The method and the device make it possible to modify the mechanism of rock destruction through secondary tangential (generated in the drilling tool) and shearing (generated in the rock) stresses. This promotes the formation of additional spalling surfaces at the bottomhole, which facilitates rock destruction by drilling thus increasing its efficiency.

 The Institute of Mining has developed the method for drilling medium-hard and hard rocks, which includes a top-head drive drilling rig, an automatic rotation of the bit during lifting and its percussion action through rockbreaking drilling tool causing spallation. Unlike the existing models, the proposed method performs spalling in the normal and shearing directions following a new destruction mechanism, which allows two to three-fold decrease in the power consumption as compared to the commonly used roller-bit drilling, and reduces the weight of drilling rigs by a factor of 1.5—2.5.

 When manufactured and applied on an industrial scale, the method makes it possible to reduce drilling tool production and operational costs, to cut down hole-making costs per meter of advance, and, accordingly, to increase by 1.5--2 times the drilling tool capacity.