A drill bit and method for preventing bit jamming in a tunnel jumbo

Abstract

The present application relates to the field of anti-stuck drill of drilling machine parts, and particularly relates to an anti-stuck drill bit and method for a tunnel rock drilling jumbo, the outer peripheral surface of the drill bit body has a spiral distribution of the chip groove along the axial direction, in the second section close to the tooth part of the front end of the drill bit, there are jet holes arranged on both sides of the chip groove and arranged along the spiral direction of the groove, the drill bit body is internally provided with a central fluid passage, the jet holes are communicated with the central fluid passage; the jet holes have a preset inclination angle in the axial direction relative to the radial plane of the drill body, compared with the prior art, the beneficial effects of the present application are that: the present application improves the structure of the drill bit, and the design parameters of the chip groove and the jet hole in the drill bit are constrained by the fluid-structure coupling model, the radial jet vector and the spiral chip groove are efficiently cooperated, the chip removal efficiency is improved, the probability of rock debris blockage is fundamentally reduced, the abnormal friction and thermal damage caused by drill bit seizure are reduced, and the service life of the drilling tool is overall improved.

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