Coal mine goaf accumulated water close-range drainage drilling orifice pipe device and consolidation method thereof

Abstract

The invention relates to a coal mine goaf accumulated water close-range drainage drilling orifice pipe device and a consolidation method thereof. The device comprises an orifice fixing disc, a sleeve, an expansion capsule, an in-pipe plug and a floral pipe; the orifice fixing disc is of a hollow cylindrical table structure; the bottom end of the sleeve penetrates through the orifice fixing disc; the in-pipe plug is arranged in the top end of the sleeve; a plurality of slurry outlet holes are reserved in the upper middle portion of the sleeve; the in-pipe plug is of a cylinder structure; and the sleeve, the expansion capsule and the floral pipe are sequentially connected through drift diameter connectors in a threaded mode. Thus, the coal mine goaf accumulated water close-range drainage drilling orifice pipe device is simple in structure and convenient to operate, the problems that an existing orifice pipe is difficult to consolidate, drilling is prone to blocking, and the occupied time of a drilling machine is long are effectively solved, and by improving the goaf drainage drilling orifice pipe structure, reliable consolidation of the sleeve is achieved, and the occupied time of the drilling machine in the drainage process is shortened.

Description

technical field [0001] The invention relates to the technical field of mine water prevention and control, in particular to a borehole orifice pipe device for short-distance dredging of accumulated water in a goaf of a coal mine and a consolidation method thereof. Background technique [0002] Water accumulation in gobs of coal mines has the characteristics of high water pressure, mixed harmful gases, and high silt content, which threatens the safety of personnel in surrounding mining projects and may cause serious consequences such as submerging working faces and mining areas. During mining activities, it is necessary to use conventional drilling, directional drilling or beam drilling to completely drain the water in the goaf to ensure mine safety. During the construction of various drainage boreholes, the orifice pipe needs to be installed and consolidated with cement to ensure that the orifice pipe is closed and closely connected with the surrounding rock and coal mass. Th...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of device and its consolidation method for dredging the accumulated water in the goaf of the coal mine at a short distance. The hole is easy to be blocked and the drilling rig takes a long time. By improving the orifice pipe structure of the goaf drainage drilling, the reliable consolidation of the casing can be achieved and the drilling rig occupation time can be reduced in the process of water drainage.

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