Waterpower pressurization blasting method

A hydraulic pressurization and water bag technology, applied in the field of blasting, can solve the problems of complex production process, low production efficiency, dust pollution, etc., achieve the effect of simple process, reduce the generation of blasting dust, and increase the packing strength

CN102944147AInactive Publication Date: 2013-02-27MAANSHAN INST OF MINING RES BLASTING ENG +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-02-27
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0025] In order to further describe the present invention, a hydraulic pressurized blasting method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Depend on figure 1 The shown schematic diagram of the charge structure of a hydraulic pressurized blasting method of the present invention shows that the method of the present invention divides the diameter d and depth h of the blast hole 8 into three parts, upper, middle and lower, and sequentially from top to bottom It is the height h1 of the rock cuttings 7, the height h2 of the water column 4 and the charge height h3 of the main explosive 1.

[0027] Among them: h=h1+h2+h3≈12m, d=200mm~250mm, h2=2.5~4m, h1=(12~20)d.

[0028] A kind of hydraulic pressurized blasting method of the present invention is carried out according to the following technological process:

[0029] 1) The main explosive 1 is loaded into the lower part of the continuo...