Pulsating fracturing creep anti-reflection technology and device thereof by taking gas as medium

Abstract

The invention provides a pulsating fracturing creep anti-reflection technology and device thereof by taking gas as a medium. The pulsating fracturing creep anti-reflection technology and device thereof comprises a compressor, a pulsating pump, a gas drainage pump, a pressure controller, a connector, a hole packer, a connection tube, a water-jet scalpel drill hole, the gas medium and the like. Thepulsating fracturing creep anti-reflection technology and device thereof is characterized in that the gas medium permeates and fractures a coal bed along joint fissures of the coal bed, coal bed fissures are increased, gas permeability of the coal bed and gas drainage efficiency are improved, and coal and gas outburst is prevented effectively.

Description

technical field [0001] The invention relates to the technical field of underground gas control in coal mines, in particular to a pulsating fracturing creep anti-reflection technology and device using gas as a medium, and belongs to the technical field of coal mining. Background technique [0002] Gas explosion is one of the disasters that seriously threaten the safety of coal mine production. Due to the change of the crust and the different coal-forming ages, the change of the ground stress makes the gas permeability of the coal seam and surrounding rocks worse, the gas content increases, the relative gas emission increases, and the risk of gas increases. Improving the permeability of the coal seam and effectively discharging the gas in the coal seam is one of the most powerful measures to prevent and control gas coal and gas outburst in the mine area. The gas content and pressure of the coal seam can be reduced through gas drainage, thereby eliminating the hidden danger of...

AI Technical Summary

Problems solved by technology

The problems of this technology are mainly reflected in the following. First, the explosion pressure process cannot be pre-controlled, which will induce coal seam gas outburst

followed by CO 2 Careless installation and operation of heating pipes may cause gas explosion

The third is a large amount of CO 2 Expansion leads to ambient O 2 content reduction

The problems of this technology are mainly reflected in the following. First, due to the existence of cracks, holes and water jet gaps in the coal seam, the high-pressure water injection fracturing process will easily cause the high-pressure water to seal itself in the coal seam, and the coal seam gas will be induced during the coal seam mining process.

Secondly, for some pulverized coal, the immersion of a large amount of water will block the joints and fissures, reducing the permeability of the coal body

The third is that the equipment process is complicated, the installation and transportation are cumbersome, and the overall cost is high

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