High-yield and low-cost subsequent filling mining method for underground mine

Abstract

The invention discloses a high-yield and low-cost subsequent filling mining method for an underground mine. An ore section is partitioned into panels (1) underground; each panel is partitioned into 3-6 continuous stopes (2) and a panel barrier (3); a panel top column (4) and a panel bottom column (5) are distributed in the vertical direction; ores (7) in panel stopes (2) fall into a stope trench (11) by blasting; a carry scraper is used for loading ores in an ore outlet feeding channel (12) through an ore outlet laneway (10), transporting the ores to a strike drive (8), and unloading the ores into a pass (14); after stoping and ore discharge are completed, milltailings are filled into a blank region through a filling laneway (15) and a pipeline to form a panel filling body (6); after the filling into the panel stopes (2) is completed, a hollow region formed by subsequent filling in an adjacent panel stope (2) is stoped; and after the adjacent panel stope (2) is filled, a part of the panel barrier (3) is recovered, and a hollow region formed by the panel barrier is filled, so that the hollow region is eliminated finally. According to the method, the mining strength can be enhanced by using limited ore distribution area, the production capacity is increased, and mining production and hollow region filling treatment costs are reduced.

Description

technical field [0001] The invention relates to an underground mine mining method, in particular to a subsequent filling mining method for high-efficiency mining of large-scale underground mines. It is suitable for non-coal underground mines to use limited ore body distribution area to increase mining intensity, expand production capacity, and reduce mining production and empty area filling processing costs. Background technique [0002] There are three basic methods of underground mining in metal mines: one is the open field method, the other is the caving method, and the third is the filling method. Various mining methods have their own conditions of use: open-field mining method has large production capacity, low mining cost, and poor safety; filling mining method has low production capacity and high production cost, and is often used to mine high-value ores; caving mining method has high production capacity, However, the loss and dilution are large, requiring the surfac...

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Problems solved by technology

[0003] At present, the mining method of open-pit mining followed by filling has been tested in China, and remarkable achievements have been made, mainly including the method of open-pit mining followed by filling in the downward large hole stage, the method of segmented open-pit mining followed by filling mining, and the method of mine mining followed by filling mining. methods, etc., but there are still limitations on production capacity and production cost. The main reason is that the stope adopts two-step mining. After the first-step mining, it is necessary to use high-strength tailings to cement the goaf to create conditions for the second-step mining. This results in increased cost and complicated process, which hinders the further increase of production capacity of underground mines

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