FIELD: soil or rock drilling; mining.
SUBSTANCE: invention relates to the field of the roadway floor anchoring arrangement equipment, in particular to the coal mine roadway floor anchoring drill rod. Device has simple design and is well adaptable, simple to operate, provides satisfactory counteracting force. Drill rod comprises hollow drill rod, wherein in the hollow drill rod the hollow sleeve is installed, connection device with thread at the front end is located at the hollow drill rod front end, connection device with thread at the rear end is mounted on the hollow drill rod rear end, spirally wound onto the hollow sleeve connection wire, at that, the connection wire helical direction is opposite to the drill rod working direction, and formed between the connecting wire and the hollow drill rod inner channel spiral gap. At the hollow sleeve rear end, the waterproof recess is made. Drill rod is made so, that, during operation after the drill rod connection to the drilling rig and the drill bit, the hollow sleeve is inserted into the waterproof recess, and tightening the drill rod with a wrench, engaging the wrench to the wrench groove, at that, the drill rod head and tail parts connection is realized, and the drill rod is extending. Drilling rig drives the drill rod into rotation through the connection device with thread at the rear end, at that, the drilling begins. Simultaneously, clean water under pressure is pumped into the drill rod through the cavity between the hollow drill rod and hollow sleeve and transferred into the drill bit to flush the drilled hole when the helical connecting wire between the hollow drill rod and the hollow sleeve rotates. Helical connecting wire provides good effect for water under pressure directing and the hollow sleeve fixing. Channel in the hollow sleeve is the waste water drainage channel.
EFFECT: technical result is the drilling, washing and the sludge discharge simultaneous execution.
3 cl, 2 dwg
