A blasting charge structure

Abstract

The invention provides a blasting charge structure. The blasting charge structure comprises an outer shell and sulfur-free black powder filled in the outer shell, wherein a detonating device and / or a detonating powder core are / is arranged in the sulfur-free black powder. The sulfur-free black powder includes, by mass, 80 parts of potassium nitrate and 20 parts of charcoal. The impact sensitivity of the sulfur-free black powder is 0, and the 5s bursting point of the sulfur-free black powder is at the temperature above 600 DEG C. Industrial explosives are further contained between the sulfur-free black powder and the detonating device, the outer shell is tubular, the industrial explosives are filled in the middle in the outer shell, and the sulfur-free black powder is filled between the industrial explosives and the outer shell. The detonating powder core is fixed to the center of the tube body of the outer shell through a plastic cap. An inserting groove is formed in the top of the outer shell, and a detonator is fixed in the inserting groove.

Description

technical field [0001] The patent of the present invention relates to a blasting charge structure, in particular to a blasting charge structure safely used in an open coal spontaneous combustion area. Background technique [0002] my country is the country with the largest coal production and consumption in the world, and it is also the country with the worst coal spontaneous combustion (ie "coal fire") disaster in the world. In 2005, the known spontaneous combustion area of ​​coal in my country had reached 720 square kilometers, and there were 62 burning coal fields and mining areas. Among them, 20 million tons of high-quality coal resources are directly burned by coal field fires every year, and 200 million tons of coal reserves are destroyed. Professor Stracher's research shows that the high-quality coal burned by spontaneous coal fires in China every year is equivalent to 20% of the total energy consumption of the United States. [0003] Spontaneous coal combustion con...

AI Technical Summary

Problems solved by technology

[0006] For the mining of high-temperature open-pit coal rocks, there are three existing methods: one is the blasting construction technology. According to the abnormal situation of gas or smoke in the drill hole during construction, the temperature in the drill hole and the operation area is monitored, and the blast hole is firstly blasted. The blasting can only be carried out by injecting water and cooling down to below 40°C. However, it is very unlikely that the coal rock in the borehole will be cooled below 40°C in actual conditions. The actual field situation found that when the temperature of many high-temperature-resistant explosives exceeds 200°C, the performance will change greatly, resulting in a very unsatisfactory blasting effect, which is a great loss to mining; the third is to use mechanical mining, although it is simple and convenient. , but for most open-pit mining areas, the cost of mechanical mining is relatively high, and the construction intensity is also high

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