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Blasting Technique for Stabilizing Accident-Prone Slope for Sustainable Railway Route


Affiliations
1 CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad 826 015, India
2 Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, India
 

Konkan Railway has many unstable slopes along the 741 km long route from Roha to Thokur in the states of Maharashtra, Goa and Karnataka in India. Frequent cases of boulder fall, slope failure and landslide used to occur on the track during the rainy season. Such cases have resulted in several severe train accidents, traffic interruptions, loss of lives and assets. Hence the Konkan Railway Corporation deployed several geotechnical measures such as wire-netting, retaining wall, rock bolting and shotcreting for stability enhancement. However, none of these measures proved effective and accidents continued. Finally, the Konkan Railway Corporation decided to redesign the cut-slopes using blasting. Excavation of hard rock for its removal without damaging the existing track (2– 3 m away from the slope) and disrupting the traffic, was a daunting task. An unplanned blast would have resulted in the closure of the route for hours. The present study explains the method in which entire cutting was redesigned by formation of 5 to 2 m wide berms at an interval of 6 m bench height from rail track level using novel direction controlled blasting technique. Further, stability of the cut-slope, before and after exacavation, has been determined using kinematic analysis and 3D numerical modelling. Similar technique can be adopted to widen or stabilize an active transportation route in hills.

Keywords

Blasting, Kinematic Analysis, Numerical Modelling, Railway Track, Slope Rockmass Removal, Stabilization.
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  • Peckover, F. L. and Kerr, W. G., Treatment and maintenance of rock slops on transportation routes. Can. Geotech. J., 1977, 14, 487–507.

  • Umrao, R. K., Singh, R., Ahmad, M. and Singh, T. N., Stability analysis of cut slopes using continuous slope mass rating and kinematic analysis in Rudraprayag district, Uttarakhand. Geomaterials, 2011, 1, 79–87; doi:10.4236/gm.2011.13012.

  • Kainthola, A., Singh, P. K. and Singh, T. N., Stability investigation of road cut slope in basaltic rock mass. Geosci. Frontiers, 2015, 6, 837–845; doi:10.1016/j.gsf.2014.03.002.

  • Singh, P. K., Kainthola, A., Panthee, S. and Singh, T. N., Rockfall analysis along transportation corridors in high hill slopes. Environ. Earth Sci., 2016, 75, 441; doi:10.1007/s12665-016-5489-5.

  • Ersoz, T. and Topal, T., Assessment of rock slope stability with the effects of weathering and excavation by comparing deterministic methods and slope stability probability classification (SSPC). Environ. Earth Sci., 2018, 77, 547; doi:10.1007s12665-018-7728-4.

  • McCauley, M. L., Works, B. W. and Naramore, S. A., Rockfall mitigation. Report FHWA/CA/TL85/12, FHWA, US Department of Transportation, 1985, pp. 1–147.

  • Casale, M., Oggeri, C. and Peila, D., Improvements of safety conditions of unstable rock slopes through the use of explosives. Nat. Haz. Earth Syst. Sci., 2008, 8, 473–481.

  • Wyllie, D. C., Rock Fall Engineering, CRC Press, 2014, 1st edn; doi:10.1201/b17470.

  • Duncan, C. W. and Norman I. N., Stabilization of rock slopes. Landslide investigations and mitigation. Special Report 247, Transportation Research Board, National Research Council, Washington, 1996, pp. 474–506.

  • Fookes, P. G. and Sweeney, M., Stabilization and control of local rock falls and degrading rock slopes. Quart. J. Eng. Geol. Hydrol., 1976, 9, 37–55; doi:10.1144GSL.QJEG.1976.009.01.03.

  • Kumar, K., Prasad, P. S., Mathur, S. and Kimothi, S., Rockfall and subsidence on Mumbai–Pune Expressway. Int. J. Geo-Eng. Case Hist., 2010, 2(I), 24–39; doi:10.4417/IJGCH-02-01-02.

  • Wyllie, D. C. and Mah, C. W., Rock Slope Engineering: Civil and Mining, Spon Press, New York, 2004, 4th edn, p. 456.

  • Research Design & Standards Organisation (RDSO), Guidelines for cuttings in railway formations. GE: G-2, Geotechnical Engineering Directorate, Research Designs and Standards Organisation, Government of India, Ministry of Railways, 2005, p. 183.

  • Shinghal, B. B. S., Hydrogeologicalcharacteristics of Deccan trap formations of India, hard rock hydrosystems. In Proceedings of Rabat Symposium S2, May 1997, IAHS Publ No. 241, 1997, pp. 75–79.

  • Indian Standard: IS:11315 (Part 10), Method for the quantitative descriptions of discontinuities in rock masses, 1987, pp. 1–12.

  • Palmstrom, A., The volumetric joint count – A useful and simple measure of the degree of rock mass jointing. In Proceedings of 4th IAEG, New Delhi, 1982, pp. 221–228.

  • Indian Standard: IS:11315 (Part 5), Method for the quantitative descriptions of discontinuities in rock masses. 1987, pp. 1–16.

  • Hoek, E, Carranza-Torres, C. and Corkum, B., Hoek-Brown Failure Criterion – 2002 edn. In Proceedings of NARMS-TAC, Mining Innovation and Technology, Toronto, University of Toronto, 2002, pp. 267–273.

  • Adams, B. M., Slope stability acceptance criteria for opencast mine design. In 12th ANZ Conference on Geomechanics and Human Influence, Wellington, New Zealand, 2015, pp. 916–923.

  • Canadian Geotechnical Society, Canadian Foundation Engineering Manual, BiTech Publishers Ltd, Vancouver, Canada, 1992.

  • Hoek, E., Practical Rock Engineering, Rocscience, Toronto, 2007, p. 341.

  • Ambrasys, N. R. and Hendron, A. J., Dynamic behavior of rock masses. In Rock Mechanics in Engineering Practice(eds Stagg, K. G. and Zeinkiewicz, O. C.), Wiley, London, 1968, pp. 203–207.

  • Lucca, F. J., Tight construction blasting: ground vibration basics, monitoring and prediction. Terra Dinamica LLC, 2003, 1–21.

  • Holmberg, R. and Persson, P. A., Swedish approach to contour blasting. In Proceedings of 4th Conference on Explosive and Blasting Techniques (ed. Konya, C. J.), Society of Explosives Engineers, New Orleans, Louisiana, 1978, pp. 113–127.

  • Jimeno, C. L., Jimeno, E. L. and Carcedo, F. J. A., Drilling and Blasting of Rocks, A. A. Balkema, Rotterdam, The Netherlands 1995, p. 391.

  • Tsoutrelis, C., Kapenis, A. and Theophili, C., Determination of blast induced damage zones in pillars by seismic imaging. In Proceedings of EXPLO Conference, 1995, pp. 387–393.

  • Barton, N. R., Lien, R. and Lunde, J., Engineering classification of rock masses for the design of tunnel support. Rock Mech., 1974, 6(4), 189–239.

  • Arora, S. and Dey, K., Estimation of near-field peak particle velocity: A mathematical model. J. Geol. Mining Res., 2010, 2(4), 66–73.

  • Rustan, L. N., Controlled blasting in hard intense jointed rock in tunnels. CIM Bull., 1985, 8(884), 63–68.

  • Langefors, U. and Khilstrom, B.,The Modern Technique of Rock Blasting, John Wiley, New York, 1973, p. 473.

  • Hustrulid, W. and Johnson, J., A gas pressure-based drift round design methodology. In Proceedings of the 5th International Conference on Mass Mining (eds Schunnesson, H. and Nordlund, E.), Lulea University of Technology Press, Lulea, Sweden, 2008, pp. 657–669.

  • Konya, C. J. and Walter, E. J., Rock blasting. In Seminar of Blasting and Overbreak Control, Precision Blasting Services, Montville, OH, 1985.


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  • Blasting Technique for Stabilizing Accident-Prone Slope for Sustainable Railway Route

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Authors

N. K. Bhagat
CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad 826 015, India
A. K. Mishra
Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, India
M. M. Singh
CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad 826 015, India
Aditya Rana
CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad 826 015, India
S. Tewari
CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad 826 015, India
P. K. Singh
CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad 826 015, India

Abstract


Konkan Railway has many unstable slopes along the 741 km long route from Roha to Thokur in the states of Maharashtra, Goa and Karnataka in India. Frequent cases of boulder fall, slope failure and landslide used to occur on the track during the rainy season. Such cases have resulted in several severe train accidents, traffic interruptions, loss of lives and assets. Hence the Konkan Railway Corporation deployed several geotechnical measures such as wire-netting, retaining wall, rock bolting and shotcreting for stability enhancement. However, none of these measures proved effective and accidents continued. Finally, the Konkan Railway Corporation decided to redesign the cut-slopes using blasting. Excavation of hard rock for its removal without damaging the existing track (2– 3 m away from the slope) and disrupting the traffic, was a daunting task. An unplanned blast would have resulted in the closure of the route for hours. The present study explains the method in which entire cutting was redesigned by formation of 5 to 2 m wide berms at an interval of 6 m bench height from rail track level using novel direction controlled blasting technique. Further, stability of the cut-slope, before and after exacavation, has been determined using kinematic analysis and 3D numerical modelling. Similar technique can be adopted to widen or stabilize an active transportation route in hills.

Keywords


Blasting, Kinematic Analysis, Numerical Modelling, Railway Track, Slope Rockmass Removal, Stabilization.

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DOI: https://doi.org/10.18520/cs%2Fv118%2Fi6%2F901-909