METHOD OF TREATMENT OF DRIFTING FACE Russian patent published in 2015 - IPC E21D9/10 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry, namely to a method of treatment of the drifting face with a combined executive tool. The method comprises forming the advance cut on the primary rocks with the cutting bit. Destruction of permafrost coarse clastic rocks with the impact tool is carried out. After each cycle of mining the near-contour part of the face, weakened by the impact pulses is destroyed with the additional influence of the cutting bit to a depth D, which value is determined from the relation: $$D=\sqrt{A\left(B+A\right)}-A,$$ where D is the depth of the weakened zone; A is the thickness of the broken down chips; B is the depth to which the effect of the impact pulse is extended, taken for the calculation equal to 2A.

EFFECT: increase of the stability and efficiency of working and ensuring the safety of the subsequent mining operations under conditions of alluvial mines of the cryolithic zone.

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