Predicting the Environmental Impact and Sustainability of Irrigation With Coal Mine Water
Commercial scale field trials and modelling of centre pivot irrigation with gypsiferous and sodium sulphate mine water, covering crop, soil and aquifer effects for mines and regulators.
by J.G. Annandale, Y.G. Beletse, P.C. de Jager, N.Z Jovanovic & J.M. Steyn – University of Pretoria, N. Benadé – NB Systems, S.A. Lorentz – University of Kwazulu Natal, F.D.I. Hodgson, B. Usher, D. Vermeulen – Institute for Groundwater Studies (University of the Free State), M.E. Aken – Anglo Coal Environmental Services | July 2006
Irrigation with calcium and sulphate rich mine water proved feasible and sustainable over eight years at a Mpumalanga colliery, with no significant impact on soil, surface water or groundwater. Sugarbeans, wheat, maize, potatoes and pastures were grown on a commercial scale. High calcium and magnesium suppressed potassium uptake, and waterlogging from poor site selection was the main problem.
R1500,00
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Flammability, corrosion resistance and environment by V Mhlawakhe.pdf
Laboratory work turning high ash coal fines into moulded building composites, comparing coal tar pitch against a silicone binder, with strength, burning, corrosion and leaching tests. For product developers.
What this report foundAir blowing converted coal tar into a pitch with 11.27% volatile matter and 87.68% fixed carbon, which bound high ash coal fines into structural composites.
R1500,00
Air blowing converted coal tar into a pitch with 11.27% volatile matter and 87.68% fixed carbon, which bound high ash coal fines into structural composites. Compressive strengths ran from 106.58 to 344.71 MPa and flexural strengths from 48.75 to 159.30 MPa. Flammability was low across all composites and corrosion rates stayed below those of some commercial ceramic tiles.
Collation of Historic Thermal Imagery
2008
Pilot exercise pulling scattered thermal survey datasets held by companies and research bodies into one mapping system, with a view to tracking coal fires and mine water discharge.
What this report foundExisting thermal imagery of the Witbank coalfield was traced to its holders and assessed for format, quality, resolution and coverage, then brought into one...
R1500,00
Existing thermal imagery of the Witbank coalfield was traced to its holders and assessed for format, quality, resolution and coverage, then brought into one geographic information system with supporting metadata. Satellite thermal bands give a regional picture only; detailed mapping of coal fires or acid drainage discharge needs high resolution aerial surveys.