Coal seam water injection system

Abstract

The invention discloses a coal seam water injection system which comprises a pulse power subsystem and a water injection subsystem, wherein a water outlet of the water injection subsystem is communicated with a coal seam to be subjected to water injection of a set area so as to inject water into the coal seam to be subjected to water injection; and a liquid outlet of the pulse power subsystem is communicated with the coal seam to be subjected to water injection of the set area so as to provide hydraulic pulse to the coal seam to be subjected to water injection. According to the coal seam water injection system, the water injection of the coal seam with poor air permeability can be effectively realized, and the coal seam water injection system has the advantages of simple water injection operation and good effect.

Description

technical field

[0001] The invention relates to water injection technology, in particular to a coal seam water injection system. Background technique

[0002] More than 90% of the gas in the coal seam exists in the pores and fissures of the coal seam in the form of adsorption. In the unmined or undisturbed coal seam, the gas maintains a dynamic adsorption equilibrium. When the coal seam is mined, the cracks in the coal seam are exposed, and the balanced gas storage state is broken. A large amount of gas is continuously desorbed from the coal seam, and migrates to the roadway or the working surface through the pores, micro-cracks, and fissures in the coal seam. At present, most coal mines use high-power shearers and fully-mechanized top-coal caving mining technology. In the case of low water content in each layer, the amount of coal dust will increase, which not only poses a threat to safe production, but also deteriorates the production environment. directly damage the he...

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