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High temperature fire zone blasting device and high temperature fire zone blasting method

A fire zone, high temperature technology, applied in the high temperature fire zone blasting device and the high temperature fire zone blasting field, can solve the problems of blasting hole temperature rise, potential safety hazards, restrictions, etc., to avoid potential safety hazards, simple construction operations, and improve efficiency. Effect

Active Publication Date: 2017-03-22
HONGDA MINING IND
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The coal seam spontaneous combustion fire zone in the open-pit coal mine poses a great safety hazard to the blasting construction. At present, the blasting construction of the spontaneous combustion high-temperature fire zone generally uses water injection in the blast hole to lower the temperature of the blast hole to the safe permissible temperature range of ordinary industrial explosives. There are cracks in the rocks in the high-temperature fire zone, which makes it difficult for the water in the blast hole to remain, and the temperature of the blast hole rises quickly. Therefore, it is necessary to perform rapid charging, filling, and detonation before the temperature of the blast hole rises. Therefore, the entire blasting operation The process was very hasty, resulting in a small amount of explosives loaded in a single blasting operation in a high-temperature fire zone, and a large safety hazard, which seriously restricted the progress of the stripping and excavation work
In addition, the existing high-temperature-resistant explosives are very costly and are mainly used in petroleum perforating bullets and military affairs, and cannot be extended to engineering blasting in high-temperature fire areas for the time being.
Patent application number 201410206203.6 discloses a heat-resistant and heat-insulating sheath, which can effectively slow down the temperature rise of the explosive inside the sleeve, but there is a safety hazard that is not easy to detect after the liquid is lost due to the damage of the outer layer structure.
[0003] Chinese Patent Publication No. CN104534948A discloses a rapid construction device suitable for high-temperature fire areas. It slides the charge bag into the blasthole water storage bag, and then opens the end cover of the chute of the blasthole filler to fill the blasthole. However, due to the filling of the blast hole filler, all the water above the water storage bag overflows, thereby affecting the effect of protecting blasting equipment. In addition, auxiliary equipment such as front low brackets and rear high brackets need to be set up during the construction process to support the chute, so the increase On-site construction difficulty and cost

Method used

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  • High temperature fire zone blasting device and high temperature fire zone blasting method

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Effect test

Embodiment 1

[0031] A high-temperature fire area blasting device, comprising a blasthole 1, explosives 2 and a detonating material 3 for detonating the explosive, and also includes a casing arranged in the blasthole, a liquid 4, a bagged plug 5 and a The orifice plug 6 for blocking the orifice of the gun hole; the liquid is injected into the casing, the explosive is soaked in the liquid, and the bagged plug is placed above the explosive and soaked in the liquid , A spare liquid area is formed between the bagged plug and the orifice plug. The orifice plug is a sandbag, the liquid is water, and the explosive is an emulsion explosive.

[0032] The casing can store the liquid in the blast hole, and the liquid can keep the explosive and the detonating material in an environment that does not exceed the temperature of the water bath for a long time, and the bagged plug is used for fast uncoupling plugging And to prevent the explosive from rising after being heated, the orifice plug is used to p...

Embodiment 2

[0040] A high-temperature fire zone blasting method, comprising the following steps:

[0041] Step 1: Drilling, inspection and temperature measurement;

[0042] Step 2: Prepare explosives, detonating materials, sleeves, bagged plugs and orifice plugs in advance at each gun port;

[0043] Step 3: Quickly lower the casing into the blast hole after wetting it, and quickly inject liquid into the casing;

[0044] Step 4: Quickly fill the explosives and detonating materials into the casing filled with liquid and lead the detonating materials to the ground;

[0045] Step 5: Put a bagged plug in the casing after the powder roll is loaded to prevent the explosive from rising after being heated and keep 3.5m of liquid on the top of the bagged plug;

[0046]Step 6: After all the blastholes have been constructed according to steps 2 to 5, the periphery of the blast area should be guarded, and all irrelevant personnel should be withdrawn, leaving only the blasters to work on the network,...

Embodiment 3

[0051] The explosive is No. 2 rock emulsion explosive (hereinafter referred to as the emulsion explosive), which has a diameter of 110mm and a length of 400mm; the sleeve is a fire hose, which is flexible, and its inner diameter is 136mm, and its length is cut according to the depth of the blast hole , the liquid barrier layer of the fire hose is made of PVC, which will not be damaged by high temperature burning under the condition of water, and the thickness is 0.3mm; the fabric layer of the fire hose is made of polyester, which is in the inner layer of the fire hose It can withstand high temperature below 400°C when it is filled with water; the diameter of the blast hole is 140mm, and its temperature range is 60°C-400°C; the bagged blockage is columnar, with a diameter of 110mm and a length of 500mm; the liquid is water, Its specific heat capacity is 4.2×10 3 J / (kg·℃), the boiling point is about 100℃; the detonating cord is the detonating cord, and the length is 12m; The di...

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Abstract

The invention discloses a high-temperature fire zone blasting device and method. The high-temperature fire zone blasting device comprises a blast hole, an explosive, a detonating device used for detonating the explosive, a casing pipe, a liquid, a bagged blockage and an orifice blockage used for blocking an orifice of the blast hole, wherein the casing pipe, the liquid and the bagged blockage are arranged in the blast hole; the liquid is injected into the casing pipe, the explosive is immersed in the liquid, the bagged blockage is arranged above the explosive and immersed in the liquid, and a standby liquid zone is formed between the bagged blockage and the orifice blockage. An existing common detonating device can be applied to high-temperature fire zone blasting, and defects that the potential safety hazard of current high-temperature fire zone blasting is high, the construction is complicated, hidden danger is caused by the fact that the liquid which runs off is difficult to notice after a temperature-resistant and thermal-insulating jacket outer layer structure is damaged and the like are overcome.

Description

technical field [0001] The invention relates to an engineering blasting device and a blasting method, in particular to a high-temperature fire zone blasting device and a high-temperature fire zone blasting method. Background technique [0002] The coal seam spontaneous combustion fire zone in the open-pit coal mine poses a great safety hazard to the blasting construction. At present, the blasting construction of the spontaneous combustion high-temperature fire zone generally uses water injection in the blast hole to lower the temperature of the blast hole to the safe permissible temperature range of ordinary industrial explosives. There are cracks in the rocks in the high-temperature fire zone, which makes it difficult for the water in the blast hole to remain, and the temperature of the blast hole rises quickly. Therefore, it is necessary to perform rapid charging, filling, and detonation before the temperature of the blast hole rises. Therefore, the entire blasting operatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D1/08F42D3/04
Inventor 林谋金郑炳旭李战军张贵峰束学来廖新旭崔晓荣
Owner HONGDA MINING IND
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