A charging system suitable for water-containing blasting

Abstract

The invention discloses a charging system suitable for water-containing blast hole blasting. The charging system comprises a charging isolation bag, the charging isolation bag is of a hollow annular structure formed by an outer cylinder (2) and an inner cylinder (2') in a sleeving manner, the bottom of the inner cylinder (2') is communicated with the outside through a one-way valve (9), water in a blast hole (1) is closed in the gap between the blast hole (1) and the outer cylinder (2) and in the inner cylinder (2') to form water columns (3), the air gap (5) between the outer cylinder (2) and the inner cylinder (2') is filled with ammonium oil explosive, the upper portion of the air gap is plugged by rock powder, and a non-electric detonator connected with a detonating tube is embedded into the ammonium oil explosive. According to the charging system, a charging distribution structure of 'water-ammonium oil explosive-water-ammonium oil explosive-water' is formed on a charging portion of the lower portion of the blast hole (1) along the profile of the blast hole (1), the charging quantity of the blast hole is decreased without reducing crushing quality by the aid of hydraulic pressurizing action, blasting action time is prolonged, water spray formed after blasting of explosive can control blasting dust, blasting environments are improved, and good production conditions are created.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining and engineering blasting, and in particular relates to a blasting charge system, which is especially suitable for solving the charge problem of water-containing blastholes in open-pit blasting. Background technique [0002] In open-pit deep hole blasting, the crushing quality of ore rock and the unit consumption of explosives are important indicators that directly affect the mining cost. According to statistics, the price of ammonium oil explosives per ton is about 3,000 yuan lower than that of emulsion explosives per ton; for open-air water-containing blastholes, ammonium oil explosives that fail to meet water are usually not directly used, and emulsion explosives are used, resulting in relatively high cost of water hole blasting explosives. High; at the same time, it is difficult to fill the emulsion explosive in the water-containing blast hole, and it is not easy to charge the charge to...

AI Technical Summary

Problems solved by technology

[0007] In order to effectively reduce the blasting cost of water-containing blastholes, and at the same time solve the technical problem that ammonium oil explosives cannot be used in water-containing blastholes, reduce the amount of explosives used, reduce the cost of explosives, improve the energy utilization rate of explosives, reduce the large block rate after blasting of water-containing blastholes, and increase shovel loading efficiency, the present invention provides a charge system suitable for water blast hole blasting

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