Underground fire prevention and grouting nitrogen injection pipeline in coal mine and its removal method when withdrawing

Abstract

The invention provides an underground coal mine fire-control grouting nitrogen-injecting pipeline and a removal method thereof in withdrawal, belongs to the technical field of fire control for an underground coal mine fully-mechanized face and mainly solves the problems that a progress distance of the fully-mechanized fail to match with a fixed-specification fixed-size steel pipe during recovery, the pipeline being buried or crushed is highly difficult to remove, danger level of removal is high, and waste of materials is severe. The underground coal mine fire-control grouting nitrogen-injecting pipeline comprises a tail support guard, an auxiliary haulage way grouting pipe and an auxiliary haulage way nitrogen-injecting pipe. The underground coal mine fire-control grouting nitrogen-injecting pipeline further comprises a grouting hose, a nitrogen-injecting hose, a tail fixed nitrogen-injecting pipe and a tail fixed grouting pipe; the tail fixed nitrogen-injecting pipe and the tail fixed grouting pipe are fixed on the side of a base of the tail support guard and are connected with the auxiliary haulage way grouting pipe and the auxiliary haulage way nitrogen-injecting pipe through the grouting hose and the nitrogen-injecting hose, respectively. The removal method includes: withdrawing the tail support guard, measuring a withdrawal distance, and removing the auxiliary haulage way grouting pipe and the auxiliary haulage way nitrogen-injecting pipe.

Description

Technical field [0001] The invention belongs to the technical field of fire prevention and fire prevention for fully mechanized coal mining faces in underground coal mines, and particularly relates to underground mine fire prevention and fire prevention grouting and nitrogen injection pipelines and a method for dismantling them during withdrawal. Background technique [0002] During the mining process of the fully mechanized mining face, a 4-inch grouting pipe and a 2-inch nitrogen injection pipe were laid in the auxiliary transport lane. According to regulations, the two pipelines must extend into the old pond. As the mining advances, There are two problems to be solved when removing two pipelines one by one. One is that the length of the pipeline is fixed at 6m each, and the advancing distance cannot meet this size immediately. If it is dismantled if it is less than 6m, it will violate the regulations and the pipeline cannot be extended. Enter the Laotang; second, if the advanc...

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Problems solved by technology

[0002] During the recovery process of the fully mechanized mining face, a 4-inch grouting pipe and a 2-inch nitrogen injection pipe were laid in the auxiliary transportation lane. According to regulations, the two pipes must be extended into the old pond. To dismantle two pipelines one by one, there are two problems that need to be solved urgently. One is that the length of each pipeline is fixed at 6m, and the advancing distance cannot meet this size in real time. into the old pond; second, if the advancing distance is greater than 6m, then most of the pipelines must be in the old pond, or buried, or crushed, the demolition is difficult, the degree of danger is high, and the waste of materials is serious

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