Coal mine underground water guiding borehole packer

Abstract

The invention discloses a coal mine underground water guiding borehole packer. The coal mine underground water guiding borehole packer comprises a hollow pipe body, polyurethane pipes, circular metalgaskets, fastening nuts, a pipe fixing ring, a guiding head, an injecting pipe, a grouting pipe, a water pipe, a liquid pressurizing device, a slurry pressurizing device and a water pressure gauge, wherein the guiding head is fixed to the front end of the hollow pipe body through a thread, the four polyurethane pipes are fixed on the hollow pipe body through the circular metal gaskets and the fastening nuts, the injecting pipe, the grouting pipe and the water pipe are located in the hollow pipe body, the injecting pipe is externally connected with the liquid pressurizing device, the grouting pipe is externally connected with the slurry pressurizing device, and the water pipe is externally connected with the water pressure gauge. The coal mine underground water guiding borehole packer is provided for the shortage of existing coal mine underground borehole plugging equipment, combines temporary sealing with permanent sealing to improve the quality of borehole plugging, and can display the water pressure change in a borehole in real time to provide early warning for coal mine permeation.

Description

technical field [0001] The invention relates to the plugging of boreholes in coal mines, and belongs to the technical fields of rock mechanics and engineering. Background technique [0002] In the process of coal mining, some mining coal seams are seriously threatened by water hazards. At present, the coal seams mined in this situation are generally implemented with floor aquifer grouting reformation, and grouting is carried out after the drilling and grouting is completed. When it is too large, this kind of sealing measures will be greatly ineffective. It will take time for the mud to solidify to meet the sealing requirements, and when the water pressure is high, it will affect the mud sealing effect, resulting in a large safety hazard in drilling. Once the mine pressure appears And other mine activities, it is easy to cause drilling water diversion, and water accidents will occur, thereby increasing mine drainage costs, increasing raw coal costs, affecting normal productio...

AI Technical Summary

Problems solved by technology

[0002] In the process of coal mining, some mining coal seams are seriously threatened by water hazards. At present, the coal seams mined in this situation are generally implemented with floor aquifer grouting reformation, and grouting is carried out after the drilling and grouting is completed. When it is too large, this kind of sealing measures will be greatly ineffective. It will take time for the mud to solidify to meet the sealing requirements, and when the water pressure is high, it will affect the mud sealing effect, resulting in a large safety hazard in drilling. Once the mine pressure appears Other mine activities will easily lead to drilling water diversion, and water accidents will increase mine drainage costs, increase raw coal costs, affect normal production, and even endanger mine safety

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