The invention discloses an in-hole drilling tool integrating drilling, slotting and
punching a
coal seam and a using method thereof. The in-hole drilling tool comprises a water supple device or an air supple device, a high-pressure sealing
drill pipe, a slotting and
punching valve and a
drill bit. The
water supply device and the air supply device are connected with the high-pressure sealing
drill pipe at an orifice. The slotting and
punching valve is installed between the high-pressure sealing
drill pipe and the
drill bit. The in-hole drilling tool is essentially used for drilling and anti-reflective outburst eliminating after drilling of soft outburst
coal seam. The using method is as follows: after the drilling construction is finished, a water supplier with a
pressure release valve is used for starting a high-pressure pumping
station to improve the pressure and the flux for
water supply; high-pressure water current at the pumping
station drives the slotting and punching valve to act for closing an axial liquid passage and opening a radial liquid passage; and high-pressure jet current realizes slotting or punching through a
cutting nozzle or a punching
nozzle. The invention has novel design and easy operation, is safe and reliable, improves the outburst
elimination efficiency and realizes the integrated operation of drilling, slotting or punching and outburst eliminating.