Waterpower pressurization blasting method

Abstract

The invention discloses a waterpower pressurization blasting method. A water bag (3) is arranged in the upper part of a main explosive (1), a preset amount of water is injected into the water bag (3) to form a waterspout (4), a leading compressive powder bag (6) is arranged in the upper part of the waterspout (4), and rock scraps (4) is stuffed in the upper part of the water bag (3). Detonating tube detonators of different sections are distributed in the main explosive (1) and the leading compressive powder bag (5). Two different sections of main explosive detonating tubes (2) are arranged in the main explosive (1), and a leading compressive powder bag detonating tube (5) is arranged in the leading compressive powder bag (6). The leading compressive powder bag detonating tube (5) is detonated at least 25ms before the main explosive detonating tube (2). According to the method, the waterspout is utilized to effectively transmit energy, the method has the advantages of a low rate in large blocks, little dust, convenience in operation, safety and reliability, is particularly suitable for blasting in production of a large-scale open-air mine, in the underground deep hole of a downward hole blasting, and in projects of other non-mine fields.

Description

technical field [0001] The invention relates to a blasting method, in particular to a large-diameter blasting method for open-pit mines. It is suitable for open-pit mines, underground mine blasting for downhole blasting, and engineering blasting in other non-mining fields to reduce the bulk rate, improve shovel loading efficiency and reduce production costs. Background technique [0002] In open-pit deep hole blasting, the general concern is the crushing quality of ore rock, because it is an important indicator that directly affects mining costs. At present, although the crushing quality of ore rock blasting in many mines has been improved due to the continuous improvement and renewal of blasting technology and blasting equipment, the crushing quality of rock at the top of the steps is still poor. One of the main reasons for the high. [0003] Due to the need to maintain a sufficient filling length for step blasting, for step blasting with a height of 12m, the general fill...

AI Technical Summary

Problems solved by technology

This patent application solves the problem of high blockage rate in the deep hole step blasting block section, but the deep blast holes and shallow blast holes must be drilled separately, the production process is complicated, the operation is inconvenient, the production efficiency is low, and there are problems such as dust pollution.

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