Abstract
Geotechnical characterization and 3D modelling of the biologically cemented Mandena heavy mineral sand deposit - a case study
Highlights
# 12(,3, Biological cementation of the Mandena heavy mineral sand deposit in Madagascar was causing difficulty in dredge mining and in planning and control of production rates
%54*-672)74+67(-2.6" During the commissioning phase it was found that mining production was being hampered by biologically cemented/indurated layers encountered within the sands
It appears that the bacteria produce an extracellular polysaccharide, which form a gelling biofilm to trap nutrients
Summary
# 12(,3, Biological cementation of the Mandena heavy mineral sand deposit in Madagascar was causing difficulty in dredge mining and in planning and control of production rates. Phase 1 focused on high-density geotechnical rotary core drilling, logging, sampling, and standard penetration testing (SPT) as well as piezocone with pore pressure measurement (CPTu) testing within a limited area.
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