In-ground vibration propagation characteristics during underground blasting

Jung-Gyu Kim¹, Jong-Gwan Kim², Mahrous A.M. Ali³

¹Chonnam National University, Gwangju, Korea

²Korea Resources Corporation, Wonju, Korea

³Al-Azhar University, Qena, Egypt

Min. miner. depos. 2019, 13(4):1-8

https://doi.org/10.33271/mining13.04.001

Full text (PDF)

ABSTRACT

Purpose. In this study, we investigated the vibration propagation characteristics in ground caused by the explosion pressures during ground and underground blasting. In addition, the use of Styrofoam as a simulation medium, which represents the void during underground blasting, was investigated.

Methods. The investigation method is the measuring and comparing the vibrations using variable trinitrotoluene (TNT) charge amounts and underground volumetric spaces.

Findings. The regression analysis results based on experimental calculations indicated that the vibration levels were lower and vibration attenuation occurred more rapidly during underground blasting than those during ground blasting.

Originality.As the underground volumetric space increased, the vibration levels lowered and vibration attenuation became more gradual.

Practical implications. The use of Styrofoam to simulate the void in the underground space during blasting was deemed inappropriate, however, Styrofoam may be appropriate as a medium for low-impedance grounds.

Keywords: explosion pressure, ground blasting, underground blasting, regression analysis, styrofoam

REFERENCES

Akbari, M., Lashkaripour, G., Yarahamdi Bafghi, A., & Ghafoori, M. (2015). Blastability evaluation for rock mass fragmentation in Iran central iron ore mines. International Journal of Mining Science and Technology, 25(1), 59-66.
https://doi.org/10.1016/j.ijmst.2014.11.008

Avellan, K., Belopotocanova, E., & Puurunen, M. (2017). Measuring, monitoring and prediction of vibration effects in rock masses in near-structure blasting. Procedia Engineering, (191), 504-511.
https://doi.org/10.1016/j.proeng.2017.05.210

Gheibie, S., Aghababaei, H., Hoseinie, S.H., & Pourrahimian, Y. (2009). Modified Kuz-Ram fragmentation model and its use at the Sungun Copper Mine. International Journal of Rock Mechanics and Mining Sciences, 46(6), 967-973.
https://doi.org/10.1016/j.ijrmms.2009.05.003

Gui, Y.L., Zhao, Z.Y., Zhou, H.Y., Goh, A.T.C., & Jayasinghe, L.B. (2017). Numerical simulation of rock blasting induced free field vibration. Procedia Engineering, (191), 451-457.
https://doi.org/10.1016/j.proeng.2017.05.203

Kabwe, E. (2018). Velocity of detonation measurement and fragmentation analysis to evaluate blasting efficacy. Journal of Rock Mechanics and Geotechnical Engineering, 10(3), 523-533.
https://doi.org/10.1016/j.jrmge.2017.12.003

Kamel, M., Abdellah, H., Korichi, T., & Abderazzak, S. (2015). Study of the influence factorson rock blasting. Procedia Earth and Planetary Science, (15), 900-907.
https://doi.org/10.1016/j.proeps.2015.08.143

Kumar, R., Choudhury, D., & Bhargava, K. (2016). Determination of blast-induced ground vibration equations for rocks using mechanical and geological properties. Journal of Rock Mechanics and Geotechnical Engineering, 8(3), 341-349.
https://doi.org/10.1016/j.jrmge.2015.10.009

Morin, M.A., & Ficarazzo, F. (2006). Monte Carlo simulation as a tool to predict blasting fragmentation based on the Kuz-Ram model. Computers & Geosciences, 32(3), 352-359.
https://doi.org/10.1016/j.cageo.2005.06.022

Nur Lyana, K., Hareyani, Z., Kamar Shah, A., & Mohd Hazi-zan, M.H. (2016). Effect of geological condition on degree of fragmentation in a Simpang Pulai marble quarry. Procedia Chemistry, (19), 694-701.
https://doi.org/10.1016/j.proche.2016.03.072

Singh, P.K., Roy, M.P., Paswan, R.K., Sarim, M., Kumar, S., & Ranjan Jha, R. (2016). Rock fragmentation control in opencast blasting. Journal of Rock Mechanics and Geotechnical Engineering, 8(2), 225-237.
https://doi.org/10.1016/j.jrmge.2015.10.005

Tripathy, G.R., Shirke, R.R., & Kudale, M.D. (2016). Safety of engineered structures against blast vibrations: A case study. Journal of Rock Mechanics and Geotechnical Engineering, 8(2), 248-255.
https://doi.org/10.1016/j.jrmge.2015.10.007

Wojtecki, Ł., Mendecki, M.J., & Zuberek, W.M. (2017). Determination of destress blasting effectiveness using seismic source parameters. Rock Mechanics and Rock Engineering, 50(12), 3233-3244.
https://doi.org/10.1007/s00603-017-1297-9

Zhang, L., Yang, Q., & Liu, Y. (2016). Long-term stability analysis of the left bank abutment slope at Jinping I hydropower station. Journal of Rock Mechanics and Geotechnical Engineering, 8(3), 398-404.
https://doi.org/10.1016/j.jrmge.2015.08.010