Cold Blasting Method of Liquid Carbon Dioxide in Closed Blasting Hole
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A technology of liquid carbon dioxide and carbon dioxide, which is applied in blasting and other directions, can solve the problems of low blasting power and high cost, and achieve the effect of high blasting power, simple and convenient construction, and easy promotion
Active Publication Date: 2018-09-25
DALIAN UNIV
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[0006] In view of the above-mentioned defects in the prior art, this application provides a liquid carbon dioxide cold blasting method for sealing a blast hole, which involves injecting liquid carbon dioxide directly into the blast hole without using a burst tube, sealing the blast hole with a hole sealer, and then injecting liquid carbon dioxide. The cold blasting solves the technical problems of low blasting power and high cost in the liquid carbon dioxide cold blasting technology, and is an optimization and improvement of the existing liquid carbon dioxide cold blasting technology
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Embodiment 1
[0027] This embodiment provides a liquid carbon dioxide cold blasting method for a closed blast hole, and the specific steps are as follows:
[0028] S1: According to the needs of rock blasting, design parameters such as the number of blast holes, hole layout, hole size, depth, azimuth, inclination, etc., and drill blast holes on the rock to be blasted to complete the blast hole construction;
[0029] S2: Clean up the drilled rock blast holes to ensure that there are no residual broken rocks and other foreign matter in the holes;
[0030] S3: Install the hole sealing device, put the end of the hole sealing device with the detonator deep into the hole, the rubber part of the shell is completely submerged in the hole, and the high pressure liquid injection port, carbon dioxide liquid injection port, and lead pipe port are reserved outside the blast hole ;
[0031] S4: The high-pressure liquid injection port is connected to the high-pressure liquid injection gun, and the hole se...
Embodiment 2
[0036] This embodiment provides a sealing device used in Embodiment 1, including: a housing, a lead tube, an initiator, an initiator wire, a high-pressure liquid injection port, a carbon dioxide liquid injection port, and a carbon dioxide liquid injection pipe; a high-pressure liquid injection The mouth, the carbon dioxide injection port, and the lead tube are placed at one end of the shell. The lead tube runs through the entire shell and protrudes from the other end of the shell. The end is equipped with a detonator. The lead tube is connected with the lead tube, and the carbon dioxide injection The pipe runs through the whole shell, and the carbon dioxide liquid injection port communicates with the carbon dioxide liquid injection pipe; the wire of the detonator is placed in the lead pipe and connected with the detonator.
[0037] Preferably, the carbon dioxide liquid injection port is located between the high-pressure liquid injection port and the lead pipe port.
[0038] Pr...
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Abstract
The invention provides a cold blasting method using liquid carbon dioxide in enclosed blast holes. The method comprises following steps: firstly, a blast hole is drilled in rocks to be blasted; then a hole sealing device is mounted, wherein one end, provided with an initiator, of the hole sealing device is placed into the hole and the hole sealing device is totally immerged in the hole; a high pressure liquid injection port, a carbon dioxide liquid injection port and a lead nozzle are kept outside the blasting hole in advance; the high pressure liquid injection port is connected with a high pressure liquid injection gun; the hole sealing device is injected with liquid and expands to block the blast hole; the carbon dioxide liquid injection port is connected with a liquid carbon dioxide injection pipe; quantified liquid carbon dioxide is injected to the blast hole according to blasting design requirement; initiator leads which are pre-kept at one side of the lead nozzle are connected in a parallel mode; the initiator is electrified for blasting the liquid carbon dioxide in the blasting hole to complete blasting. The blasting power of the invention is great and the initial investment and use cost for blasting are reduced; the construction is simple and convenient; the method is easy to promote.
Description
technical field [0001] The invention belongs to the field of construction blasting, and is suitable for engineering industries requiring blasting construction in building demolition, tunnel excavation, and rock breaking in mines, and specifically relates to a liquid carbon dioxide cold blasting method for a closed blast hole. Background technique [0002] In today's world buildings, tunnels, mine rock-breaking, and mining construction techniques, in addition to mechanical rock-breaking construction, it is explosive blasting construction, such as explosive detonators; the former is very inefficient, and the latter is extremely dangerous, and it is easy to cause the loss of explosives. Major terrorist cases. For example, a series of 18 explosions occurred in Liuzhou, Guangxi on September 30, 2015, killing 11 people and injuring 51. This is a major criminal case. The perpetrator Wei Yinyong had conflicts with nearby villagers and related units due to quarrying production, and ...
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