A high-temperature blast hole explosive protection device and its application method

Abstract

The invention discloses a protecting device for explosive in a high-temperature blasthole and a using method of the protecting device. The protecting device comprises a barrel and a barrel cover. One end of the barrel is sealed. The barrel cover covers the other end of the barrel. The barrel comprises an outer barrel and an inner barrel. The outer barrel is arranged on the outer side of the inner wall in a sleeving manner. The inner barrel comprises a viscous water percolation cloth layer, a super absorbent and a breathable cloth layer, which are arranged in sequence from the outside in. The super absorbent is stuck on the viscous water percolation cloth layer. A cartridge filling space is formed in the breathable cloth layer. The protecting device can be used for protecting a cartridge, so that the cartridge can be used in the high-temperature blasthole, and the high-temperature blasthole needs not to be filled with water; the protecting device has a water retention effect, so that the problems of high water consumption, serious water loss, hole collapse and the like are solved; and the protecting device is low in cost, small in thickness, and convenient to operate, the low temperature holding time of the cartridge is long, the high temperature blasting safety can be ensured, and the high temperature blasting efficiency is improved.

Description

technical field [0001] The invention relates to a blasting device and its usage method, in particular to a high-temperature blast hole explosive protection device and its usage method. Background technique [0002] In my country's Ningxia, Xinjiang and other places, there are a large number of coal mine fire areas, resulting in the temperature of most of the blastholes being higher than 60°C during the drilling and blasting operation, making the blasting to be carried out according to the high temperature blasting operation. When the temperature of the blast hole is too high, the thermal decomposition of the explosive will occur, and the form of the explosive will change, resulting in a decrease in the explosive performance of the explosive. In addition, when the heat accumulates to certain conditions, it will burn or even explode, causing casualties and mechanical damage. Therefore, the explosive must be kept in a low-temperature environment for a certain period of time in ...

AI Technical Summary

Problems solved by technology

When the temperature of the blast hole is too high, the thermal decomposition of the explosive will occur, and the form of the explosive will change, resulting in a decrease in the explosive performance of the explosive. In addition, when the heat accumulates to certain conditions, it will burn or even explode, causing casualties and mechanical damage.

Therefore, in the high-temperature hole, the explosive must be kept in a low-temperature environment for a certain period of time. At present, water injection cooling and heat insulation are mainly used, but the effect is not obvious.

In terms of cooling: First, the fire areas are generally located in water-scarce areas such as the west, and the water source is relatively limited; second, there are many cracks in the blast hole, and the problem of water loss is serious; the re-injection of water takes a long time to cool down, which affects the blasting efficiency; finally, the blast hole collapses after water injection The phenomenon of hole blocking often occurs, which poses a great safety hazard

In terms of heat insulation: At present, the heat insulation of explosives is mainly to use heat insulation materials to protect explosives or use materials to turn blastholes into water holes. When heat insulation equipment is used to protect explosives, the heat insulation time is short, and heat insulation equipment is expensive. Heat insulation equipment is generally thicker, and it is easy to get stuck in the blast hole, and the detonating cord can only detonate at the hole; using materials to turn the blast hole into a water hole has complex operations, low operating temperature, and inability to distinguish between different temperatures. Treatment, easy punching, poor blasting effect and other issues

Therefore, due to the above-mentioned shortcomings, the amount of explosives used in the high-temperature blast hole is limited, the high-temperature blasting efficiency is reduced, and the cost is increased.

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