Coal seam water injection method of coal mining working face

Abstract

The invention provides a coal seam water injection method of a coal mining working face. The coal seam water injection method of the coal mining working face is characterized by comprising the following steps that before mining operation, an air drill or an air coal drill is used for conducting wet water injection hole punching on a driving working face coal seam, the water injection holes are formed to be perpendicular to a coal wall along the working face, the distance away from the top is no smaller than 0.8 m, and the hole depth is 1.5-6.0 m; a hole packer is used for sealing the water injection holes, a water tube is used for conducting high pressure water injection on the holes, and the water content of the driving coal seam is increased by 1% or more. Dust is removed to the largest extent, so that the dust rate of the driving working face is effectively lowered, and the effect for preventing gas from gushing out on the mining working face is obvious.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a method for injecting water into a coal seam in a coal mining working face. Background technique [0002] During the mining process of coal mines, the coal mining face produces a large amount of dust. For example, under the condition of no dust prevention measures, the dust concentration in the air of the tunneling face during blasting operations can reach 300-500mg / m 3 , when the fully mechanized excavator cuts coal, the dust concentration in the air of the excavation working face is higher, reaching 1000-2000mg / m 3 . In this regard, after a lot of research at home and abroad, a lot of measures and equipment for dust reduction operations for the generated dust have been proposed, which has greatly reduced the dust concentration of the tunneling face, but its dust concentration is still far higher than that in the "Coal Mine The relevant provisions of the "Safe...

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Problems solved by technology

In this regard, after a lot of research at home and abroad, a lot of measures and equipment for dust reduction operations for the generated dust have been proposed, which has greatly reduced the dust concentration of the tunneling face, but its dust concentration is still far higher than that in the "Coal Mine The relevant provisions of the "Safety Regulations" have a great impact on the health of the staff, and also affect the normal and orderly progress of the mining work.

[0003] In Gaotu mines, gas management at the mining face has always been a major problem that plagues production. The main sources of gas are coal seam gas gushing out and goaf gas gushing out. The methods to solve coal seam gas gushing out: one is to rely on coal seam gas Draining pipelines to reduce the gas concentration is a good method, but the construction period is too long and the construction is difficult. It is often necessary to drill holes in advance to arrange gas drainage pipelines under the mining face; The only way to dilute the gas concentration is to dilute the gas concentration by ventilation. In this way, there is a danger of coal and gas protruding during the mining process, which poses a major safety hazard to the life safety of the staff.

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