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Pre-crack blasting hole charging device for foundation pit excavation

A technology of pre-split blasting and blasting charge, applied in blasting and other directions, can solve the problems of difficult to precisely control the installation position, affecting the effect of pre-split blasting, etc., to prevent brewing accidents, overcome the randomness of installation, and reduce losses Effect

Pending Publication Date: 2018-08-21
厦门爆破工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that it is difficult to precisely control the installation position during implementation, which will eventually affect the effect of pre-splitting blasting

Method used

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  • Pre-crack blasting hole charging device for foundation pit excavation
  • Pre-crack blasting hole charging device for foundation pit excavation
  • Pre-crack blasting hole charging device for foundation pit excavation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] 1. Pre-splitting blasting blasthole charging system and device

[0025] like figure 1 As shown, the pre-splitting blasting is to drill a row of blastholes 10 on the blasting rock 14, the charge device 20 is arranged inside the blasthole 10, and the uncoupled charge method is adopted, and the front blaster 21 is blasted in the main blast zone 12 where the blast center 11 is located. The internal electronic detonator is detonated, and the row of charge devices is detonated, so that the rock 14 is pulled off at the excavation surface, forming a contour line 13 that runs through the fissure neatly.

[0026] In order to achieve precise control of the effect of pre-splitting blasting and obtain an ideal blasting contour, the idea of ​​this patent is to overcome the traditional random charging method and adopt a precisely designed charging structure to ensure the setting of the explosive in the blast hole. The blasting can be carried out at a certain position, and at the same...

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Abstract

The invention discloses a pre-crack blasting hole charging device for foundation pit excavation, which includes a sealed cylinder as well as a supporting rod, a bottom bedding, an electronic detonatorand a plurality of explosive packages connected in series by a detonating cord which are arranged in the sealed cylinder. The bottom bedding is arranged at the bottom of the cylinder. The supportingrod is embedded in the inner part of the bottom bedding and is fixed at the central position of the cylinder. The explosive packages are fixed on the supporting rod. The electronic detonator is fixedwith one of the explosive packages and is connected with an external initiator through a firing line; the top end of the cylinder is provided with a hole plug. The cylinder is filled with water medium; the device overcomes the problems of large installation randomness and low blasting precision of the pre-crack explosive in the prior art, and ensures the completeness of the pre-crack blasting contour line.

Description

technical field [0001] The invention belongs to the technical field of blasting engineering, and in particular relates to a pre-splitting blasting blast hole charging device used for foundation pit excavation. Background technique [0002] Pre-splitting blasting is widely used in underground excavation engineering, slope treatment, and large-scale blasting anti-vibration and shock absorption projects. Pre-splitting blasting refers to blasting a penetrating crack with a certain width along the design contour line before blasting in the main blasting area during rock excavation, so as to buffer and reflect the vibration wave of excavation and blasting and control its impact on the retained rock mass. The destructive influence makes it obtain a smoother excavation profile. Pre-splitting blasting is not only widely used on vertical and inclined excavation walls; pre-splitting blasting is also used on regular curved surfaces, twisted surfaces, and horizontal foundation surfaces....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 林中原张大成许黎明肖绍清李少波杨育杨朝阳林树枝刘典基刘文辉林友辉沈顺平
Owner 厦门爆破工程有限公司
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