7Lundberg B.Computer modeling and simulation of percussive drilling of rock[J].Comprehensive Rock Engineering, 1993 (4) : 137-154;.
8Izquierdo L, Chiang L.A methodology for estimation of the specific rock energy index using corrected down-the-hole drill monitoring data[J].Mining Technology-lMM Transactions Section A, 2004 (12) : 225-236.
9Wasfy T M, Noor A K.Computational procedure for simulating the contact/impact response in flexible multibody systems[J]. Computer Methods in Applied Mechanics and Engineering, 1997 (147) : 153-166;.