Mr Hebert is a geotechnical engineer with experience in both the mining and civil industries. He has provided consulting on many projects including underground mining (e.g. block cave mining, pillar stability), open pit mining, underground excavations (e.g. tunnels, caverns, nuclear waste storage) and dams.
This webinar is for people who are new or occasional 3DEC users, or those just interested in learning more about it.
This hands-on, virtual training course is 16 hours total, spread over four days in a 1.5-week period, and covers the analysis of embankment dams using FLAC.
Karen joined Itasca Australia in 2017, and with a background in marketing and process improvement, she provides administration support to the team and manages software sales for the region.
A 3D groundwater flow model was constructed using MINEDW  to simulate pore pressure at the Chuquicamata open pit mine slope in Chile. Three main factors required the implementation of a 3D model for the prediction of pore pressures: (1) discrete zones of recharge in the gravel zone lead to the non-uniform flow field; (2) the low-permeability west fault and shear zones maintain the non-hydrostatic pore-pressure distribution with depth during mining; and (3) the drainage gallery causes localized depressurization. In addition, a zone of relaxation (ZOR) was observed at the site. Simulations of the development of the ZOR according to the mining schedule are important in the prediction of pore-pressure distribution within the slope.
The model was calibrated against measured water levels, pore pressures, drains, and seepage rates. The calibrated model was then used to simulate and predict pore-pressure distribution in the pit walls for different time periods. Specifically, the model was able to capture the non-hydrostatic, transient nature of the pore pressures with depth in the granodiorite west of the shear zone, in the shear zone, and along the west fault. The model also simulated the ZOR for the first 150 m below the pit bench with enhanced hydraulic conductivity values according to the excavation schedule. Simulated transient 3D pore-pressure distribution provides a more realistic input to 3DEC slope-stability analyses.
Liu, H., F. Duran del Valle, J. Xiang, and B. Șener Kaya. 2012. Simulation of three-dimensional pore-pressure distribution for slope-stability analysis. 46th US Rock Mechanics/Geomechanics Symposium, Chicago, IL, 24-27 June.
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