Handling method for mining quality accident

Abstract

The invention belongs to the technical field of mining and particularly discloses a handling method for a mining quality accident. The handling method interacts with a blasting device; a caved ore body formed by blasting introduces a top barren rock covering layer at an accident site into a small vacant field, so that normal ore removing conditions are achieved and the quality accident is thoroughly handled. Compared with a traditional method, the ore loss rate is reduced to 6 to 9 percent from 60 to 70 percent, the mining recovery rate is greatly improved to 91 to 94 percent from 30 to 40 percent and the operation safety is ensured.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for handling mining quality accidents. Background technique [0002] The segmental caving mining method, the stage height is 50-60 meters, the segmental height is 10-12 meters, and the mining approach distance is 10-11 meters. During the mining process, with the release of caving ore in this section, the waste rock covering layer in the upper section is released accordingly. When the ore drawing is completed, the caving area is full of waste rock covering layer. A common mining quality accident is that the caving height of this section does not reach the position of the upper section, and the part of the ore rock that has not collapsed forms a shape similar to a floor slab, which cuts off the waste rock covering layer of the upper section and cannot fill the area that has already collapsed; The accident was caused by inadequate design and construction of medi...

AI Technical Summary

Problems solved by technology

A common mining quality accident is that the caving height of this section does not reach the position of the upper section, and the part of the ore rock that has not collapsed forms a shape similar to a floor slab, which cuts off the waste rock covering layer of the upper section and cannot fill the area that has already collapsed; The accident was caused by inadequate design and construction of medium and deep holes, and poor blasting effect.

[0003] After a mining quality accident occurs, the traditional method is to mine ore in the small empty field formed by the accident. In order to prevent the roof of the empty field from collapsing and ensure safe production, most of the collapsed ore is left in the small empty field. Mining a small amount of ore, continuing to carry out blasting and mining in the back row of medium and deep holes, resulting in a mining loss rate of up to 60-70%, and a mining recovery rate of only 30-40%, which not only causes waste of resources but also causes instability in the roof of the empty field , there is a possibility of collapse and fall at any time, which will cause harm to safety production and cannot meet the needs of mine safety production

Images