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Mixed Charge Structure, Charge Method and Its Blasting Application

A technology of mixed charge and charge, applied in the field of blasting, can solve the problem of high powder ore output rate, achieve the effects of reducing explosion pressure, small vibration and impact, and controlling surrounding rock damage

Active Publication Date: 2020-12-22
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a new type of mixed charge structure, charge method and its blasting application in view of the problem of high powder ore output rate in the existing explosive blasting production

Method used

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  • Mixed Charge Structure, Charge Method and Its Blasting Application
  • Mixed Charge Structure, Charge Method and Its Blasting Application
  • Mixed Charge Structure, Charge Method and Its Blasting Application

Examples

Experimental program
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Embodiment 1

[0044] see figure 1 , the figure shows blasting for hard rock open-air steps, the step slope 1 is hard rock, and the blast hole is drilled downward from the top of the step. A specific embodiment of the mixed charge structure in the present invention is adopted, wherein the blast The hole is filled with carbon dioxide packing tube 2 and charge 4 in sections, wherein the carbon dioxide packing tube 2 is located at the bottom of the blast hole, and liquid carbon dioxide is injected inside to form a liquid carbon dioxide segment, and the charge 4 is filled in the blast hole above the carbon dioxide packing tube 2, An explosive section is formed, and the blast hole top above the explosive section is sealed by drill cuttings 5 ​​. The charge inside the explosive section is embedded with a detonator 3 and drawn out to the outside of the blasthole to connect with the detonating equipment through the detonating foot wire. When detonating, the charge package 4 in the explosive section...

Embodiment 2

[0051] see image 3 , the diagram shows that blasting is carried out on the open-air steps of soft rock, the step slope 1 is soft rock, and the blast hole is drilled downward from the top of the step, and another specific embodiment of the mixed charge structure in the present invention is adopted, wherein Fill the blasthole with carbon dioxide encapsulating tube 2 and charge 4 in sections, wherein the charge 4 and the detonator 3 of the priming charge 4 are located at the bottom of the blasthole to form an explosive section, and the carbon dioxide encapsulating tube 2 is filled in the blasthole above the explosive section Inside, liquid carbon dioxide is injected inside to form a liquid carbon dioxide section, and the top of the blast hole above the liquid carbon dioxide section is sealed by drilling cuttings 5 ​​. The charge inside the explosive section is embedded with a detonator 3 and drawn out to the outside of the blasthole to connect with the detonating equipment throu...

Embodiment 3

[0055] see Figure 4 , which is another specific embodiment of using the mixed charge structure of the present invention in VCR method blasting. At least two sets of carbon dioxide packing tubes 2 and at least two sets of charge packs 4 are filled inside the blasting blast hole, wherein the carbon dioxide packing tubes 2 and charge packs 4 are filled alternately and segmented, and the top of the blasting hole is blocked by drilling cuttings .

[0056] The structure of the carbon dioxide encapsulating tube 2 is the same as that in the first and second embodiments, and will not be repeated here in this embodiment. The detonating components of all explosives in this embodiment are the detonating cords 6 wound and arranged on the carbon dioxide encapsulating tube 2 and the charge 4 in sequence, and the detonating cords 6 are connected to the outside of the blasthole and detonated by the detonator 3, and the detonating cords 6 are detonated. The explosives in all the charge packs...

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Abstract

The invention discloses a mixed explosive charging structure, an explosive charging method and blasting application of the mixed explosive charging structure and the explosive charging method. The interior of a blast hole is filled with a liquid carbon dioxide section and an explosive section in a subsection mode. The liquid carbon dioxide section is a carbon dioxide packaging pipe, and liquid carbon dioxide is packaged inside the carbon dioxide packaging pipe. The explosive section is an explosive bag, and is connected in an explosion initiation mode through an explosion guide part. The physical energy generated by the explosion of the explosive section destroys the carbon dioxide packaging pipe, the heat energy generated by the explosion of the explosive section motivates the liquid carbon dioxide to conduct the phase change inside the blast hole, and the carbon dioxide gas and the explosion gas generated by the explosion of the explosive section achieve the explosion inside the blast hole together. The mixed explosive charging structure, the explosive charging method and the application of the mixed explosive charging structure and the explosive charging method in the lateral ore caving explosion have the advantages of being low in fine ore output rate, easy to use, low in blasting vibration, low in cost, high in energy utilization rate, uniform in blasting lumpiness and little in edge wall damage.

Description

technical field [0001] The invention belongs to blasting technology, and in particular relates to a mixed charging structure using explosives and liquid carbon dioxide, a charging method and a blasting application. Background technique [0002] In view of the high production efficiency, low labor intensity, and low cost of engineering blasting, drilling blasting is still a rock-breaking method commonly used in related fields such as mines, highways, and tunnels at home and abroad. However, with the refinement of blasting technology, the complexity of construction conditions, and the quantification of engineering standards, explosive blasting with high engineering risks and serious negative effects can no longer meet all on-site needs. For example, in many low-grade mines, In the process of deep hole mining of thick and large ore bodies, excessive crushing of rocks will occur during the process of drilling deep holes for lateral blasting and collapsing, which will lead to a h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D3/04F42D1/00F42D1/02F42D1/08F42D1/22F42D5/045
CPCF42D1/00F42D1/02F42D1/08F42D1/22F42D3/04F42D5/045
Inventor 史秀志喻智饶帝军邱贤阳田志刚黄沛生霍晓锋张军辉
Owner CENT SOUTH UNIV