Presplitting blasting and charging combined structure and method

A technology of pre-splitting blasting and combined packaging, which is applied in blasting and other directions, which can solve the problems of high cost, cumbersome operation of the charging process, and complicated production, and achieve the effects of reducing production costs, improving explosive transmission, and simple production

Inactive Publication Date: 2020-01-10
CHINA GEZHOUBA GRP YIPULI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems in the prior art that the pre-splitting blasting combined charge structure is more complicated to manufacture, the charge process is more cumbersome to operate, additional auxiliary tools are required, and the cost is high, one of the purposes of the present invention is to provide a A charge structure and a pre-splitting blasting combined charge structure that are easier to make; the second purpose of the present invention is to provide a pre-split blasting combined charge that is more convenient in the charging process, does not require additional auxiliary tools, and has a lower cost. medicine method

Method used

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  • Presplitting blasting and charging combined structure and method
  • Presplitting blasting and charging combined structure and method
  • Presplitting blasting and charging combined structure and method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as Figure 1-3 As shown, a pre-splitting blasting combined charge structure includes at least one shaped charge column 1 and at least one PVC pipe 2, and the charge column 1 has a plastic shell with both ends closed. The middle part of the charge 1 is provided with two detonating cord holes 5 passing through the charge 1, and the two ends of a detonating cord 4 respectively pass through the two detonating cords of the charge 1 in the same direction. Hole 5, after covering the charge column 1 at the lowermost end, all charge columns 1 and PVC pipes 2 are connected in series.

[0025] Wherein, two energy-gathering grooves 1a distributed at 180° are formed on the side wall of the charge column 1, and the energy-gathering grooves 1a are symmetrically arranged on both sides of the detonating cord hole 5. The centerlines of the two energy-gathering grooves 1a on the charge column 5 are located in the same plane, and are fixed to the positions of the detonating cord hole...

Embodiment 2

[0030] Such as Figure 1-3 As shown, a pre-split blasting combined charge method adopts the pre-split blast combined charge structure of embodiment 1 to carry out uncoupled charge, and the specific steps are:

[0031] (1) First pass both ends of a detonating cord 4 in the same direction through the two detonating cord holes 5 on the charge column 1 respectively, and lower the charge column 1 to the blast hole by lowering the detonating cord 4 bottom;

[0032] (2) Continue to directly lower the second charge column 1 or the PVC pipe 2 through the two ends of the detonating cord 4, and so on until the charge is completed.

[0033] Wherein, before the powder charge column 1 is lowered, the two energy-gathering grooves 1a need to be axially extended in the blasthole at the same phase, so that the centerlines of the two energy-gathering grooves 1a are aligned with the centerline of the blasthole.

[0034] The following introduces the practical application of applying the charge m...

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Abstract

The invention provides a presplitting blasting and charging combined structure and method. The presplitting blasting and charging combined structure comprises at least formed charging explosive columnand at least one PVC pipe. Each charging explosive column is provided with a plastic shell with two ends sealed. The middle of each charging explosive column is provided with two detonating cord holes running through the charging explosive column. The two ends of a detonating cord penetrate through the two detonating cord holes of each charging explosive column in the same direction correspondingly. All the charging explosive columns are connected with the PVC pipes in series after the charging explosive column at the bottommost end is held. The presplitting blasting and charging combined structure is easier to manufacture, and only the explosive columns need to be customized through a die; the charging explosive columns and the PVC pipes are connected through the detonating cords, and the manufacturing cost is reduced; and no auxiliary tools need to be additionally used in the charging method, the operation process is simpler, and cost is lower.

Description

technical field [0001] The invention relates to pre-splitting blasting in open-air step blasting, in particular to a pre-splitting blasting combined charge structure and method. Background technique [0002] In large-scale hydropower projects and open-air step blasting, pre-split blasting, a special blasting technology, is often used to form slopes. It is mainly to reduce the damage of explosives to slopes or retained rock mass, protect the integrity of slopes, and reduce Slope maintenance costs. It is generally achieved by using low-power explosives or uncoupled charges. The uncoupled charges are divided into radial uncoupled and axial uncoupled charges. Compared with ordinary charges, uncoupled charges, especially axial uncoupled charges Additional tools must be used, making construction operations more cumbersome. [0003] In the existing pre-splitting blasting charge process, the charge coil and the detonating cord are generally bound to bamboo chips, wooden sticks or ...

Claims

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Application Information

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IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 黄雄周桂松付军朱宽李艺
Owner CHINA GEZHOUBA GRP YIPULI CO LTD
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