Concrete cushion resuing stoping method for narrow veins

Abstract

The invention provides a concrete cushion resuing stoping method for narrow veins. The method comprises the following steps: drilling resuing blast holes in a hanging wall or heading wall surroundingrock of a virtual cliff; continuously drilling ore breakdown blasting holes on a vein twice; respectively blasting the ore breakdown blasting holes; concentrating machines for ore mining; filling a stope; laying a concrete cushion on a flattened waste heap; circulating the processes until stoping of the whole ore block is finished. The concrete cushion resuing stoping method provided by the invention reduces the quantity of orepasses, reduces engineering quantity, reduces labor intensity of workers, increases the amount of caved ores, reduces the amount of mixed waste rocks, realizes mechanized transportation and mining, improves production capacity of the stope, reduces loss of ore fines, reduces depletion of ores, and contributes to control of a ground pressure of the stope to a certainextent by introducing twice continuous ore breakdown and concrete cushion laying process; the concrete cushion resuing stoping method maximizes use of resources while ensuring production safety, and has relatively high economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of a mining method for an underground metal mine, in particular to a mining method for thin vein concrete cushion wall cutting and filling. Background technique [0002] Many non-ferrous metal deposits and gold deposits belong to extremely thin to thin veins. Because the width of these veins is too small, in order to ensure sufficient working space, wall cutting and filling methods are generally used for mining. [0003] In the existing wall cutting and filling mining method (for example, the application number is 201610067459.2, and the name is a thin vein pre-cracking wall filling mining method), the ore vein (wall rock) is first collapsed once, and then the surrounding rock (mineral vein) is collapsed once, respectively. Mine or filling, so cycle until the end of ore mining. In this method, because the ore vein is too narrow, the amount of falling ore is small, the surrounding rocks of the upper and lowe...

AI Technical Summary

Problems solved by technology

In this method, because the ore vein is too narrow, the amount of falling ore is small, the surrounding rocks of the upper and lower walls are easily mixed, the loss of high-grade powder ore is large, and the production capacity is seriously insufficient.

In this way, the cost of ore transportation, lifting and beneficiation increases sharply, and the service life of the tailings pond is shortened, which seriously restricts the development of the mine and affects the economic and social benefits of the enterprise.

Images