Method for recovering residual ore in mine goaf

Abstract

The invention discloses a method for recovering residual ores in a mine goaf. The method comprises the following steps of dividing 3-6 continuous stopes (2) and a panel middle column (3) in a panel (1), arranging a panel top column (4) and a panel bottom column (5) in the vertical direction, enabling ores (7) in the panel stopes (2) to fall into a stope trench (11) through blasting, loading the ores in an ore removal access road (12) by a carry-scraper through an ore removal roadway (10), transporting the ores to a vein-following roadway (8), and unloading the ores into a draw shaft (14). After stoping and ore extraction are completed, tailings are filled into the goaf through a filling roadway (15), and a panel filling body (6) is formed. After filling of the panel stopes (2) is completed, the adjacent panel stopes (2) are stoped, and the formed goaf is subjected to subsequent filling. After filling of the adjacent panel stopes (2) is completed, part of the panel interval columns (3) are recycled, the goaf formed by the panel interval columns is filled, and finally the goaf is eliminated. The mining intensity can be improved by utilizing the limited ore body distribution area, the production capacity is increased, and the mining and goaf filling cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of mine recovery, and in particular relates to a method for recovering residual ore in a mine goaf. 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 surface to allow subsidence. Under the premise that my country's mineral resources are dominated by low-grade ores, mining methods with high production capacity and low mining costs have broad application prospects. [0003] At present, the mining m...

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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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