The validity of Es/Ep as a source parameter in mining seismology

Authors: Morkel, IG; Wesseloo, J; Potvin, Y

DOI https://doi.org/10.36487/ACG_rep/1952_29_Morkel

Cite As:
Morkel, IG, Wesseloo, J & Potvin, Y 2019, 'The validity of Es/Ep as a source parameter in mining seismology', in W Joughin (ed.), Deep Mining 2019: Proceedings of the Ninth International Conference on Deep and High Stress Mining, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 385-398, https://doi.org/10.36487/ACG_rep/1952_29_Morkel

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Abstract:
It is generally accepted that the ratio of energy associated with the S-wave (Es) and P-wave (Ep) is dependent on the focal mechanism (Mendecki (2013). In the mining industry, the ratio of S-wave energy to P-wave energy is regarded as an important indicator of the type of focal mechanism, with the ratio being lower for explosive sources and higher for fault slip (Cai et al 1998, Mendecki, 2013). In pure shear, the Es is considerably larger than Ep (Es/Ep > 20). For the tensile model, Sato (1978) has shown that Ep and Es are approximately equal. Gibowicz et al (1991) and Gibowicz and Kijko (1994) suggest that when Es/Ep < 10, the source mechanism involves a tensile failure component. Boatwright and Fletcher (1984) suggest pure shear to correspond with Es/Ep > 10. Hudyma and Potvin (2010) suggest that for events with Es/Ep < 3, the mechanism is non-shear. This paper investigates the Es/Ep ratio parameter and how sensitive it is to different seismic service setups. It will achieve this by investigating the consistency of the parameter for three different scenarios.

References:
Abolfazlzadeh, Y. and Hudyma, M. (2016). Identifying and Describing a Seismogenic Zone in a Sublevel Caving Mine. Rock Mechanics and Rock Engineering, 1-17.
Abolfazlzadeh, Y., Penhall, S.L. and McKinnon, S.D. (2017). Statistical Analysis of the Outlier Events from Seismic Stress Inversion. Proceedings of Proceedings of the First International Conference on Underground Mining Technology. Hudyma, M. and Potvin, Y., (eds.), Perth, Australian Centre for Geomechanics, pp. 269-277.
Abolfazlzadeh, Y., Smith-Bougher, L., Anderson, Z., Jalbout, A. and Mataseje, A. (2019). Calibration of a Seismic Hazard Assessment Tool Using Velocity Fields and Geotechnical Data. Proceedings of Proceedings of the First International Conference on Mining Geomechanical Risk. Wesseloo, J., (ed.), Perth, Australian Centre for Geomechanics, pp. 233-244.
Aki, K. and Richards, P.G. (2002). Quantitative Seismology.
Boatwright, J. and Fletcher, J.B. (1984). The Partition of Radiated Energy between P and S Waves. Bulletin of the Seismological Society of America, 74 (2), 361-376.
Cai, M., Kaiser, P.K. and Martin, C.D. (1998). A Tensile Model for the Interpretation of Microseismic Events near Underground Openings. Seismicity Caused by Mines, Fluid Injections, Reservoirs, and Oil Extraction. Springer.
Disley, N.V. (2014). Seismic Risk and Hazard Management at Kidd Mine. Proceedings of Proceedings of the Seventh International Conference on Deep and High Stress Mining. Hudyma, M. and Potvin, Y., (eds.), Perth, Australian Centre for Geomechanics, pp. 107-121.
Gibowicz, S., Young, R., Talebi, S. and Rawlence, D. (1991). Source Parameters of Seismic Events at the Underground Research Laboratory in Manitoba, Canada: Scaling Relations for Events with Moment Magnitude Smaller Than− 2. Bulletin of the Seismological Society of America, 81 (4), 1157-1182.
Gibowicz, S.J. and Kijko, A. (1994). An Introduction to Mining Seismology, First, Academic Press, Inc.
Hudyma, M. and Potvin, Y.H. (2010). An Engineering Approach to Seismic Risk Management in Hardrock Mines. Rock Mechanics and Rock Engineering, 43 (6), 891-906.
Hudyma, M.R. (2008). Analysis and Interpretation of Clusters of Seismic Events in Mines. PhD, University of Western Australia.
McGaughey, J., McLeod, R. and Pears, G. (2007). Integrated, Real-Time, 3d Gis-Based Geotechnical Hazard Assessment. Proceedings of 1st Canada-US Rock Mechanics Symposium, Rock Mechanics Meeting Society's Challenges and Demands. Eberhardt, E., Stead, D. and Tom, M., (eds.), London, Taylor & Francis Group, pp. 21-28.
McGaughey, W.J. (2014). 4d Data Management and Modelling in the Assessment of Deep Underground Mining Hazard. Proceedings of Proceedings of the Seventh International Conference on Deep and High Stress Mining. Hudyma, M. and Potvin, Y., (eds.), Perth, Australian Centre for Geomechanics, pp. 93-106.
Mendecki, A.J. (2013). Mine Seismology: Glossary of Selected Terms. Proceedings of Eighth International Symposium on Rockbursts and Seismicity in Mines, RaSiM8. Malovichko, A. and Malovichko, D., (eds.), Geophysical Survey of Russian Academy of Sciences, Mining Institute of Ural Branch of Russian Academy of Sciences, pp. 527-551.
Nordström, E., Dineva, S. and Nordlund, E. (2017). Source Parameters of Seismic Events Potentially Associated with Damage in Block 33/34 of the Kiirunavaara Mine (Sweden). Acta Geophysica.
Rebuli, D.B. and Kohler, S.J. (2014). Using Clustering Algorithms to Assist Short-Term Seismic Hazard Analysis in Deep South African Mines. Proceedings of Proceedings of the Seventh International Conference on Deep and High Stress Mining. Hudyma, M. and Potvin, Y., (eds.), Perth, Australian Centre for Geomechanics, pp. 699-708.
Reyes-Montes, J.M., Sainsbury, B.L., Pettitt, W.S., Pierce, M. and Young, R.P. (2010). Microseismic Tools for the Analysis of the Interaction between Open Pit and Underground Developments. Proceedings of Proceedings of the Second International Symposium on Block and Sublevel Caving. Potvin, Y., (ed.), Perth, Australian Centre for Geomechanics, pp. 119-131.
Salvoni, M. and Dight, P.M. (2016). Rock Damage Assessment in a Large Unstable Slope from Microseismic Monitoring-Mmg Century Mine (Queensland, Australia) Case Study. Engineering Geology, Vol. 210, pp. 45-56.
Salvoni, M., Morkel, I.G. and Dight, P.M. (2016a). Microseismic Data — a Comparison between Routine Trigger Method and Continuous Data Processing. Proceedings of Proceedings of 1st Asia Pacific Slope Stability in Mining Conference. Dight, P.M., (ed.).
Salvoni, M., Morkel, I.G. and Dight, P.M. (2016b). Microseismic Data — a Comparison between Routine Trigger Method and Continuous Data Processing. Proceedings of 1st Asia Pacific Slope Stability in Mining Conference in Brisbane, Australia, 6–8 September 2016, pp. 639-656.
Sato, T. (1978). A Note on Body Wave Radiation from Expanding Tension Crack.
Sweby, G., Trifu, C., Goodchild, D. and Morris, L. (2006). High Resolution Seismic Monitoring at Mt Keith Open Pit Mine. Proceedings of Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS). American Rock Mechanics Association, pp. 6.
Wesseloo, J. and Sweby, G.J. (2008). Microseismic Monitoring of Hard Rock Mine Slopes. Proceedings of First Southern Hemisphere International Rock Mechanics Symposium, SHIRMS 2008. Potvin, Y., Carter, J., Dyskin, A. and Jeffrey, R., (eds.), Perth, Western Australia, Australian Centre for Geomechanics, pp. 433–450.




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