Method for communicating goaf inside coal mine underground reservoir and drainage pipeline

Abstract

The communication method comprises the following steps: drawing a contour line of a bottom plate of a coal seam in the coal mine underground reservoir, and determining terrain characteristics of the bottom plate of the goaf in the coal mine underground reservoir; determining the lowest position of a coal seam floor according to the contour line of the coal seam floor in the coal mine underground reservoir, and taking the lowest positions of the coal seam floor close to two sides of a coal pillar as positions for installing drainage pipelines; after a mining roadway of the current working face is formed, drilling is conducted in the position where a drainage pipeline is installed, the drainage pipeline is installed, and the drainage pipeline comprises a first floral pipe, a communicating pipe and a second floral pipe; and the first floral tube is put into the drill hole, and after one end of the communicating tube is connected with the first floral tube, the first floral tube enters the goaf adjacent to the current goaf. The technical problem that in the prior art, collapse and blockage are prone to occurring due to mining influence during drainage between goaf areas, a drainage pipe loses the drainage effect, and water conservancy communication of the goaf areas is affected is solved.

Description

technical field [0001] The invention relates to the field of coal mines, in particular to a method for connecting goafs inside an underground reservoir of a coal mine and a drainage pipe. Background technique [0002] In the process of coal mine production, after the coal seam is mined, a goaf will be formed. Because the roof caving behind the goaf is not dense and there are gaps, there will be water accumulation in the goaf after a period of time. The amount of water accumulation in the goaf is related to the It is related to the degree of water supply near the goaf. Generally, there is water in the goaf, and the longer the time, the more the water will accumulate. Old empty water is one of the main water hazards faced by mines. The old empty water in the upper layer will threaten the mining of the lower coal seam, and the old empty water in the high level and the same layer will threaten the mining of the lower coal seam. [0003] The underground reservoir uses the goaf f...

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Problems solved by technology

[0005] Based on the above problems, the present invention proposes a connection method and drainage pipeline between the goafs inside the coal mine underground reservoir, which solves the problem that the goafs in the prior art are easily collapsed and blocked due to the influence of mining when the goafs are discharged. The drainpipe arranged on the coal pillar only runs through the coal pillar, and the entrance of the drainpipe may be blocked by the caving rock mass, which will cause the drainpipe to lose its drainage function and affect the technical problem of water conservancy connection in the goaf

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