Low-cost coal and gas co-mining system

Abstract

The invention discloses a low-cost coal and gas co-mining system, and aims to solve the problem of high cost during existing coal and gas co-mining. The product comprises a plurality of fracturing devices and hole sealing devices, the multiple fracturing devices are all fixed in drill holes, the multiple fracturing devices are connected in sequence, the hole sealing devices are connected with thefracturing devices and can seal the drill holes, one end of each hole sealing device is connected with a leading-out rod, and a starting bus connected with a pressure pipeline is fixed to each leading-out rod. By means of the low-cost coal and gas co-mining system, an anti-reflection desorption technology is used, high-concentration and large-flow gas extraction is achieved in a coal seam, the extraction lower limit is reduced to 8 m<3> / t or below, the single-hole extraction efficiency is improved by 10-25 times, the extraction period is greatly shortened, and low-cost coal and gas co-extraction is achieved; and according to the low-cost coal and gas co-mining system, the anti-reflection displacement technology is applied to continuous and rapid tunneling in a coal and gas outburst mine, low-gas operation is achieved in the coal seam, a gas outburst source in the coal seam is safely and effectively relieved, and the mining efficiency is improved by 5-10 times, and the extraction joining period is greatly shortened.

Description

technical field [0001] The invention relates to the field of coal and gas mining, in particular to a low-cost coal and gas co-mining system. Background technique [0002] Coal is a combustible black or brown-black sedimentary rock that usually occurs in rock formations or veins called coal beds or seams. Coal is mainly composed of carbon, together with varying amounts of other elements, mainly hydrogen, sulfur, oxygen and nitrogen. Historically, coal has been used as an energy resource, primarily burned for the production of electricity and / or heat, and also for industrial purposes such as refining metals, or producing fertilizers and many chemical products. [0003] Coal needs to be mined from the coal seam. There is not only coal in the coal seam, but also a large amount of gas. Gas is an important energy source for life and production, and it also needs to be mined. Although the existing mining methods can achieve coal and gas Natural gas is jointly exploited, but the e...

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Problems solved by technology

[0003] Coal needs to be mined from the coal seam. There is not only coal in the coal seam, but also a large amount of gas. Gas is an important energy source for life and production, and it also needs to be mined. Although the existing mining methods can achieve coal and gas Co-exploitation of natural gas, but the extraction cost is high

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