quantity, complex process, poor flexibility, large ore loss and dilution rate, and limited production efficiency in the subsequent filling method of mines at the present stage. High-efficiency, simple process, suitable for stable ore rocks, vertical downward deep hole drilling in stages and mining in stages followed by filling mining methods, aiming to achieve efficient continuous large-scale mining, improve ore recovery rate, and reduce mine production costs

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