High-temperature blast hole thermal insulation sheath, blasting assembly and construction method

Abstract

The invention provides a high-temperature blast hole thermal insulation sheath comprising a sheath body. The high-temperature blast hole thermal insulation sheath is characterized in that the sheath body comprises an outer thermal insulation layer, a middle thermal insulation layer and an inner thermal insulation layer which are sequentially bonded into a whole from outside to inside; the outer thermal insulation layer, the middle thermal insulation layer and the inner thermal insulation layer are made of tin foil paper, thermal insulation compressed powder materials or super-thermal insulation blankets and ceramic fibers respectively; a charging cartridge made of kraft paper is further arranged in the sheath body, an upper cover and a lower bottom are arranged at the upper end and the lower end of the charging cartridge respectively, and the lower bottom is a flat bottom or an arched bottom. The invention further provides a blasting assembly comprising the thermal insulation sheath and a construction method. According to the thermal insulation sheath, the blasting assembly and the construction method, blasting safety hidden danger is eliminated under the high-temperature blast hole condition, the construction process is simple, reliability is high, cost is saved, and large-scale construction operation can be achieved.

Description

technical field [0001] The invention relates to the field of blasting in a high-temperature fire zone, in particular to a heat-insulating quilt used in a high-temperature fire zone for a high-temperature blast hole, a blasting component and a blasting construction method. Background technique [0002] In my country's Xinjiang, Inner Mongolia, Ningxia, Shanxi and other areas where coal seams are buried shallowly, more and more coal mines use open-pit mining. Due to the outcropping of the coal seam in the open-pit coal mine, the spontaneous combustion zone of the coal seam and the airtightness of the goaf are not strict, and the air enters to form a spontaneous combustion zone, resulting in the formation of a large number of high-temperature blastholes. The "Blasting Safety Regulations" stipulates that blasting operations with a blasthole bottom temperature higher than 60°C are high-temperature blasting. When the blasthole temperature exceeds 60°C, special blasting safety mea...

AI Technical Summary

Problems solved by technology

However, the heat insulation effect of this structure is quite poor, and in the ultra-high temperature blast holes as high as 150-300°C or above, this heat insulation measure cannot achieve the desired effect

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