Microwave gain type CO2 phase change cumulative blasting rock breaking system and blasting rock breaking method

Abstract

The invention discloses a microwave gain type CO2 phase change cumulative blasting rock breaking system. The system comprises a liquid CO2 phase change pipe and a heating system for heating liquid CO2in the liquid CO2 phase change pipe; the liquid CO2 phase change pipe comprises a liquid storage pipe, a constant pressure cutting slice assembly and an energy release head; the energy release head is arranged on the lower portion of the liquid storage pipe, and the constant pressure cutting slice assembly is arranged between the liquid storage pipe and the energy release head; and the heating system is a microwave heating system used for emitting microwaves into the liquid storage pipe to heat the liquid CO2 in the liquid storage pipe. The invention further provides a blasting rock breakingmethod using the microwave gain type CO2 phase change cumulative blasting rock breaking system. According to the microwave gain type CO2 phase change cumulative blasting rock breaking system and the blasting rock breaking method, a traditional electric heating mode is replaced with the microwaves, and the advantages of high blasting strength and good rock breaking effect are achieved.

Description

technical field [0001] The invention belongs to the technical field of rock breaking, in particular to a CO 2 A phase change energy-gathering blasting rock breaking system and a method for blasting rock breaking. Background technique [0002] Existing CO 2 Blasting means that when the micro current passes through the high thermal conductivity rod, high temperature will break through the safety film, and the liquid carbon dioxide will be vaporized in an instant, and the rapid expansion will generate a high-pressure shock wave, which will automatically open the pressure relief valve. cause the rock to crack. During this process, no sparks or toxic and harmful gases are generated, and the noise is lower than that of explosive blasting. Due to the advantages of environmental protection, high safety, low noise, fast approval, and the ability to effectively replace explosive blasting, this method is widely used in high gas or coal and gas outburst coal seam mining and subway fo...

AI Technical Summary

Problems solved by technology

The reason is that in CO 2 Due to local heating and gasification during the blasting process, the gasified CO 2 The amount and speed of explosive gas release are limited to a certain extent

In addition, the blasting gas in the energy release port cannot achieve energy accumulation, so the rock near the energy release head is destroyed approximately uniformly. Not only is the blasting power low, but also the blasting effect is poor due to the lack of blasting free surfaces.

In addition, in the rock-breaking process, since the constant-pressure shear sheet is completely destroyed, in this case, the gas release and the blasting process are approximately steady state, which weakens the rock-breaking effect to a certain extent.

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