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

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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.
Original languageEnglish
Title of host publicationProceedings of the Ninth International Conference on Deep and High Stress Mining
EditorsW Joughin
Place of PublicationJohannesburg
PublisherThe Southern African Institute of Mining and Metallurgy
Pages385-398
Number of pages13
ISBN (Print)978-1-928410-12-6
DOIs
Publication statusPublished - 24 Jun 2019
EventNinth International Conference on Deep and High Stress Mining - Misty Hills Conference Centre, Muldersdrift, South Africa
Duration: 24 Jun 201925 Jun 2019
https://deepmining2019.com/

Conference

ConferenceNinth International Conference on Deep and High Stress Mining
Abbreviated titleDeep Mining 2019
CountrySouth Africa
CityMuldersdrift
Period24/06/1925/06/19
Internet address

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Cite this

Morkel, I., Wesseloo, J., & Potvin, Y. (2019). The validity of Es/Ep as a source parameter in mining seismology. In W. Joughin (Ed.), Proceedings of the Ninth International Conference on Deep and High Stress Mining (pp. 385-398). Johannesburg: The Southern African Institute of Mining and Metallurgy. https://doi.org/10.36487/acg_rep/1952_29_morkel