The invention discloses a passive
extrusion type pulse
coal chip jet flow coal breaking pressure relief anti-reflection device and a use method thereof. The device mainly comprises an anchor stirrer,a water tank, a
slurry pump, a pressure gauge, a pipeline, a rotary water
tail, a drilling
machine, a
drill rod, an integrated
drill bit, a dust collection cover, a dust collection pipeline, a
coal chip box, a filter screen and a jet pump. According to the device, coal chips generated during drilling is used as an
abrasive material, the
slurry pump is used for pressurizing to form a passive
extrusion type pulse high-pressure coal
chip jet flow, the passive
extrusion type pulse high-pressure coal chip
jet flow passes through a
nozzle of the integrated
drill bit to be accelerated again, coal iseroded and broken, coal seam pressure relief and anti-reflection is carried put, the coal chips are used as the
abrasive material to be taken conveniently and locally, underground environmental
pollution can be reduced, and economic cost is saved; and in addition, the
slurry pump is adopted to generate the pulse jet flow with adjustable
pulse frequency, so that the problem that a
current pulse jetflow is difficult to apply in the field is solved, the water
cushion effect can be effectively avoided, and the coal breaking efficiency is improved.