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Deep-shallow hole combined blasting method

A technology of deep and shallow holes and deep holes, which is applied in the field of engineering blasting, can solve the problems of large pieces of blasting dregs, and the quality of blasting dregs is difficult to control, so as to improve the efficiency of excavation and installation, reduce the cost of overall blasting and blasting, and save the cost of secondary crushing Effect

Inactive Publication Date: 2009-10-07
CHINA RAILWAY HI TECH IND CORP LTD +1
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AI Technical Summary

Problems solved by technology

[0002] With the continuous development of blasting technology, medium and deep hole blasting has been widely used in rock blasting construction. However, due to the influence of geological conditions, it is difficult to control the quality of blasting ballast after blasting, especially in the blocked section of the blast hole. Therefore, under special geological conditions, there is still no good method for how to control the lumpiness of the blasted ballast.

Method used

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Embodiment Construction

[0009] Below by embodiment the present invention will be further described:

[0010] preferred embodiment

[0011] The deep and shallow hole combined blasting method includes the following steps:

[0012] (1) Drill deep blastholes according to the designed blasting hole network parameters;

[0013] (2), drill a small-diameter blasthole at the center position of every four adjacent deep blastholes with a small drilling rig again,

[0014] The depth of the small blast hole is slightly smaller than the plugging length of the deep blast hole;

[0015] (3) After the hole is formed, the blasthole orifice is blocked, waiting for the charge blasting.

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Abstract

The invention provides a deep-shallow hole combined blasting method, relating to an engineering blasting method. The invention aims to provide a deep-shallow hole combined blasting method for reducing the ratio of large blasting block at the plugging section of blasting hole, and following technical solution is used to realize the invention aim, comprising following steps: (1) drilling the deep blasting hole according to the parameters of the designed blasting hole mesh; (2) drilling a blasting hole of small diameter at the centre of every four adjacent deep blasting holes by a min-driller, the depth of the small blasting hole is a little less than the plugging length of the deep blasting hole; (3) plugging the blasting hole ports after finishing the hole drilling to prepare for filling drugs. The invention is primarily applied to engineering blast.

Description

technical field [0001] The invention relates to an engineering blasting method, in particular to a combined deep and shallow hole blasting method. Background technique [0002] With the continuous development of blasting technology, medium and deep hole blasting has been widely used in rock blasting construction. However, due to the influence of geological conditions, it is difficult to control the quality of blasting ballast after blasting, especially in the blocked section of the blast hole. Therefore, under special geological conditions, how to control the blockiness of the blasted slag, there is still no good method so far. Contents of the invention [0003] The object of the present invention is to provide a deep and shallow hole combined blasting method which can reduce the large block rate of blasting dregs in the blocked section of the blast hole under special geological conditions. [0004] The object of the present invention is achieved through the following tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04
Inventor 于力李健韩向红
Owner CHINA RAILWAY HI TECH IND CORP LTD
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