Study and determination of rational operating ratio for percussion drilling machines

In this paper, we have the percussive rotational drilling regime that is determined by combination of speed tool, axial force applied on rock optimal values these parameters d epend in particular type tool and physico mechanical properties rocks to be felled. The aim research improve operating regimes rilling machines under conditions Algerian limestone quarries (Hadjar soud quarry) obtain a better compromise between technical economic indices, order ensure minimum cost price for meter drilled hole. experimenta l results carried methodology, which consists assuming concrete can find setting best techno as well carpenter dr illed holes.