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downhole drill

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Description

Instruction
The essence of DTH drilling, it is in the process of drilling to dive into the hole of the impact device, to reduce the transfer due to the drill rod impact energy loss caused by work, thus reduce holes deep effect on the drilling efficiency.DTH drilling drilling equipment is DTH drill rig, underground mines in China are commonly used with YQ - 80, YQ - 100 and QZ - 165 type, in consistence coefficient f = 8?14 of the ore-bearing rock drill aperture is 80 ~ 165 mm deep hole, can obtain high drilling speed.
Application
DTH drill rig is impact rotary drill, its internal structure is different from general rock drill, its distribution and agency of piston is independent and the impact, as shown in figure 2.Its front bit direct connection, the backend connection pipe.Impactor when drilling into the hole, through distribution device (valve), make the piston hammer (body) inside the impacter reciprocating motion hit the shank, bit of a hit rock bottom of the hole.High-speed rotary percussion tools in hole, is by a separate slewing mechanism, namely by the motor outside the hole or pneumatic rotating device, the backend via the impact in the drill pipe.Generated when the drilling of rock powder by feng shui vent, the mixed gas flushing of mixed gas is by row of powder injection of the impactor by drill pipe center, then through impacter gas tank into the bottom of the hole on cylinder body.
Usage of application
1, ready to chisel cave chamber, the chamber specification according to the method to determine of the borehole, the general level of the digging holes in the cavity 2.6 2.8 meters high, carved on the hole, next to the hole or tilted hole when the cavity width of 2.5 meters, height is 2.8 3 m.
2, the gas conduit road, lighting circuits to near the working face.
3, according to the requirement of the holes for the design, set up strong pillar.Pillar to mat board on both ends of the up and down, in the horizontal axis and the ring according to a cer

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