Evaluation of Relationships between Drilling Rate Index and Physical and Strength Properties of Selected Rock Units of Pakistan
Abstract
Fifteen selected rock types collected from different formations of Pakistan were subjected to Drilling Rate Index (DRI) tests and various physical and strength properties tests including, porosity (n), density, primary wave velocity (Vp), uniaxial compressive strength (σc), Brazilian tensile strength (σt) and Schmidt hammer rebound number (Rn),. Prior knowledge of the drill ability of rocks and their physico-mechanical properties plays a decisive role in planning and design of rock drilling and excavation processes. DRI tests developed by NTNU/SINTEF are in use by the industry since 1960s and have proved very successful in estimation of the boreability of rocks, but no such work has been reported for Pakistani rocks to date. Reasonable correlations were found between the DRI and the properties of the tested rocks. The trends shown in this paper are of interest for the machine manufacturers and operators working on various projects involving the use of drilling machines and other mechanical excavators.References
A.S. Tanaino, ―Rock classification by drillability. Part I: Analysis
of the available classifications‖, J. Min. Sci, vol. 41, pp. 541–549,
C. Karpuz, A.G. Pasamehmetoglu, T. Dincer, Y. Muftuoglu,
―Drillability studies on the rotary blasthole drilling of lignite
overburden series‖, Int. J. Surface Min. Reclam. Environ, vol. 4,
pp. 89–93, 1990
J. Paone, D. Madson, ―Drillability Studies--Impregnated Diamond
Bits‖, US Department of the interior, Bureau of Mines, RI 6776,
J. Paone, D. Madson, W.E. Bruce, ―Drillability Studies-Laboratory
Percussive Drilling‖, US Department of the interior, Bureau of
Mines, RI 7300, 1969.
M.E. Akun, C. Karpuz, ―Drillability studies of surface-set diamond
drilling in Zonguldak Region sandstones from Turkey‖, Int. J.
Rock Mech. Min. Sci, vol. 42, pp. 473 -479, 2005.
N. Bilgin, S. Kahraman, ―Drillability prediction in rotary blast hole
drilling‖, Proceedings of the 18th International Mining Congress
and Exhibition, Antalya, Turkey, pp. 177–182, 2003.
N.A. Akcin, Y.V. Muftuoglu, N. Bas, ―Prediction of drilling
performance for electro-hydraulic percussive drills‖, in Proc. of the
Third International Symposium on Mine Planning and Equipment
Selection, Balkema, Istanbul, Turkey, pp. 483–488, 1994.
R.J. Fowell, I. McFeat-Smith, ―Factors influencing the cutting
performance of a selective tunnelling machine‖, Tunnelling ‗76,
Institute of Mining and Metallurgy, London, pp. 3–11, 1976.
R.W. Poole, I.W. Farmer, ―Geotechnical factors affecting
tunnelling machine performance in coal measures rocks‖, Tunnels.
Tunnelling, vol.10, pp. 27–30, 1978.
S. Kahraman, N. Bilgin, C. Feridunoglu, ―Dominant rock
properties affecting the penetration rate of percussive drills‖, Int. J.
Rock Mech. Min. Sci., vol. 40, pp. 711–723, 2003.
S. Kahraman, ―Rotary and percussive drilling prediction using
regression analysis‖, Int. J. Rock Mech. & Min. Sci., vol. 36, pp.
–989, 1999.
S.L. Huang, Z.W. Wang, ―The mechanics of diamond core drilling
of rocks‖, Int. J. Rock Mech. Min. Sci., vol. 34, pp. 6–12, 1997.
V.P. Aleman, ―A strata strength index for boom type roadheaders‖,
Tunnel Tunn, vol. 13, pp. 52–55, 1981.
H. Rabia, N. Brook, ―The Shore hardness of rock. Technical
Note‖, Int. J. Rock Mech. Min. Sci., vol. 16, pp. 335–336, 1978.
R. Altindag, A. Guney, ―Predicting the relationships between
brittleness and mechanical properties (σc, TS and SH) of rocks‖,
Scientific Research and Essays, vol. 5, pp. 2107 – 2118, 2010.
T.H. Holmgeirsdottir, ―Thomas PR. Use of the D-762 shore
hardness scleroscope for testing small rock volumes‖, Technical
Note, Int. J. Rock. Mech. Min. Sci., vol. 35(1), pp. 85–92, 1998.
A. Lislerud, ―Hard rock tunnel boring: prognosis and costs‖,
Tunnell. Undergr. Space Technol, vol. 3(1), pp. 9–17, 1988.
J.F. Chen, U.W. Vogler, ―Rock cuttability/boreability assessment
research at CSIR‖, in Proceedings of the Tuncon‘92, Design and
Construction of Tunnels, Maseru, South African National Council
on Tunnelling, Yeoville, pp. 91–98, 1992.
K. Thuro, G. Spaun, ―Introducing the destruction work as a new
rock property of toughness referring to drillability in conventional
drill and blast tunneling‖, Eurock‘96 Prediction and Performance
in Rock Mechanics and Rock Engineering, Torino, vol. 2, pp. 707–
, 1996.
NTNU (1998a) Report 13A-98, ―Drillability test methods‖,
Department of Civil and Transport Engineering, Trondheim, 1998.
NTNU/SINTEF drillability analysis presentation of Civil and
environmental engineering Dept., Available: http:// www.
drillability.com. [Accessed Feb. 21, 2014].
O.T. Blindheim, A. Bruland, ―Boreability testing, in Norwegian
TBM Tunnelling‖, Norwegian Tunnelling Society, vol. 11, 1998.
F. Dahl, A. Bruland, P. Drevland, Jakobsen, B. Nilsen, E. Grøv,
―Classifications of properties influencing the drillability of rocks,
based on the NTNU/SINTEF test method‖, Tunnelling and
Underground Space Technology, vol. 28, pp. 150–158, 2012.
C.L. Jimeno, E.L. Jimeno, F.J.A. Carcedo, ―Drilling and blasting
of rocks. Rotterdam: Balkema‖, 1995.
D.F. Howarth, W.R. Adamson, J.R. Berndt, ―Correlation of model
tunnel boring and drilling machine performances with rock
properties‖, Int. J. Rock Mech. Min. Sci., vol. 23, pp. 171–175,
S. Kahraman, C. Balci, S. Yazici, N. Bilgin, ―Prediction of the
penetration rate of rotary blast hole drills using a new drillability
index‖, Int. J. Rock Mech. Min. Sci., vol.37, pp.729-743, 2000.
O. Yarali and E. Soyer, ―Assessment of relationships between
drilling rate index and mechanical properties of rocks‖, Tunnelling
and Underground Space Technology, vol.33, pp.46–53, 2013.
N.V. Matern and A. Hjelmer, ―Försök med pågrus (‗‗Tests with
Chippings‘‘)‖, Medelande nr. 65, Statensväginstitut, Stockholm,
vol. 65, pp. (English summary, 56–60), 1943.
H. Sievers. ―Die Bestimmung des Bohrwiderstandes von
Gesteinen, Gluckauf 86: 37/38, Guckauf G.M.B.H, pp. 776–784,
F. Dahl, ―DRI, BWI, CLI Standards‖, NTNU, Angleggsdrift,
Trondheim, Norway, 2003.
ISRM Suggested Methods, ET. Brown (Editor), ―Rock
characterisation testing and monitoring‖, Oxford: Pergamon Press,
(1981).
O. Yarali and E. Soyer, ―The effect of mechanical rock properties
and brittleness on drillability‖, Scientific Research and Essays, vol.
(5), pp. 1077-108, 2011.
