A safe mining method for steeply inclined broken thin veins

Abstract

The invention discloses a safe mining method for steeply sloping broken thin ore veins. By setting up a closed space in the middle of the stope, filling the closed space with caving ore, supporting and blasting the caving ore filling to form artificial ore pillars, the upper and lower plates of the stope are affected. The surrounding rock is supported to reduce the mining span of the stope, improve the stability of the stope, ensure the safety of the stope mining operation, and solve the problem that the roof of the stope and the surrounding rock of the upper and lower walls are easily collapsed during the mining process. The problem. At the same time, compared with the existing mining method, the method for safe mining of steeply sloping broken thin veins of the present invention can avoid the mixing of broken surrounding rocks and the loss of mineral resources during the mining process, and can realize all the recovery of the ore in the stope. The ore recovery rate is improved, the production cost is effectively reduced, and it has the characteristics of high operation safety, high ore recovery rate and low ore dilution rate, and can realize safe, economical and efficient mining of steeply inclined and broken thin ore veins.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a safe mining method for steeply sloping broken thin ore veins. Background technique [0002] Sharply inclined thin veins are widely distributed in my country's non-ferrous metal mines, especially in tungsten and gold deposits. As the mining depth increases, the geological conditions are complex and changeable, and the weak and crushing environments increase. During the mining of this type of ore vein, the upper and lower wall rock masses tend to collapse under the action of high stress and blasting disturbance, which seriously affects the safety of the mining process. [0003] For the mining of steeply inclined thin veins, the existing mines mostly use the shallow hole ore retention method and the wall-cutting filling method. There are problems such as small production capacity, high cost, low efficiency, poor operation safety, low degree of mechanization, and high labor intensi...

AI Technical Summary

Problems solved by technology

With the increase of mining depth, the geological conditions are complex and changeable, and the weak and broken environment increases. During the mining process of this type of vein, the upper and lower wall rocks often collapse under the action of high stress and blasting disturbance, which seriously affects the safety of the mining process.

[0003] For the mining of steeply inclined ore veins, the existing mines mostly adopt methods such as shallow hole retaining method and wall cutting and filling method. There are problems such as small production capacity, high cost, low efficiency, poor operation safety, low degree of mechanization, and high labor intensity of workers. When the ore and surrounding rock are weak and broken, the roof of the stope and the surrounding rock of the upper and lower walls during the mining process are prone to damage. Collapsing will seriously threaten the safety of operators. At the same time, the mixing of waste rocks and difficulties in mining will also greatly increase the ore dilution rate and loss rate.

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