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A blasting method for controlling damage to rock mass at the edge of blasting area

A blasting area and edge technology, which is applied in the field of blasting to control damage to the rock mass at the edge of the blasting area, can solve problems such as complicated operations and inconspicuous effects, and achieve the effects of expanding production and improving production efficiency

Active Publication Date: 2020-09-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a blasting method for controlling the damage of the rock mass at the edge of the blasting area by using the phase change of liquid carbon dioxide in view of the problems of complex operation and inconspicuous effect in the prior art for protecting the surrounding rock mass during the blasting process

Method used

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  • A blasting method for controlling damage to rock mass at the edge of blasting area
  • A blasting method for controlling damage to rock mass at the edge of blasting area
  • A blasting method for controlling damage to rock mass at the edge of blasting area

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Embodiment 1

[0033] see figure 1 , the diagram is a schematic diagram of blast holes for open-air pre-splitting blasting. Pre-splitting blasting needs to be carried out on the step slope 1 in the diagram. After blasting, it is necessary to ensure that the contour surface formed after blasting is flat. It applies the blasting method of the present invention to control the damage of the rock mass at the edge of the blast area, wherein liquid carbon dioxide is filled inside the blast hole near the edge of the blast area contour line to carry out the cracking blast, and the inside of the main blast hole in the remaining blast area is filled with explosives. blasting.

[0034] The specific blasting operation process is as follows:

[0035] The first step is to complete the drilling of all blastholes in the blast zone.

[0036] In the second step, liquid carbon dioxide is injected into the carbon dioxide packaging tube 5 and sealed at the blasting site, and the carbon dioxide packaging tube 5 ...

Embodiment 2

[0042] see image 3 and Figure 4 , the picture shows the schematic diagram of the blast hole of the pre-splitting blasting in the mine development roadway. It is necessary to carry out smooth blasting on the surrounding rock 1' in the figure to ensure that the empty surface after blasting is as smooth and flat as possible, and the surrounding rock 1' is not blasted. destroy.

[0043] The first step is to complete the drilling of all blastholes in the blast zone. The blastholes inside the blast zone in this embodiment include peripheral holes 11, auxiliary holes 12 and cut holes 13, wherein the peripheral holes 11 are smooth surfaces located at the periphery of the blast zone The blast hole, the auxiliary hole 12 and the cut hole 13 are the main blast hole located in the middle area of ​​the blast zone.

[0044] In the second step, liquid carbon dioxide is injected into the carbon dioxide packaging tube 5 and sealed at the blasting site, and the carbon dioxide packaging tube...

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Abstract

The invention discloses a blasting method capable of controlling blasting area edge rock mass damage. A blast hole, close to an edge rock mass, of a blasting area is filled with liquid-state carbon dioxide, main blast holes in remaining blasting areas are filled with explosive materials for carrying out first-time blasting work, the liquid-state carbon dioxide is filled into the blast hole througha carbon dioxide packaging pipe, detonating explosive materials filled into the same blast hole with the liquid-state carbon dioxide through the carbon dioxide packaging pipe are subjected to stimulating blasting, and the detonating explosive materials and the explosive materials in the main blast holes are subjected to networking blasting. A detonating cord and a small number of detonating explosive materials are used for replacing a stimulation pipe to detonate the liquid-state carbon dioxide, explosive materials used in presplitting and smooth blasting are replaced with the liquid-state carbon dioxide, the explosion energy difficultly controlled is replaced with high-pressure gas energy easily controlled, the difficulty of controlling the surrounding rock damage in the construction process can be greatly reduced, and the method has the advantages of being simple, convenient, safe, reliable, and obvious in effect and is worth of wide application and popularization.

Description

technical field [0001] The invention belongs to mine blasting technology, in particular to a blasting method for controlling damage to rock mass at the edge of a blasting area. Background technique [0002] In order to meet the needs of national economic development, a large number of railways, highways, tunnels, bridges, and mining projects have emerged in recent years. Most of these projects include rock breaking projects. Due to the characteristics of high production efficiency, low labor intensity and low cost of use, drilling and blasting is still the most widely used and most common rock breaking method at present. [0003] The action process of explosive energy breaking rock can be described as: after the explosive is detonated, the detonation pressure is as high as 10 3 ~10 4 The order of magnitude is almost applied to the wall of the blasthole in the form of a sudden load. The rock closest to the charge is strongly compressed, the structure is completely destroye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 史秀志喻智邱贤阳张军辉霍晓锋饶帝军苟永刚李泽宇
Owner CENT SOUTH UNIV