Injection type mine drill bit type reamer

Abstract

The invention discloses an injection type mine drill bit type reamer. The injection type mine drill bit type reamer comprises a drilling and reaming hole rod, a drilling and reaming cutter and a plurality of reaming cutters. The center line of the drilling and reaming hole rod is arranged in the front-rear direction, and a cylinder-shaped high pressure water cavity is coaxially formed at the frontend of the drilling and reaming hole rod and the front end of the high pressure water cavity is open. A water injection hole is formed in the drilling and reaming hole rod in the center hole direction, the front end of the water injection hole communicates with the high pressure water cavity, the rear end of the drilling and reaming cutter is slidably connected into the high pressure water cavity, the reaming cutters are evenly formed along the front end face of the drilling and reaming hole rod in the peripheral direction, and the inner side of the front portion of the reaming cutters are inpressing-pushing fit with the conical surface of the reaming cutters. The injection type mine drill bit type reamer adopts the method of adjusting water pressure to separately perform drilling and reaming operations, has the advantages of simple structure, convenient operation, small size, light weight, flexible and reliable technology, unified power source of drilling reaming and hole reaming, stable hole reaming, easy recovery of cutters and implement of edge drilling while reaming, greatly improves the reliability of bolt anchoring, and ensures the safety of workers in borehole operation.

Description

technical field [0001] The invention belongs to the technical field of roadway support, and in particular relates to a liquid-injection drill bit type hole reamer for mining. Background technique [0002] Bolts used in underground roadway support have the characteristics of simple structure, convenient construction, and strong adaptability. Therefore, in recent years, bolt support has become the main way of roadway support, but in the engineering application of bolt support, the failure form of the bolt is mainly due to the coal adhering to the hole wall during the support process and the anchoring process. The sliding between the anchor rod and the hole wall becomes unstable when the rock is gray or broken and soft. Through experiments and research, reaming the bottom of the anchor hole is one of the means to solve the problem of anchor bolt slipping and instability, so that the anchor bolt can be firmly anchored to the wall of the anchor hole through the injected anchorin...

AI Technical Summary

Problems solved by technology

Therefore, in recent years, bolt support has become the main way of roadway support, but in the engineering application of bolt support, the failure form of the bolt is mainly the support process and the coal adhered to the hole wall during the anchoring process. The sliding between the anchor rod and the hole wall becomes unstable when gray or broken and soft surrounding rock

Through experiments and studies, reaming the bottom of the anchor hole is one of the means to solve the problem of anchor bolt slipping and instability, so that the anchor bolt can be firmly anchored to the wall of the anchor hole through the injected anchoring agent, but there is no such method yet. Special device for reaming the bottom of the hole while drilling the anchor hole

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