ULtrasonic coaL-bed gas desorption extraction drainage method

Abstract

The invention discLoses an uLtrasonic coaL-bed gas desorption extraction drainage method. The method comprises the foLLowing steps that 1, according to actuaL engineering conditions, an injection-drainage type uLtrasonic coaL-bed gas desorption extraction drainage device and support equipment are seLected, wherein the support equipment comprises a driLLing machine with the aperture matched with that of a protective pipe head, a Liquid pump with the matched capacity and workLoad, a Liquid injection pump, a sLag-Liquid separation tank and an extraction pump; 2, the uLtrasonic coaL-bed gas desorption extraction drainage device is connected with the Liquid pump, the Liquid injection pump, the sLag-Liquid separation tank and the extraction pump in sequence; 3, the injection-drainage type uLtrasonic coaL-bed gas desorption extraction drainage device stretches into a gas extraction channeL for testing, and it is ensured that aLL the parts normaLLy work; 4, the pLugging Length is determined according to requirements, and pLugging mud is put inwards for seaLing; 5, according to the procedure, water is injected; 6, water is drained according to the procedure; 7, aLL the devices are turned off, the pLugging mud is removed, the injection-drainage type uLtrasonic coaL-bed gas desorption extraction drainage device is removed, and work for one gas extraction channeL is finished.

Description

technical field [0001] The invention relates to a coalbed methane ultrasonic desorption drainage method, relates to the field of energy exploitation, in particular to the technical field of coalbed methane mining drainage. Background technique [0002] A large amount of mine water seepage often accumulates in the drilling holes of the downward drainage of high-gas coal seams in existing mines. Due to the small diameter of the drilling holes and the large depth of the drilling holes, it is difficult to discharge the accumulated water in the holes, thus blocking the fissure channels for gas flow in the coal seams. At the same time, in the soft coal seam, long-term water accumulation in the borehole will easily lead to the collapse of the hole wall, and then cause the hole to collapse, affecting the gas drainage work. At the same time, some coalbed methane ultrasonic desorption extraction devices have no fixed channel for drainage, and the drainage is unreasonable, and the wate...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the operation method of self-designed ultrasonic coalbed methane desorption extraction and drainage device is not clear, and the extraction efficiency cannot be maximized, the present invention proposes a coalbed methane ultrasonic desorption extraction and drainage method. The coalbed methane desorption extraction device is used. This method optimizes the water injection and drainage process, and separates the water and air slag from the discharged water to maximize the extraction efficiency.

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