Optimization of Trench Dimensions to Reduce Blast-Induced Ground Vibration in Gol-Gohar Sirjan Mine Using Numerical Modeling

Document Type : Research Article

Authors

1 Dept. of Mining and Civil Engineering, Faculty of Engineering, University of Gonabad, Iran

2 Dept. of Industrial engineering, Islamic Azad University, Kish,, Iran

3 Head of Mining and Geology Research, Research and Technology Management, Golgohar Sirjan Mine, Iran

Abstract

Ground vibration is one of the detrimental effects associated with blasting that can damage the surrounding environment and nearby structures. In the Gol-Gohar mine in Sirjan, due to the surface expansion, the distance between the structures and the blasting blocks has decreased, leading to vibrations reaching the processing plant complex. These vibrations, by triggering sensors installed on the mills, cause power outages in the circuit, thereby increasing production costs. One solution to mitigate the waves reaching the processing plant complex is to excavate trenches along the wave path. These trenches, by creating conditions like a free surface and reflecting the waves, reduce the transferred wave energy and can prevent unnecessary shutdowns of the concentration circuit due to increased vibration amplitudes. In this study, using the discrete element software UDEC, the results of a field blasting operation were first validated, and based on the validated model, the impact of trench excavation on the propagation of blast waves was analyzed. Ultimately, the optimal dimensions of the trench, which maximizes energy absorption, were determined. According to the numerical analysis results, the excavated trench on each side of the structure should be more than 2m longer and excavated at distances greater than 3m from the structure. Meanwhile, the thickness (width of the trench) had no significant effect on wave attenuation. This trench can reflect approximately 60% of the blast waves.

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Main Subjects

References

[1]       Hartman, H.L., et al., SME mining engineering handbook. Vol. 2. 1992: Society for Mining, Metallurgy, and Exploration Denver.
[2]       Hustrulid, W., Blasting Principles for Open Pit Mining. 1999, Rotterdam, Netherlands: AA Balkema.
[3]       Wyllie, D.C. and C. Mah, Rock slope engineering. 2004: CRC Press.
[4]       Jimeno, C.L., E.L. Jimeno, and F.J.A. Carcedo, Drilling and Blasting of Rocks. 1995, Rotterdam, Netherlands: AA Balkema.
[5]       Konya, C.J. and E.J. Walter, Surface blast design. 1990: Prentice-Hall.
[6]       Woods, R.D., Screening of surface wave in soils. Journal of the soil mechanics and foundations division, 1968. 94(4): p. 951-979.
[7]       Mahdavisefat, E., et al., Vibration screening by trench barriers, a review. Arabian Journal of Geosciences, 2017. 10: p. 1-14.
[8]       Knopoff, L., Scattering of compression waves by spherical obstacles. Geophysics, 1959. 24(1): p. 30-39.
[9]       Knopoff, L., Scattering of shear waves by spherical obstacles. Geophysics, 1959. 24(2): p. 209-219.
[10]    Mal, A.K. and L. Knopoff, Transmission of Rayleigh waves past a step change in elevation. Bulletin of the seismological society of America, 1965. 55(2): p. 319-334.
[11]    White, R.M., Elastic wave scattering at a cylindrical discontinuity in a solid. The Journal of the Acoustical Society of America, 1958. 30(8): p. 771-785.
[12]    Avilés, J. and F.J. Sánchez-Sesma, Piles as barriers for elastic waves. Journal of Geotechnical Engineering, 1983. 109(9): p. 1133-1146.
[13]    Lee, V.W., A note on the scattering of elastic plane waves by a hemispherical canyon. International Journal of Soil Dynamics and Earthquake Engineering, 1982. 1(3): p. 122-129.
[14]    Yang, Y.B. and H.H. Hung, A parametric study of wave barriers for reduction of train‐induced vibrations. International journal for numerical methods in engineering, 1997. 40(20): p. 3729-3747.
[15]    Jesmani, M., M.R. Shafie, and R. SadeghiVileh, Finite element analysis of active isolation of deep foundation in clayey soil by rectangular trenches. Electronic Journal of Geotechnical Engineering, 2008. 13(E): p. 143-152.
[16]    Jesmani, M., A.M. Fallahi, and H.F. Kashani, Study of passive isolation of deep foundation in sandy soil by rectangular trenches. EJGE J, 2011. 16: p. 1297-1317.
[17]    Jesmani, M., A.M. Fallahi, and H.F. Kashani, Effects of geometrical properties of rectangular trenches intended for passive isolation in sandy soils. Earth Science Research, 2012. 1(2): p. 137.
[18]    Saikia, A. and U.K. Das, Analysis and design of open trench barriers in screening steady-state surface vibrations. Earthquake Engineering and Engineering Vibration, 2014. 13: p. 545-554.
[19]    Younesian, D. and M. Sadri, Performance analysis of multiple trenches in train-induced wave mitigation. Journal of Low Frequency Noise, Vibration and Active Control, 2014. 33(1): p. 47-63.
[20]    Esmaeili, M., J.A. Zakeri, and S.A. Mosayebi, Investigating the optimized open V-shaped trench performance in reduction of train-induced ground vibrations. International Journal of Geomechanics, 2014. 14(3): p. 04014004.
[21]    Zakeri, J.-A., M. Esmaeili, and S.-A. Mosayebi, Numerical investigation of the effectiveness of a step-shaped trench in reducing train-induced vibrations. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2014. 228(3): p. 298-306.
[22]    Bo, Q., L. Ali, and D.-M. Irini, Numerical study of wave barrier and its optimization design. Finite Elements in Analysis and Design, 2014. 84: p. 1-13.
[23]    Hamdan, N., O. Laghrouche, P.K. Woodward, and M.S. Mahmood, Ground vibration reduction analysis using a frequency-domain finite element approach. Construction and Building Materials, 2015. 92: p. 95-103.
[24]    Liyanapathirana, D.S. and S.D. Ekanayake, Application of EPS geofoam in attenuating ground vibrations during vibratory pile driving. Geotextiles and Geomembranes, 2016. 44(1): p. 59-69.
[25]    François, S., et al., Design and efficiency of a composite vibration isolating screen in soil. Soil Dynamics and Earthquake Engineering, 2012. 39: p. 113-127.
[26]    Shrivastava, R.K. and N.S.V.K. Rao, Response of soil media due to impulse loads and isolation using trenches. Soil Dynamics and Earthquake Engineering, 2002. 22(8): p. 695-702.
[27]    Dasgupta, B., D.E. Beskos, and I.G. Vardoulakis, Vibration isolation using open or filled trenches Part 2: 3-D homogeneous soil. Computational Mechanics, 1990. 6(2): p. 129-142.
[28]    Al-Hussaini, T.M. and S. Ahmad, Design of wave barriers for reduction of horizontal ground vibration. Journal of geotechnical engineering, 1991. 117(4): p. 616-636.
[29]    Al-Hussaini, T.M. and S. Ahmad, Active isolation of machine foundations by in-filled trench barriers. Journal of Geotechnical Engineering, 1996. 122(4): p. 288-294.
[30]    Sivakumar Babu, G.L., A. Srivastava, K.S. Nanjunda Rao, and S. Venkatesha, Analysis and design of vibration isolation system using open trenches. International Journal of Geomechanics, 2011. 11(5): p. 364-369.
[31]    Murillo, C., L. Thorel, and B. Caicedo, Ground vibration isolation with geofoam barriers: Centrifuge modeling. Geotextiles and Geomembranes, 2009. 27(6): p. 423-434.
[32]    Çelebi, E., et al., Field experiments on wave propagation and vibration isolation by using wave barriers. Soil dynamics and earthquake engineering, 2009. 29(5): p. 824-833.
[33]    Fırat, S., et al., Field Experiments on Wave Propagation and Vibration Isolation by Using Wave Barriers. 2010: IntechOpen.
[34]    Alzawi, A. and M.H. El Naggar, Full scale experimental study on vibration scattering using open and in-filled (GeoFoam) wave barriers. Soil Dynamics and Earthquake Engineering, 2011. 31(3): p. 306-317.
[35]    Connolly, D., Ground borne vibrations from high speed trains. 2013.
[36]    Xiong, W. and Y. Li, Seismic isolation using granulated tire–soil mixtures for less‐developed regions: experimental validation. Earthquake Engineering & Structural Dynamics, 2013. 42(14): p. 2187-2193.
[37]    Coulier, P., et al. Numerical and experimental study of stiff wave barriers for the mitigation of railway induced vibrations. KATHOLIEKE UNIV LEUVEN, DEPT WERKTUIGKUNDE.
[38]    Ulgen, D. and O. Toygar, Screening effectiveness of open and in-filled wave barriers: a full-scale experimental study. Construction and Building Materials, 2015. 86: p. 12-20.
[39]    Miller, G.F., H. Pursey, and E.C. Bullard, On the partition of energy between elastic waves in a semi-infinite solid. Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1955. 233(1192): p. 55-69.
[40]    Itasca, C.G., UDEC 4.0 User's Manual. Minneapolis, USA, 2004.
[41]    UDEC, Itasca C. G; UDEC 4 Manual. 2004, Minneapolis.
[42]    Zhou, Y. and J. Zhao, Advances in Rock Dynamics, and Applications. 2011, London, UK: CRC Press: Taylor & Francis Group.
[43]    Starfield, A.M. and J.M. Pugliese, Compression waves generated in rock by cylindrical explosive charges: A comparison between a computer model and filed measurements. International Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts, 1974. 5: p. 65-77.
[44]    Simha, K. Stress wave patterns in tailore pulse loading. in Proceedings of the 4th International Symposium on Rock Fragmentation by Blasting, FRAGBLAST-4. 1993.
[45]    Hongtao, X., L. Wenbo, and Z. Chaungbing. Effect of Dynamic Unloading during the Process of Rock Fragmentation by Blasting. in International Proceedings of Rock Fragmentation by Blasting, Fragblast-8. 2006. Santiago-chile.
[46]    Kim, D., et al. Development of a new center-cut method: SAV-cut (Stage Advance V-cut). Underground Space. in the 4th Dimension of Metropolises. 2007. London: Taylor & Francis Group.
[47]    Yoon, J. and S. Jeon. Use of a Modified Particle-Based Method in Simulating Blast-Induced Rock Fracture. in Proceedings of the 9th International Symposium on Rock Fragmentation by Blasting, Fragblast 9. 2010. Granada, Spain: CRC Press: Taylor & Francis Group.
[48]    Bakhshandeh Amnieh, H. and M. Bahadori, Numerical and field analysis of single-hole blasting mechanism in conglomerate rock mass of Gotvand Olya Dam. Energy Engineering Management, 2012a. 2(1): p. 22-31.
[49]    Li, X., et al., Numerical study on fracture control blasting using air–water coupling. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023. 9(1): p. 29.

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History

  • Receive Date: 16 March 2024
  • Revise Date: 06 June 2024
  • Accept Date: 27 June 2024

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