Thin coal seam bedding long drill hole extraction system and method

Abstract

The invention discloses a thin coal seam bedding long drill hole extraction system and method, and relates to the technical field of coal mine drill hole extraction, and the system comprises an in-hole structure, a first connecting pipe, a second connecting pipe, a third connecting pipe, an air supply system, an extraction system and a deslagging and drainage system; the in-hole structure comprises an extraction pipe and an air blowing pipe which are tripped into a drill hole, the air outlet end of the air blowing pipe is located in the extraction pipe, and the air inlet end of the air blowing pipe communicates with the air supply system through the first connecting pipe; the extraction pipe is communicated with the extraction system through a second connecting pipe extending towards the upper portion of the drill hole and communicated with the deslagging and drainage system through a third connecting pipe extending towards the lower portion of the drill hole. The device has the advantages that the gas, water and slag separation effect is improved, and the problems of water accumulation in the extraction pipe and unsmooth drilling in the drilling extraction process are thoroughly solved.

Description

technical field [0001] The invention relates to the technical field of coal mine drilling, in particular to a thin coal seam long drilling system and method. Background technique [0002] When the thin coal seam is extracted by long drilling along the layer, there will be coal powder and accumulated water in the hole, which is easy to block the hole protection casing. In order to solve the problem of water accumulation, the existing drilling drainage system is provided with a drainage system. For example, the patent document with the publication number CN202810933U discloses a downward drilling drainage system, which includes a sealing pipe, a drainage pipe, and a compressed air. Pipe and drain, the air outlet end of the pressure air pipeline is arranged in the sealing pipe and extends to the lower part of the sealing pipe, the upper end of the sealing pipe is connected with the extraction pipeline, and the water inlet of the drain is connected with the extraction pipeline. ...

AI Technical Summary

Problems solved by technology

The existing borehole drainage system first pumps out the gas and accumulated water through the drainage pipeline at the same time, and then separates the accumulated water. The separation effect of gas, water and slag is poor

In addition, in the past, the thin coal seam drilled along the bedding is prone to difficulties in sealing holes and easy air leakage in the sealing section.

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