Volume 3, Issue 2, April 2014, Pages: 34-41
Received: Feb. 18, 2014;
Accepted: Apr. 8, 2014;
Published: Apr. 10, 2014
Views 3606 Downloads 429
Saliu Muyideen Alade, Department of Mining Engineering, the Federal University Technology, Akure Ondo State, Nigeria
Shehu Shaib Abdulazeez, Department of Mineral Resources Engineering, Kogi State Polytechnic, Lokoja, Nigeria
The research work assessed the stability of rock slopes for optimum exploitation of limestone deposits at Obajana in Kogi State and Ewekoro in Ogun state. Geological mapping was carried out to measure the orientations of discontinuities. The orientation data obtained were plotted on stereonets to determine pole concentration and major joint sets using Dips 5.0 software from Rocscience. Two joint sets were identified in Obajana with orientations of 720/0890 and 880/2210 while three joint sets with orientations of 610/0480, 160/2800 and 900/1400 were identified in Ewekoro quarry face. The Dips software was further used to perform kinematic analyses for toppling, planar and wedge failures for each of the faces investigated. The friction angles for the kinematic analyses were obtained using Roclab 1.0 software (Rocscience, 2002). The results of the analyses show that toppling failure cannot occur in Obajana while planar and wedge failures may occur. The three failure modes (toppling, planar and wedge) were identified in Ewekoro.
Saliu Muyideen Alade,
Shehu Shaib Abdulazeez,
Kinematic Assessment of Rock Slope Stability at Obajana and Ewekoro Quarries, Earth Sciences.
Vol. 3, No. 2,
2014, pp. 34-41.
Akande, J.M. and Idris, M.A. (2007). Mechanism of rock slope failure in selected quarries in Oyo sate, Nigeria: Advanced Materials Research, Trans Tech Publications, Switzerland, Vol. 18-19, pp. 13 – 19
American Society for Testing Materials (ASTM), (1994). Annual Book of ASTM Standards-construction: Soil and Rocks. ASTM Publication, Vol. 04.08.978, p. 975
Aydin, A. and Basu, A. (2005). The Schmidt hammer in rock material characterization: Journal of Engineering Geology, 81 (2005), Elsivier International, pp. 1-14.
Eberhardt, E. (2003). Rock slope stability analysis - utilization of advanced numerical techniques, Vancouver, Canada: Earth and Ocean Sciences, University of British Columbia. Retrieved on 23rd August, 2010 from www.eos.ubc.ca/personal/erik/e-paper, p. 41
Goodman, R.E. (1980). Introduction to Rock mechanics: John Wiley and Sons, New York, p. 478
Goodman, R.E. and Bray, J.E. (1976). Toppling of rock slopes: Proceedings of speciality conference on rock engineering for foundations and slopes, Colorado, Vol. 02, pp. 201 – 243.
Goodman, R.E., (1989). Introduction to Rock Mechanics (2nd edition): Wiley, New York, p. 562
Gurocak, Z., Alemdag, S. and Zaman, M.M. (2008). Rock slope stability and excavatability assessment of rocks at the Kapikaya dam site, Turkey: Journal of Engineering Geology, vol. 96(1–2): pp. 17–27.
Hoek, E. and Bray, J.W. (1981). Rock Slope Engineering (3rd edition): The Institution of Mining and Metallurgy, London, p.358
International Society for Rock Mechanics, ISRM. (1981). Rock characterization, testing and monitoring. In: Brown, E.T. (edition) ISRM suggested methods. Pergamon Press, Oxford, UK, p. 211.
Kliche, C. A. (1999). Rock Slope Stability: Society for Mining, Metallurgy, and Exploration, Colorado, USA, p. 253
Pettifer, G.S. and Fookes, P.G. (1994). A revision of the graphical method for assessing the excavatability of rock: Quarterly Journal of Engineering Geology 27, pp. 145–164.
Rocscience Ltd. (1999). DPS 5.0 software for graphical and statistical analysis of orientation based geological data. Toronto, Ontario, Retrieved on 23th July, 2011 from www.rocscience.com.
Rocscience Ltd. (2002). ROCLAB software for calculating Hoek – Brown Rock mass Strength. Toronto, Ontario, Retrieved on 16th July, 2011 from www.rocscience.com
Wyllie, D.C. and Mah, C.W. (2005). Rock Slope Engineering: civil and mining (4th Edition): Spon Press, Taylor and Francis Group, London and New York, p. 431
Xu, S., Grasso, P. and Mahtab, A. (1990). Use of Schmidt Hammer for estimating mechanical properties of weak rock: Proc. 6th International IAEG Congress, vol. 1. Balkema, Rotterdam, pp. 511 –519.