Jeanne WallsJeWal Geotechnical (Pty) Ltd · Geotechical Engineering
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Citations since 2016
1 Research Item
In selecting a suitable method to sink a vertical shaft for underground access, a number of constraints influence the ultimate decision of where and how to develop the shaft, not least among these being safety, development and construction time, and cost. Two additional considerations stand out: these being geotechnical conditions and technology, t...
A stability analysis was carried out for an underground narrow vein room and pillar operation using linear elastic numerical modelling combined with a probability of failure (PoF) approach. The as-mined layout was input into the model to identify areas of increased pillar stress and obtain an average pillar stress (APS) for each pillar in an identi...
A risk evaluation model was developed under funding from the Mine Health and Safety Council (MHSC, SIM060201 Track B) to quantify expected injuries and economic losses resulting from the rockfall hazard associated with a support system in a given geotechnical environment (Joughin et al., 2012a, 2012b). The technology enables the selection of a suit...
Analysis of the refracted arrivals on a seismic reflection profile recorded along the wall of a tunnel at an iron mine near Thabazimbi, South Africa, shows variations in P-wave velocity in dolomite away from the de-stressed zone that vary between 4.4 and 7.2 km/s, though values greater than 5.8 km/s predominate along most of the profile. The seismi...
Been asked to provide guidance for TBM support design using the Scolari table but this is something I'm not familiar with. anyone with a reference will be helpful. Thank you.