A heat-resistant and heat-absorbing protective structure applied in high-temperature blastholes

Abstract

The invention discloses a temperature resistance and heat absorption protection structure applied to the inside of a high temperature blasting hole. The temperature resistance and heat absorption protection structure comprises a blasting device, a water absorbent layer, a pervious material layer, an impervious material layer and a fire resistance and thermal insulation material layer. The pervious material layer enables the water absorbent layer to be fixed on the outer surface of the blasting device. An integrated structure formed by the blasting device, the water absorbent layer and the pervious material layer is placed into the impervious material layer, the fire resistance and thermal insulation material layer is arranged on the outer surface of the impervious material layer in a sleeving mode, and liquid is injected into the gap between the pervious material layer and the impervious material layer. The temperature resistance and heat absorption protection structure overcomes the defects that the potential safety hazards for blasting a high temperature burning area are large, and liquid in a temperature resistance and thermal insulation jacket is likely to run away under the condition that the outer layer structure is damaged, and the severe construction environment requirement at the field can be met; in addition, the structure is suitable for charging blasting with the temperature of the blasting hole being higher than 120 DEG C, and the structure not only is suitable for protecting detonating cords but also is suitable for industrial explosives.

Description

technical field [0001] The invention relates to a heat-resistant and heat-absorbing protective structure, in particular to a heat-resistant and heat-absorbing protective structure applied in high-temperature blastholes, and belongs to the technical field of blasting engineering. 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. The rock fissures in the high-temperature fire area are well-developed, and it is difficult for the water in the blasthole to remain, which makes the temperature of the blasthole rise quickly. Therefore, it is necessary to perform rapid charging, filling, and detonation before the tem...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of the existing high-temperature fire area blasting safety hazards, and the liquid in the heat-resistant and heat-insulating sheath is easy to lose when the outer structure is damaged, and provides a high-temperature blast-resistant sheath. Warm and heat-absorbing protective structure, the heat-resistant and heat-absorbing protective structure is equipped with water-absorbing agent around the blasting equipment and is covered with fire-resistant and heat-insulating materials. After absorbing liquid, the water-absorbing agent will form a paste, and the liquid will not be easily lost when the outer structure is damaged. Therefore, the heat-resistant and heat-absorbing protective structure can meet the harsh construction environment on site. In addition, the heat-resistant and heat-absorbing protective structure can be applied to charge blasting where the blast hole temperature is higher than 120°C. It is not only suitable for protecting the detonating cord, but also suitable for industrial explosives

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