Water-stopping method and water-stopping casing for coal mine prospecting and discharging casing

Abstract

Disclosed are a sleeve water stopping method for coal mine water exploration and drainage and a water stopping sleeve which are mainly applied to water outlet control over exploration and drainage of accumulated water of an upper-layer coal goaf or accumulated water of the-same-layer coal old goaf of a coal mine. The method comprises the steps that (1), the water stopping sleeve with a left-handed welded rib is manufactured, a flange plate is welded to the bottom of the water stopping sleeve, and a wooden plug is added on the top of the water stopping sleeve; (2), a mounting hole is drilled in a coal bed; (3) an anchoring agent is put into the mounting hole; (4), a water exploration drill rod and the water stopping sleeve are connected, the water exploration drill rod is utilized to drive the water stopping sleeve and push the water stopping sleeve into the bottom of the mounting hole; (5), the water exploration drill rod is rotated to drive the water stopping sleeve to stir the anchoring agent; and (6), a control valve is mounted on the flange plate of the water stopping sleeve to continue to explore water. A grouting pump and a grouting material are not need, and labor is saved; and after almost 50 times of tests of a plurality of working faces, it is proved that the water stopping sleeve is convenient to mount, reliable in performance, economical and practical.

Description

technical field [0001] The present invention is mainly used in coal mine prospecting, after the water accumulation in the goaf of the upper layer of coal or the accumulation of water in the old empty space of the same layer of coal, the water is controlled and installed as a water stop device. Background technique [0002] With the depletion of coal mine resources, coal mines are gradually transferred to the mining of lower seam coal or small area mining areas (due to the destruction of small coal mines), flooding will become a major source of danger. The country has specially formulated the principle of "explore where there is excavation, and where there is mining". However, after the water is excavated, the water inflow from the discharge hole will suddenly increase (the accumulated water will have high pressure in a confined space), and the water-stop casing If the installation is not firm, the water cannot be stopped or controlled in time, resulting in well flooding or i...

AI Technical Summary

Problems solved by technology

[0004] 1. The supporting grouting pump (mortar) needs to be at least 30,000 yuan, the chemical slurry pump is more expensive, and the chemical AB material or special sealing expansion material is more than 5,000 tons per ton

[0005] 2. The process is cumbersome, there are many requirements such as sealing both ends of the casing, the slurry must be injected in proportion, and the setting time of the slurry is long

[0006] 3. The strength and sealing effect are not good, which can only be guaranteed by extending the casing and sealing length, and it takes time and effort to connect the casing

[0007] 4. After the slurry is solidified, it is easy to produce cracks, which need to be checked frequently.

[0008] 5. It is very troublesome to clean and maintain the grouting pump and pipeline. If the cleaning is not good, the pump will be damaged due to pipe blockage

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