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Method of smooth powder charge for preventing blast hole from collapsing

A technology of blast holes and collapsed holes, which is applied in blasting and other directions, can solve the problems of high blasting costs and easy blockage of blast holes, and achieve the effects of ensuring blasting effects, avoiding dust pollution, and reducing energy consumption

Active Publication Date: 2015-05-27
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preventing blast holes from collapsing and achieving smooth charging to solve the problems of easy blockage of blast holes and high blasting costs in areas with poor geological environment

Method used

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  • Method of smooth powder charge for preventing blast hole from collapsing
  • Method of smooth powder charge for preventing blast hole from collapsing
  • Method of smooth powder charge for preventing blast hole from collapsing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method provided by the present invention to prevent blast hole collapse and realize smooth charging comprises the following steps:

[0038] S1, such as figure 1 with figure 2 As shown, after the blast hole 2 is drilled on the rock mass 1, the sleeve 3 is filled in the blast hole 2 immediately; Root short sleeve 31 is long 1-2m, and short sleeve 31 external diameters are slightly smaller than blast hole 2 internal diameters, and short sleeve 31 internal diameters are slightly larger than the charge roll diameter of packing or slightly larger than the required internal diameter of blasting charge; The barrel 3 is made of a material with a certain strength and toughness, so as to adapt to a small amount of deflection of the blast hole 2 caused by construction accuracy.

[0039] S2. Load the explosive volume 5 into the sleeve 3; of course, the explosives in the blasting package can also be in other forms.

[0040] S3, such as image 3 As shown, insert the barrel ro...

Embodiment 2

[0052] On the basis of Embodiment 1, Embodiment 2 specifically takes the blasting mining of a mine in my country as an example to introduce the method of the present invention for preventing blast holes from collapsing and realizing smooth charging.

[0053] In this mine, due to the deep burial of the ore body, the large in-situ stress, the large change in the hardness of the upper and lower walls of the ore rock, the development of joints and fissures in the ore body, the ore body is relatively broken, and the quality of rock drilling is poor. There is a time interval between them, and the blasthole 2 of the first construction has collapsed when the blasthole 2 is all drilled and begins to charge. In order to reduce the impact of collapsed holes and shorten the time for drilling blast holes 2 and charging as much as possible, in the past, mines used blast holes 2 with an average footage of 2m and a diameter of blast holes 2 of 42mm. The blasting time is 6-8 hours. Due to the ...

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Abstract

The invention relates to the technical field of mining, in particular to a method of smooth powder charge for preventing a blast hole from collapsing. According to the method of the smooth powder charge for preventing the blast hole from collapsing, the blast hole is filled with a sleeve, so as to realize the smooth powder charge; a sleeve taking rod is inserted into the sleeve, so as to resist an explosive roll, the sleeve is retracted, explosives are left in the blast hole, then a detonator is put in, the blast hole is blocked by adopting stemming, and detonation is waited; thus, the blast hole is supported in advance, so as to prevent the blast hole from collapsing. Compared with a method of unblocking the blast hole by adopting a hole unblocking device, energy consumption for secondary treatment is reduced, high dust pollution is avoided, repeated recycling of the sleeve is realized, and the blasting cost is reduced; a bamboo chip is pressed to the bottom of the blast hole, so as to prevent slag at the bottom of the blast hole from entering the sleeve, wherein the size of the slag is close to the inner diameter of the sleeve, and the appropriate arrangement and blasting effects of the explosives are further guaranteed.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a method for preventing blast holes from collapsing and realizing smooth charge charging. Background technique [0002] Usually, when hard rock is encountered in mining, it is necessary to crush the rock by means of blasting. Rock blasting usually requires dozens or even hundreds of blast holes to be blasted at the same time, so it takes a long time interval from drilling the blast holes to the formation of all the blast holes and the final charge blasting. However, when blastholes are drilled in areas with poor geological environment, such as areas with high ground stress, rock fractures, and rocks that are easily weathered, the earlier formed blastholes are prone to collapse and block the blastholes, making it difficult to successfully charge the blastholes. The blastholes that have been formed thus become waste holes. [0003] At present, there are two ways to deal with the b...

Claims

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Application Information

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IPC IPC(8): F42D3/04F42D1/08
Inventor 房智恒王李管邓星良熊张友彭庆国蒋江晨贺兵红王宝山蒋权凡家杰
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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