Method for taking out hole sealing device

Abstract

A method for taking out a hole sealing device belongs to the field of coal mine excavation equipment and comprises the steps that (1) a water outlet hole is drilled at the position of the side edge of the retained hole sealing device, wherein the position is 200-300 mm away from a water injection hole at which the hole sealing device is located, the axial line of the water outlet hole and the axial line of the water injection hole are parallel in the same direction, and the depth of the water outlet hole is 300 mm larger than the depth of the front end of the hole sealing device; (2) high pressure water on the hole sealing device is started, and water injection is implemented to the hole sealing device retained in a coal seam; (3) the water injection is stopped; and (4) the hole sealing device is taken out. The method for taking out the hole sealing device is characterized in that the hole sealing device retained in the coal seam can be taken out easily, and consumption of materials can be reduced.

Description

technical field [0001] The invention belongs to the field of coal mining equipment, in particular to a method for taking out a hole sealing device. Background technique [0002] The hole sealer is a tool used when injecting water into the coal seam during coal mining. Its two ends are made of metal, and the middle part is a hollow tubular object made of composite rubber. The water pipe has an interface part; when working, put the hole sealer into the hole drilled on the coal seam, connect its rear end to the high-pressure water pipe, start the high-pressure water, and the water will enter the coal seam through the water outlet hole at the front end of the hole sealer; Due to the high water pressure, the water entering the coal seam causes the pressure of the coal seam around the hole sealer to change. In addition, the diameter of the hole sealer is about 50 mm and the length is about 1300 mm, and most of the length is made of composite rubber material. High pressure water ma...

AI Technical Summary

Problems solved by technology

[0002] The hole sealer is a tool used when injecting water into the coal seam during coal mining. Its two ends are made of metal, and the middle part is a hollow tubular object made of composite rubber. The water pipe has an interface part; when working, put the hole sealer into the hole drilled on the coal seam, connect its rear end to the high-pressure water pipe, start the high-pressure water, and the water will enter the coal seam through the water outlet hole at the front end of the hole sealer; Due to the high water pressure, the water entering the coal seam causes the pressure of the coal seam around the hole sealer to change. In addition, the diameter of the hole sealer is about 50 mm and the length is about 1300 mm, and most of the length is made of composite rubber material. High pressure water makes The pressure of the coal seam increases, and the pipe made of composite rubber material deforms. After water injection, the hole sealer cannot be taken out in the hole, and is trapped in the hole. Forcibly pulling the hole sealer will cause the hole sealer to break, and a large amount of hole sealer will be wasted.

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