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Tamping bar for deep hole blasting charge

A technology of deep hole blasting and charging, which is applied in blasting and other directions, can solve the problems of gun stick falling off and charging failure, and achieves the effect of convenient drilling and avoiding charging failure or safety accident.

Inactive Publication Date: 2016-06-01
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present disclosure is to provide a gun stick for deep hole blasting charge, which can overcome the defect that the existing gun stick is easy to fall off in the blast hole, thus causing charge failure

Method used

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  • Tamping bar for deep hole blasting charge
  • Tamping bar for deep hole blasting charge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The depth of the blasthole is 95m, the diameter of the blasthole is 102mm, and the diameter of the explosive grain is 75mm. The diameter d1 of the front end of the variable-diameter nozzle is selected as 75mm, the diameter d2 of the rear end is 38mm, the diameter of the pipe body is 38mm, and the length of a single pipe body is 2000mm. Choose No. 8 iron wire to connect the variable-diameter gun head and each tube body. If you connect 55 single tubes with a length of 2000mm, you can form a deep-hole gun stick with a length of about 110 meters.

Embodiment 2

[0049] The depth of the blasthole is 30m, the diameter of the blasthole is 89mm, and the diameter of the explosive grain is 60mm. The diameter d1 of the front end of the variable-diameter gun head is selected as 60mm, and the diameter d2 of the rear end is 32mm. The diameter of a single tube is 32mm, and the length of the tube is 1800mm. Choose nylon rope to connect the variable diameter gun head and each pipe body. If you connect 20 single pipes with a length of 1800mm, you can form a deep hole gun stick with a length of about 36 meters.

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Abstract

A tamping bar for deep hole blasting charge comprises a variable diameter tamping head (1), a plurality of tube bodies (2), a lower joint (5) and a flexible connecting part (3). The variable diameter tamping head comprises a front end with the diameter being d1 and a rear end with the diameter being d2, wherein d1 is greater than d2. The tube bodies are sequentially connected in an end-to-end mode, the tube body at the forefront end is connected to the variable diameter tamping head, and the outer diameter of the tube bodies is d3. The lower joint is arranged at the connecting position of the corresponding adjacent tube bodies and used for connecting the adjacent tube bodies. One end of the flexible connecting part is connected to the variable diameter tamping head (1), and the flexible connecting part penetrates through the multiple tube bodies (2). The high-strength flexible connecting part is arranged in the tube bodies of the tamping bar and penetrates through the ends of the tube bodies so that it can be guaranteed that broken tube bodies are not likely to fall into tamping holes, and charge failures or safety accidents are avoided.

Description

technical field [0001] The disclosure relates to the field of deep-hole blasting in tunnel engineering, shaft engineering, and forced caving in coal mining, and in particular to a gun stick used for charging charges in deep-hole blasting. Background technique [0002] At present, the blasting construction in the deep part of the coal mine underground roadway, the deep hole loosening blasting construction, the forced caving deep hole blasting of the huge thick roof of the coal mining face, and the deep hole loosening blasting of the coal seam all use ultra-deep blastholes for charge blasting construction. The depth is generally between 10 meters and 100 meters, or even deeper. In deep hole blasting, the gun rod for charge is the key to charge the charge. [0003] The existing deep hole blasting charge sticks mainly have the following disadvantages: (1) Although the pipe body and the upper and lower joints are connected by PVC glue or inner and outer screw holes, due to the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08
CPCF42D1/08
Inventor 宋俊生杨仁树
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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