DISPLACEMENT DISTRIBUTION MODEL OF ANDESITE ROCK MASS DUE TO BLASTING ACTIVITY USING FINITE ELEMENT METHOD
DOI:
https://doi.org/10.30556/imj.Vol18.No2.2015.289Keywords:
ground vibration, blasting process, slope stability, finite element methodAbstract
In mining operation, blasting is the most common method to disperse rocks. Blasting process does not only minimize rock fraction, but also produce less favourable energy for its surroundings. One of less favourable energies is ground vibration. The ground vibration will affect slope stability, because it will increase the driving force of the slope to collapse. Thereby, a research is needed to understand the influence of ground vibration in the slope stability. From the level of ground vibration influence on slope stability, it can be set the limit of the blasting process to keep the slope stable. Numerical method that used in this research is finite element method. One of its advantages is to accomodate time element in its calculations. Analysis results of this method are the displacements distribution model of the rock mass in static and dynamic conditions. On the track of A-A’, rock mass displacement took place at the crest of 6.6 mm (static condition) to 8.5 mm (dynamic condition). Likewise, the track of B-B’ line of 0.4 mm to 2.5 mm and line C-C’ from 0.6 mm to 2.0 mm. The safety factor value on the floor of the lines B-B ‘and C-C’ in the dynamic conditions is 1.3. This value is quite prone, so it needs a treatment at the mine slope in order not endanger workers’ safety, mining equipment and the surrounding buildings.
References
Azizabadi, H.R.M., Mansouri, H. and Fouche, O., 2014. Computers and Geotechnics, vol. 61, p. 42-49.
Basuki, S., 2011. Analisis kestabilan lereng section 10 akibat pengaruh getaran peledakan dan air tanah PT. Pama Persada.
Bemmelen, R.W.Van.,1949. The Geology Indonesia, The Hague Martinus.
Bouzakis, K.-D., Skordasis, G., Klocke, F. and Bouza- kis, E., 2009. A FEM-based analitycal-experimental method for determining strength properties gra- dation in coatings after micro-blasting. Surface and Coatings Technology, vol. 203, issue 19, p. 2946-2953.
Choi, B.H., Ryu, C.H., Deb, D., Jung, Y.B. and Jeong, J.H., 2013. Case study of establishing of a safe blasting criterion for the pit slopes of an open-pit coal mine. International Journal of Rock Mechanics and Mining Sciences, vol. 57, p. 1-10.
Fakhimi, A. and Lanari, M., 2014. DEM-SPH simulation of rock blasting. Computers and Geotechnics, vol. 55, p. 158-164.
Faramarzi, F., Mansouri, H. and Farsangi, M.A.E., 2013. A rock engineering systems based model to predict rock fragmentation by blasting. International Journal of Rock Mechanics and Mining Sciences, vol. 60, p. 82-94.
Faramarzi, F., Farsangi, M.A.E. and Mansouri, H., 2014. Simultaneous investigation of blast induced ground vibrationand airblast effects on safety level of struc- tures and human in surface blasting. International Journal of Mining Science and Technology, vol. 24, issue 5, p. 663-669.
Ghasemi, E., Sari, M. and Ataei, M., 2012. Develop- ment of an empirical model for predicting the ef- fects of controllable blasting parameters on flyrock distance in surface mines. International Journal of Rock Mechanics and Mining Sciences, vol. 52, p. 163-170.
Griffiths D.V, Lane P.A, 1999. Slope Stability Analysis by Finite Elements, Geotechnique, Vol 49 No.3.
Hoek, E., dan Bray, J.W., 1991. Rock slope engineer- ing. IMM, London.
Jiang, N. and Zhou, C., 2012. Blasting vibration safety criterion for a tunnel liner structure. Tunneling and Underground Space Technology, vol. 32, p. 52-57.
Lu, W., Yang, J., Chen, M. and Zhou, C., 2011. An equivalent method for blasting vibration simulation. Simulation and Modelling Practice and Theory, vol. 19, issue 9, p. 2050-2062.
Lucca, Frank J., 2003. Tight construction blasting: Ground vibrations basics, monitoring, and predic- tion. Terra Dinamica LLC.
Nateghi, R., 2011. Prediction of ground vibration level induced by blasting at different rock units. Inter- national Journal of Rock Mechanics and Mining Sciences, vol. 48, p. 899-908.
Shi, X.Z. and Chen, S.H.R., 2011. Delay time opti- mization in blasting operations for mitigating the vibration-effects on fi pit walls’ stability. Soil Dynamics and Earthquake Engineering, vol. 31, issue 8, p. 1154-1158.
Silitonga, P.H., 2003. Geologi Lembar Bandung. Pus- litbang Geologi.
Singh, P.K., Roy, M.P. and Paswan, R.K., 2014. Con- trolled blasting for long term stability of pit-walls. International Journal of Rock Mechanics and Min- ing Sciences, vol. 70, p. 388-399.
Standar Nasional Indonesia, 2010. Baku tingkat getaran peledakan pada kegiatan tambang ter- buka terhadap bangunan, Badan Standardisasi Nasional, Jakarta.
Standar United States Bureau of Mines (USBM), 1930. Structure response and damage produced by ground vibration from surface mine blasting, United States (USA).
Terzaghi, Peck, & Mesri, 1996. Soil Mechanics in Engineering Practise, John Wiley and Sons, Inc., New York.
Tripathy, G.R. and Shirke, R.R., 2015. Underwater drilling and blasting for hard rock dredging in Indian ports-a case study. Aquatic Procedia, vol. 4, p. 248-255.
Wang, Z.W., Li, X.B., Peng, K. and Xie, J.F., 2015. Impact of blasting parameters on vibration signal spectrum: determination and statistical evidence. Tunneling and Underground Space Technology, vol. 48, p. 94-100.
Wyllie, D.C., and Christopher W. Mah, 2004. Rock slope engineering : Civil and mining, 4th edition, Spon Press is an imprint of the Taylor & Francis Group, New York.
Yan, P., Zhao, Z., Lu, W., Fan, Y., Chen, X. and Shan, Z., 2015. Mitigation of rock burst events by blasting techniques during deep-tunnel excavation. Engi- neering Geology, vol. 188, p. 126-136.
Yilmas, O. and Unlu, T., 2013. Three dimensional nu- merical rock damage analysis under blasting load. Tunneling and Underground Space Technology, vol. 38, p. 266-278.
Yu, H., Yuan, Y., Yu, G. and Liu, X., 2014. Evaluation of influence of vibrations generated by blasting constructions on an existing tunnel in soft soils. Tunneling and Underground Space Technology, vol. 43, p. 59-66.
Yuanjuan, Z., 2014. Study on attenuation law of open-pit bench. Procedia Engineering, vol. 84, p. 868-872.
Zhu, W.C., Wei, C.H., Li, S., Wei, J.Zhang, M.S., 2013.
Numerical modeling on distress blasting in coal seam for enhancing gas drainage. International Journal of Rock Mechanics and Mining Sciences, vol. 59, p. 179-190.
Downloads
Issue
Section
License
Indonesian Mining Journal provides immediate open access to its content on the principle that making research freely available to the public to supports a greater global exchange of knowledge.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
