Detonating fuse heat insulating protection device and detonating method

Abstract

The invention discloses a detonating cord heat insulation protection device and a blasting method. The device includes a heat insulation protection cylinder and a pre-embedded wire, the heat insulation protection cylinder is a hollow cylinder, and the pre-embedded wire is arranged on a heat insulation The inner cavity of the protection cylinder extends along the axis of the heat insulation protection cylinder to the outside of the heat insulation protection cylinder. The side wall of the heat insulation protection cylinder includes a water-permeable layer, a water-absorbing layer and a waterproof layer arranged sequentially from outside to inside. The waterproof layer includes a water-proof layer and a rubberized layer arranged in sequence from the inside to the outside. The invention is used to protect the detonating cord, so that the detonating cord can be safely used at high temperature for a certain period of time, which ensures the safety of blasting and solves the problem that the current detonating cord cannot be used at high temperature; secondly, it has strong water absorption, but the total water consumption Supply is not a problem, and it can be applied to high-temperature blasting in a large area to improve blasting efficiency; in addition, it is easy to operate, and the materials used are common products on the market, and the cost is low.

Description

technical field [0001] The invention relates to a heat insulation protection device, in particular to a detonating cord heat insulation protection device and a blasting method, belonging to the field of heat insulation protection equipment. Background technique [0002] In my country, there are a large number of high-temperature blasting projects, such as rock perforation blasting in high-temperature fire areas, high-temperature pyrite blasting, etc. In high-temperature blasting engineering, detonating cord is generally used to initiate explosives, but the temperature of detonating cord is generally lower than 60°C, while the temperature of high-temperature blasting hole is generally higher than 60°C, and the temperature of local blasting hole can reach above 700°C. It can burn or burn quickly at too high a temperature, so that the detonating cord cannot be directly used for high-temperature blast hole detonation. [0003] In order to enable the detonating cord to be used i...

AI Technical Summary

Problems solved by technology

As the temperature of the blast hole increases, it becomes more difficult to cool down the temperature of the blast hole by water injection to below 60°C, and after some blast holes stop cooling, the temperature can rise rapidly, especially in water-scarce regions such as the north, where water injection cooling is more difficult to apply in a large area. Severely limit the blasting output; the second is to use polyethylene pipe and other materials to protect the detonating cord, but due to the impact of polyethylene pipe and other materials on high temperature resistance, inflexibility, and large diameter, it has a short high temperature resistance time, Complicated operation and other conditions lead to greater limitations and risks in the field application process, and are basically not used now; the third is to use high-temperature resistant detonating cords, but the high-temperature-resistant detonating cords currently on the market are mainly used in the petroleum industry. It cannot be applied to blasting in the mining field, and this type of detonating cord is expensive

[0004] It can be seen from the above that none of the current methods can make the detonating cord safe, efficient, economical and practical for high-temperature blasting

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