Coal seam water injection system based on integration of fracturing and ultrasonic excitation and operation method thereof

Abstract

The invention relates to a coal seam water injection system based on integration of fracturing and ultrasonic excitation and an operation method thereof, and the system comprises a hole sealing subsystem, a fracturing subsystem, an ultrasonic excitation subsystem and a control unit, the hole sealing assembly is arranged in a fracturing drill hole of a coal seam to seal the fracturing drill hole and enable the inner side of the fracturing drill hole to form a closed fracturing space. The fracturing subsystem comprises a fracturing pipe, a fracturing pump, a reflux pipe, a reflux pump, a fracturing flow-back fluid treatment station and a pressure monitoring device; the ultrasonic excitation subsystem comprises an ultrasonic generating power supply, an ultrasonic connecting wire and an ultrasonic transducer, and the ultrasonic generating power supply is arranged outside the fracturing drill hole; and the control unit is electrically connected with the pressure monitoring device, the fracturing pump, the reflux pump and the ultrasonic generation power supply. The device is reasonable and compact in structure, fracturing and ultrasonic excitation are combined, water can be effectively driven to enter finer micropores along a fracture network generated by coal fracturing, and therefore the water injection efficiency and the water injection effect are improved.

Description

technical field [0001] The invention relates to the field of coal seam mining equipment, in particular to a coal seam water injection system based on the integration of fracturing and ultrasonic excitation and an operation method thereof. Background technique [0002] Due to the deep coal mining in my country, the high original stress of coal rock and the low degree of development of pores and fissures significantly reduce the original permeability of the coal seam; the dense and hard coal seam makes the coal seam water injection and dust reduction effect is not good, and the coal mining dust is seriously harmful. At present, hydraulic fracturing technology is mainly used to increase the number of coal seam cracks and enhance the fluidity of coal seam water injection, which can greatly reduce the generation of floating coal dust in the process of coal mining, realize coal mine dust prevention and control, and improve coal mine cleanliness and safe production. Level. [0003...

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Problems solved by technology

[0004] Based on this, the present invention provides a coal seam water injection system based on the integration of fracturing and ultrasonic excitation and its operation method to solve the technical problem that the hydraulic fracturing technology in the prior art still produces a large amount of dust during the mining process

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