[1] Yasar, E., Ranjith P.G. and Viete D.R.; 2011, “An experimental investigation into the drilling andphysico-mechanical properties of a rock-like brittle material”, Journal of Petroleum Science and Engineering 76,p 185–193.
[2] Fish, B.G., 1968; “The basic variables in rotary drilling”, Mine Quarry Eng; 27:74–81.
[3] Schmidt, R.L., 1972; “Drillability Studies –Percussive Drilling in the Field”, US Bureau of Mines RI 7684.
[4] Oddsson, J., 1979; “Rock quality designation and drilling rate correlated with lithology and degree of alteration in volcanic rocks from the 1979 Surtsey drill hole”, Surtsey Research Progress Report IX, 94-97.
[5] Wilbur, L; 1982; Rock Tunnel Engineering Handbook, Edited by Bickel and kuesel, Publication of Van Norstrand Reinhold Company.
[6] Howarth, D. F., Adamson, W. R. and Berndt, J. R., 1986; “Correlation of model tunnel boring and drilling machine performances with rock propertie”. Int. J. Rock Mech. Min. Sci, 23p 171–175.
[7] Kahraman, S., 1999; “Rotary and percussive drilling prediction using regression analysis”, International Journal of Rock Mechanics and Mining Science, 36:p981-989.
[8] Altindag, R., 2000; “The role of brittleness on the analysis of percussive drilling Performance”, In: Proc. of 5th Turkish National Rock Mech. Symp., p. 105–112.
[9] Altindag, R., 2002; “The evaluation of rock brittleness concept on rotary blast hole drills”, The Journal of The South African Institute of Mining and Metallurgy.
[10] Altindag, R., 2003; “Technical Note Estimation of Penetration Rate in Percussive Drilling by Means of Coarseness Indexand Mean Particle Size”, Rock Mech. Rock Engng. 36 (4), p 323–332.
[11] Akun, M.E., Karpuz, C., 2005; “Drillability studies of surface-set diamond drilling in Zonguldak region sandstones from Turkey”, International Journal of Rock Mechanics and Mining Science, 42, p 473-479.
[12] Yarali, O., Kahraman S., 2011; “The drillability assessment of rocks using the different brittleness values”, Tunnelling and Underground SpaceTechnology 26, p406–414.
[13] Cheniany, A, Khoshrou, H, Shahriar, K and Khademi Hamidi, J., 2012; “An estimation of the penetration rate of rotary drills using the Specific Rock Mass Drillability index”, International Journal of Mining Science and Technology22 p 187–193.
[14] Tzamos, S, Sofianos, A. I., 2007; “A correlation of four rock mass classification systems through their fabric indice"s”, Int J Rock Mech Min Sci;4: p 477-495.
[15] Ghafouri, M, Lashkaripour, Gh, Moradi, Taher, Rostami Yarani, H., 2007, “Evaluate rock mass fabric index according to the system of rock mass classification”, Fifth Conference of geology and environmental of Iran, 905-913, in Persian.
[16] Hasheminasab, F, Monjezi, M, Khademi Hamidi, J., 2013, Estimated of drillability of rock using fabric index in lead and zinc mine in Zanjan, in Persian.
[17] NRC (National Research Council), 2000, “Risk analysis and Uncertainty in Flood Reduction Studies”, National Academic Press.
[18] Ben H. Thacker, David S. Riha,Y.-T. (Justin) Wu, 1996, “probabilistic structural analysis of deep tunnels”, Technical Report, Southwest Research institute
[19] Ranjbar, Zahra., 2010, Determine the appropriate support system for access tunnels in goshfil mine using Multiple Criteria Decision Making, Master's thesis, Department of Petroleum Engineering and Geophysics, industrial University of Shahrud, in Persian.
[21] Hasheminasab, Fakhrosadat., 2013, Development of bit penetration rate model in drilling operation of surface excavation, Master's thesis, Technical Faculty of Tarbiat Modares University, In Persian
[22] D. r. Griffiths. Gordon A Fenton; “Probabilistic Method In Geotechnical Engineering”, spring wien New Yourk.
[23] Minhaj, Mohammad bagher, 2002, Computational Intelligence, first volume, Foundations of Neural Networks, Second Edition, published by Amirkabir University of Technology, Tehran, In Persian.