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Annular linear energy-accumulation cutter

A kind of energy-concentrating cutter and linear technology, applied in blasting and other directions, can solve problems such as unfavorable mining operations, achieve high utilization rate of explosives, reduce gas explosion and fire accidents, and eliminate danger

Inactive Publication Date: 2012-10-17
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not conducive to mining operations because it can only form holes in the coal seam

Method used

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  • Annular linear energy-accumulation cutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Eight-directional semicircular circular linear energy-gathering cutter

[0028] see figure 1 with figure 2 , the constraining shell 1 is a plastic cylindrical tube with a thickness of Φ40mm, a wall thickness of 1mm, and a length of 75mm. Eight copper semicircular tubes 2 of the same length as the constraining shell are placed in turn on the inner periphery of the shell. The diameter of each copper semicircular tube is Φ16mm. The wall thickness is 1mm. The middle of the 8 copper semicircular tubes is ammonium nitrate explosive 3, and its charge density is 1.6g / cm 3 -1.7g / cm 3 within range. The detonating tube 4 is installed in the middle of the ammonium nitrate explosive, and the axis of the detonating cord coincides with the axis of the constraint shell.

[0029] The eight-way semicircular tube linear energy-gathering cutter of the present embodiment is used to cut 45# steel ingot test: a deep hole with a diameter of 60mm is processed on the 45# steel in...

Embodiment 2

[0030] Example 2 Ten-directional semicircular circular linear energy-gathering cutter

[0031] see image 3 with Figure 4 , the constraint shell 1 is a Φ50mm, 1mm thick, and 75mm long plastic cylindrical tube, and 10 plastic circular tubes of Φ16mm, 0.6mm thick, and equal in length to the constraint shell are placed on the inner periphery of the shell. Ammonium oil explosive 3 is used as the main charge. The detonator 4 is installed in the middle of the ammonium oil explosive, and the axis of the detonator coincides with the axis of the constraint shell, and can be directly detonated with a detonating cord.

[0032] Cut the 45# steel ingot test on the ten-way semicircular tube linear energy-gathering cutter of the present embodiment: process a deep hole with a diameter of 60mm on the 45# steel ingot, place the above-mentioned energy-gathering cutter in the middle of the hole and detonate, the result is 10 linear holes with a depth of 13 mm and a diameter of 7 mm are evenly...

Embodiment 3

[0033] Example 3 Eight-direction circular circular linear energy-gathering cutter

[0034] see Figure 5 with Image 6 , the constraining shell 1 is a plastic cylindrical tube of Φ60mm, 0.7mm thick, and 70mm long, and eight copper circular tubes 2 of Φ16mm, 1mm thick, and equal in length to the constraining shell are placed in turn on the inner periphery of the shell. Emulsion explosive 3 is used as the main charge. The detonating tube 4 is installed in the middle of the emulsion explosive, and the axis of the detonating tube coincides with the axis of the constraint shell, and the detonating cord 4 can be directly detonated.

[0035] Carry out cutting 45# steel ingot test to the eight-direction circular circular linear energy-concentrating cutter of present embodiment: process the deep hole that diameter is 70mm on 45# steel ingot, place above-mentioned this energy-concentrating cutter in the middle of this hole and detonate, The result is that 8 linear holes with a depth ...

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Abstract

The invention belongs to the technical field of engineering blasting and discloses an annular linear energy-accumulation cutter. The annular linear energy-accumulation cutter comprises a restraining shell, explosives, liners and a detonation device, wherein the restraining shell is a columnar pipe; a plurality of semi-circular tubular linear liners are arranged inside the shell; notches of the pipes all face towards and are in contact with the inner wall surface of the shell; the outer walls of each two adjacent semi-circular tubes are in tangent mutually; the length of each tube is the same as the length of the restraining shell, and the axes of each tube and the restraining shell are in parallel; a middle space surrounded by the liners is filled with the explosives and is provided with a detonating fuse; the axis of the middle space is coincided with the axis of the restraining shell; the restraining shell and the liners are made of metal materials or plastic materials; and the explosives are common industrial explosives. The annular linear energy-accumulation cutter reasonably utilizes the energy of the explosives and can be used in excavating operation in coals or rocks and generate a plurality of cracks in the coals or the rocks; and the annular linear energy-accumulation cutter is particularly applicable to middle and deep hole pre-cracking blasting of coal seams and can effectively reduce or eliminate the danger of gas burst in the coal seams and prevent or reduce severe mining safety accidents such as gas burst or fire hazard.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of engineering blasting. Background technique: [0003] my country has abundant coal reserves, widely distributed, relatively complex geological conditions, and many coal fields with high gas content. In the process of coal mining, within a short period of time (several minutes), a large amount of coal and gas are suddenly ejected from the inside of the coal wall to the mining face, which is called coal and gas outburst. It is a violent mine gas dynamic phenomenon, which can eject a large amount of gas and coal rocks, destroy shaft facilities, cause personnel suffocation, damage mine ventilation systems, and may even cause major coal mine safety accidents such as gas explosions and fire accidents. [0004] With the extension of coal mining to the deep, the gas content in the coal seam is increasing, while the gas permeability of the coal seam is decreasing. During the extraction process, the gas f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00
Inventor 马宏昊胡晓艳李磊沈兆武颜事龙徐颖
Owner UNIV OF SCI & TECH OF CHINA
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