Analysis of possible relationships between seismic properties and some of rock mass geomechanic properties of the outcropping carbonate rock masses in Wadi El-Kaffrien Dam site (Jordan)
- Univ. of Ferrara, Corso Ercole, Ferrara (Italy)
A seismic refraction and a geomechanic surveys were employed in the investigation of possible relationships that may exist between elastic and geomechanic parameters of a number of outcropping carbonate rock masses in the Wadi El-Kaffrein dam site, western Jordan. Seventeen seismic profiles were conducted across the top of vertical exposures where the underlying geologic and structural conditions are quite visible to be studied in detail. Therefore, the correlations could thus be correctly assessed. The above mentioned prospections were completed on limestones, marly- and dolomitic limestones of the Upper Cretaceous age. The seismic survey enabled the determination of the P- and S-wave velocities, the dynamic elastic moduli, in addition, to a number of seismic ratios. While the geomechanic survey resulted in the quantification of some of the geomechanic characteristics of the discontinuities present in the rock masses, in addition, to the assessment of their overall qualities through the employment of two of the widely used classification systems, namely, RMR and Q. The obtained data were subjected to a bi-variate and multi-variate statistical analyses, so that possible correlations could be evidenced. Such analyses considered eighteen seismic and geomechanic properties. Such correlations led to the development of a preliminary classification system for the assessment of rock mass quality, based upon seismically derived parameters as well as J{sub f} and Jn. Concerning the correlations conducted between the RMR- and Q-quality indices and the geoseismic parameters, it resulted that the RMR-indices correlate better to the seismic parameters. Results of the multi-variate regression analysis show that the following geomechanic properties could be estimated with a good approximation: Jn, J{sub f} and RMR, while the prediction of RQD and Q indices can`t be predicted from seismic parameters.
- OSTI ID:
- 381501
- Report Number(s):
- CONF-960477-; TRN: 96:004278-0035
- Resource Relation:
- Conference: 9. annual symposium on the application of geophysics to engineering and environmental problems, Denver, CO (United States), 15 Apr - 1 May 1996; Other Information: PBD: 1996; Related Information: Is Part Of SAGEEP `96: Proceedings of the symposium on the application of geophysics to engineering and environmental problems; Bell, R.S.; Cramer, M.H. [comps.]; PB: 1353 p.
- Country of Publication:
- United States
- Language:
- English
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