Ditching blasting method for deep open pit mine

Abstract

The invention relates to the field of blasting and discloses a ditching blasting method for a deep open pit mine. The method includes the following steps that firstly, the position of a gate way (10) is determined; secondly, a first through hole (20) is formed in the end, close to the stope direction, inside the gate way, and the first through hole serves as a detonating point; thirdly, a plurality of holes are formed in the position, close to the stope, outside the gate way and a detonating area is formed by the first through hole and the holes; and fourthly, explosives are loaded in the first through hole and the holes for detonating. According to the ditching blasting method for the deep open pit mine, the first through hole which is formed in the end, close to the stope direction, inside the gate way is used as the detonating point and aims at detonating the end of the gate way, and therefore it is ensured that a flood releasing well opening can be formed by a first bomb of blasting of the deep open pit mine. According to the ditching blasting method for the deep open pit mine, atmospheric precipitation and stope surface runoff can directly flow into the gate way, and safe flood draining can be achieved for blasting of the deep open pit mine.

Description

technical field [0001] The invention relates to blasting technology, in particular to a trenching blasting method in a deep concave open-pit mine. Background technique [0002] Ore deposits are rich in a large number of useful minerals, such as open-pit mines. According to the burial conditions and terrain conditions of the deposits, open-pit mines are divided into hillside open-pit mines and deep concave open-pit mines. Among them, those located above the closed circle on the surface are called hillside mines Open-pit mines are called deep concave open-pit mines located below the closed circle of the surface. [0003] Due to its own characteristics, deep concave open-pit mines have the conditions to gather atmospheric precipitation, surface runoff and underground water gushing. Because of this, how to prevent water gushing in the mining process of deep concave open-pit mines is very important, because once it happens Water gushing not only affects production, but can even ...

AI Technical Summary

Problems solved by technology

[0003] Due to its own characteristics, deep concave open-pit mines have the conditions to gather atmospheric precipitation, surface runoff and underground water gushing. Because of this, how to prevent water gushing in the mining process of deep concave open-pit mines is very important, because once it happens Water gushing will not only affect production, but will even lead to serious consequences, including reducing equipment efficiency and service life, reducing mine engineering speed, and destroying the stability of slopes, etc.

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