A special drill bit for bottom anchor drilling rig

Abstract

A special drill bit for bottom anchor drilling rigs, including a cylindrical drill body with a straight main cutting edge at the top, clear water spray holes and chip removal grooves with auxiliary cutting edges at the ends symmetrically on the slopes on both sides of the straight main cutting edge, and the middle part of the drill body There is a sewage channel communicating with the chip removal groove, the periphery of the sewage channel is provided with a clear water channel communicating with the clear water spray hole, and the bottom inner hole wall of the drill bit body is provided with a threaded hole matched with the bottom anchor drilling machine. The invention can not only carry out effective drilling on the coal mine floor, but also realize drilling, cleaning, and sewage discharge at the same time, which solves the problem that the traditional drilling method is easy to cause hole blocking in the floor construction, and saves the need to withdraw the drill during the drilling process. It has simple structure, strong adaptability, easy operation and good anti-blocking effect.

Description

technical field [0001] The invention relates to a drill bit, in particular to a special drill bit for a bottom anchor drilling rig which is suitable for quick and clean construction of anti-blockage drilling in underground coal mines. Background technique [0002] With the rapid development of my country's economic construction, the demand for energy is huge. Coal resources, as the main source of energy supply in my country, will be difficult to change for a long time in the future, resulting in the continuous development of the coal industry in the direction of mechanization and automation. In most coal mines in my country, due to the nature of coal rock, burial depth, ground stress and other reasons, the floor of the roadway is severely damaged, which affects the safety of the roadway and restricts the safe production of the mine. Therefore, the task of floor reinforcement and treatment is arduous. [0003] At this stage, the most important method for the reinforcement and...

AI Technical Summary

Problems solved by technology

This kind of wet drilling method has some technical problems when working on the coal mine floor: first, the extruded mud-water mixture splashes around with the drill pipe and cannot be collected, which affects the normal transportation of the roadway and the walking of workers. At the same time, the surrounding rock of the floor is soaked and softened. The bottom drum problem is exacerbated; secondly, the traditional drilling method is easy to cause hole plugging in the floor construction, and the drilling back and hole cleaning work is extremely cumbersome during the drilling process, which seriously affects the construction efficiency of the floor anchorage; thirdly, the coal in the drilling hole (Rock) powder enters the roadway, exacerbating the difficulty of roadway dust control and endangering the health of workers

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