Related Products
A Preliminary Investigation Into the Geotechnical Interpretation of Geophysical Logs
2004
Compares a full suite of downhole sondes against geotechnical core logging over the 5 m above three coal seams, for geologists and rock engineers assessing roof conditions.
What this report foundGeophysical logging of boreholes above three Witbank seams identified clay rich matrices, stiffness changes, bedding planes and the principal stress direction...
R1500,00
Geophysical logging of boreholes above three Witbank seams identified clay rich matrices, stiffness changes, bedding planes and the principal stress direction, and picked up fractures in 30 to 75 per cent of cases. Core logging found most of the same features faster, so routine use was not recommended unless stiffness and stress direction matter.
Dry Screening Tests Conducted With a Bivi-tec Screen
2008
Screening trials at two South African collieries, one on a small test unit and one on a full scale installation, for plant staff handling fine, damp coal.
What this report foundFine coal was screened at small apertures while surface moisture stayed below about 5 per cent.
R1500,00
200820 pages
Fine coal was screened at small apertures while surface moisture stayed below about 5 per cent. Above that, fines adhered to the coarser particles and screening became very difficult. The dual vibrating polyurethane mats stopped blinding and clogging, so screening area stayed available, but the screen action still could not dislodge fines from very damp coal.