Microwave system facilitating coal mass gas desorption

Abstract

The invention discloses a microwave system facilitating coal mass gas desorption. The microwave system facilitating coal mass gas desorption mainly comprises a microwave generating device, a power line, a controller, a circulating water cooling device, a gas pipe, a front casing pipe, a slurry injecting bag and a drainage pipeline. The problems that the desorption speed of gas in a coal seam is low and the permeability of the coal seam is low are solved through the microwave system facilitating coal mass gas desorption. The microwave system facilitating coal mass gas desorption is characterized in that a controller emits a signal instruction, the signal is transmitted to the microwave generating device in a drilled hole through the power line, the microwave generating device emits microwaves after receiving the signal so as to generate an electromagnetic field and a temperature field which act on a surrounding coal mass, the desorption speed of gas in the surrounding coal mass is increased, the permeability of the coal seam is increased, then desorbed gas in the coal seam is drained out through the negative pressure drainage pipeline, the expected purpose of gas drainage is realized, and the circulating water bath cooling device is mainly used for cooling the gas subjected to microwave irradiation so as to prevent the temperature of the gas from being too high; and slurry is injected into the slurry injecting bag to achieve a hole sealing effect.

Description

technical field [0001] The invention relates to a system for promoting gas desorption, in particular to a system for promoting gas desorption when gas is pre-extracted from the coal seam under a coal mine. The invention belongs to the field of coal mine safety. Background technique [0002] Most coal mines in my country are high-gas mines, coal and gas outbursts and gas explosion accidents occur frequently, and these accidents cause huge casualties and direct economic losses. Although my country's coal mines have adopted comprehensive control measures against gas, such as: improving ventilation for dilution, establishing high-level pumping lanes, mining protective layers and other measures. However, because most of the coal seams in my country's coal mines are low-permeability coal seams, the desorption efficiency of gas from the coal seams is low, and the efficiency of gas drainage in most coal mines is also low. However, a good gas extraction effect has not been achieved. ...

AI Technical Summary

Problems solved by technology

However, these above-mentioned measures have obvious deficiencies again, for example: the coal seam water injection will deteriorate the environment of the working face and increase the drainage pressure of the mine; Due to the supply problem of gas source, technical and cost constraints, carbon dioxide gas displacement technology is only partially applied at present.

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