Gas blasting device

Abstract

The invention discloses a gas blasting device which comprises an inner pipe, an inner pipe filling cavity, an ignition mechanism, a first inflation mechanism and an outer pipe, wherein the inner pipe filling cavity is arranged in the inner pipe; the two ends of the inner pipe are in sealing connection with a first inner sealing cover and a second inner sealing cover; the first inner sealing cover and the second inner sealing cover are connected through a connecting piece; the outer pipe is arranged on the outer layer of the inner pipe; a first outer sealing cover and a second outer sealing cover are connected between the inner pipe and the outer pipe in a sealing manner; the ignition mechanism and the first inflation mechanism are mounted on the first inner sealing cover; a second inflation mechanism is mounted on the first outer sealing cover; the sealing cavity between the inner pipe and the outer pipe is an outer pipe filling cavity; the inner pipe filling cavity is filled with supercritical oxygen and carbon-containing organic matters; the outer pipe filling cavity is filled with liquid easy gasifying materials such as liquid carbon dioxide or liquid nitrogen. The gas blasting device has the advantages that the manufacture cost is low, the heat release efficiency is high, the transport security is good and the blast power is high.

Description

technical field [0001] The invention belongs to the technical field of blasters, in particular to gas blasters. Background technique [0002] Gas blasting technology is to use the vaporization and expansion of easily vaporized liquid or solid substances to generate high-pressure gas, which makes the surrounding medium expand to do work and cause fragmentation. It has the characteristics of no open flame, safety and high efficiency. [0003] Carbon dioxide gas blasters are typical blasting equipment in gas blasting technology, and are widely used in mining, geological exploration, cement, steel, electric power and other industries, subways and tunnels, municipal engineering, underwater engineering, and emergency rescue. [0004] The existing gas blaster mainly includes a vaporization liquid storage pipe and a heating detonator installed in the vaporization liquid storage pipe; the heating detonator ignites and generates heat to vaporize easily vaporized substances in the vapo...

AI Technical Summary

Problems solved by technology

[0006] Adopt the gas blaster of above-mentioned detonator structure, existing problem is: 1, the thermal reaction material that needs to fill in the detonator needs to carry out the processing of processes such as material mixing, mixing evenly, rolling material or bagging, filling process It is time-consuming and labor-intensive, and the manufacturing cost is high; 2. During the filling process of the detonator, the oxidant and reducing agent are prone to uneven mixing, resulting in low heat release efficiency; 3. The thermal reaction material needs to be mixed and filled in advance. If the medium temperature is too high, it will easily cause combustion or explosion, which has great potential safety hazards; 4. Due to the damp, deterioration or deformation of the detonating material, it is easy to cause squibs, and it is impossible to determine the cause of the squibs, so it cannot pass The squib method eliminates potential safety hazards; 5. The detonation method of the existing gas blaster uses a solid activator to burn to generate high temperature, which directly conducts heat to the liquid carbon dioxide, causing the liquid carbon dioxide to gasify and expand, and the heat absorption efficiency of the liquid carbon dioxide is low; 6. The detonator The heat release rate is slow, the chemical reaction is insufficient, the heat release efficiency is low, the pressure of the liquid is relatively small after gasification, and the blasting power is small; 7. After the blasting, the reactants in the detonator produce a large amount of toxic and harmful gases. , such as hydrogen sulfide, sulfur dioxide, nitrogen monoxide, nitrogen dioxide and other gases, bring relatively large poisonous pollution to the blasting site

[0008] Yet the weak point that liquid oxygen explosive exists is: 1, it can only be used in open-air operation and building road and bridge, blasting building etc. If it overflows, it will cause pit gas and coal dust explosions in the mine and cause accidents; 2. Liquid oxygen explosives must be used as soon as they are installed, generally within one hour after they are made, otherwise the liquid oxygen will lose its effectiveness when it volatilizes; 3. The charging operation of liquid oxygen explosive is complicated and the safety is poor; 4. The blasting temperature of liquid oxygen explosive is too high, which is easy to cause combustion

[0009] Due to the above shortcomings of liquid oxygen explosive technology, the research and development of liquid oxygen explosive technology is limited. At present, liquid oxygen explosive technology is rarely used

[0010] In addition, in the existing gas blaster, when blasting occurs, the pipe body is easily split into two sections, and the ends of the split ends are easy to fly out; when the gas blaster is used for surface rock blasting, the expanded gas is released to the upper end. , leading to a reduction in rock cracking power; in the existing blasting technology, in order to avoid port leakage, the conventional method is to reserve a hole depth of more than 40cm at the blast hole for filling sand and soil, but this filling method is easy As a result, the surface rock cannot be broken and large rocks are produced, which requires secondary rock breaking in the later stage

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