Soft and broken seam drilling and reaming device

Abstract

The invention discloses a soft and broken seam drilling and reaming device which comprises a bracket, a power drive device, a rotary seal water supply an air supply device, a guide support frame, a drill connector, a hole protecting tube, a center reflux drill, an inner chip removal drill pipe and a slag collecting container; the hole protecting tube sleeves the outside of the inner chip removal drill pipe; and a plurality of gas discharge holes are uniformly distributed on the tube wall of the hole protecting tube. A drill hole is supported during drilling and reaming operation, so that collapse and contraction are avoided and extraction of a drilling tool is affected. High-pressure airflow of the rotary seal water supply an air supply device pushes flow to reach the center reflux drill and water slag is discharged outwards through the inner chip removal drill pipe. A formed hole is prevented from being destroyed by an outer chip removal flow and the drill when the drill is pulled out, the problems that the formed hole is easy to slump and contract and the gas is not easily discharged in a soft and broken seam can be effectively solved and the gas extraction quality is improved. The construction speed of a gas extraction hole is improved, the construction security is ensured and the soft and broken seam drilling and reaming device is an innovation of the soft and broken seam drilling and reaming device.

Description

technical field [0001] The invention belongs to the technical field of drilling construction for gas drainage in coal mines, and in particular relates to a drilling and reaming device for soft and broken coal seams. Background technique [0002] Gas drainage technology is a necessary guarantee for mine gas safety control. Affected by the coal seam itself, safe and reliable gas drainage must be premised on pore-forming technology. For a long time, the difficulty of forming holes in soft and broken coal seams has been the main technical problem restricting its efficient gas extraction. At present, gas drainage and forming holes are achieved by using drill bits and drill rods to lengthen them. The soft and broken coal seam has the characteristics of soft coal quality, poor permeability, and high gas pressure, which makes the holes prone to shrinkage and collapse, which causes the problem of coal seam stuck holes, making the drilling tools unable to be pulled out, and even dama...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies in the prior art, the present invention provides a drilling and reaming device for soft and broken coal seams, which uses pipes to realize the purpose of anti-collapse gas extraction, and uses a brand-new slag discharge system at the same time, thus effectively solving the problem. The problem of hole formation improves the efficiency of drilling anti-collapse and slag removal

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