Cone resistance and soil state of tailing sand deposits using the Material Point Method
Cone resistance and soil state of tailing sand deposits using the Material Point Method
Cone penetration tests (CPTs) can quantify the mechanical state of a sand. Typically, calibration chamber (CC) test data are the preferred method to correlate a soil's state with the CPT-acquired data. However, many (if not most) mine tailings are different from the soils historically used in CC studies, as these tests were mostly conducted at denser states than typically found in tailings storage facilities (TSFs) as well as primarily using clean sands.
Recently, the University of Western Australia developed a small-scale CC and performed many tests on a range of different tailings materials. This paper provides new evidence of the value added to this area by modern large-deformation modelling based on the material point method (MPM). This study relies on the predictive capabilities of the critical state NorSand model. Results of MPM-CPT simulations are compared against CC tests. MPM-CPT simulations of increasing quality will positively impact the state of the art of CPT interpretation procedures, which to date is still largely based on simplified cavity expansion theories, calibrated to different materials to those usually found in TSFs.
Juan Ayala; Mario Martinelli; David Reid; Andy Fourie
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
10. Tunnelling and mining applications
https://doi.org/10.53243/NUMGE2023-195
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