Coaltech Research Association

Create Sedimentological and Structural Models to Assist in Identifying Geological Features That Impact on Mining

Regional geology mapped in three dimensions from borehole data supplied by three mining groups, built for mine geologists and planners assessing seam disruption before layout design.

by Mark Grodner | December 2001

What this report found

A three dimensional model of the northern Witbank and Highveld coalfield was built from more than 1100 borehole logs, with strata sorted into 13 major groupings and surface topography taken from satellite elevation data. It runs on open source visualisation software rather than a commercial package. Delays limited coverage to about a quarter of the coalfield.

R1500,00

Description

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Rehabilitation of Mined Land – Soil Compaction Alleviation

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Final report on mined land rehabilitation trials comparing pasture species and organic amendments on compacted mine soil against normal agricultural soil, for rehabilitation and pasture planning.

What this report foundExperimental studies tested ways to alleviate compaction on mine soils by combining mechanical treatment with organic material.

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What this report found

Experimental studies tested ways to alleviate compaction on mine soils by combining mechanical treatment with organic material. Survival of 16 pasture species was recorded on mechanically ameliorated compacted soil, dry matter and leaf area were measured for tall fescue and cocksfoot at different levels of organic material, and soil fertility, bulk density and root biomass were tracked under irrigated and dryland grass.

Application of EARTH Ion Exchange Technology to Process RO (Hipro) Brine from eWRP

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Pilot trial on brine from a working water reclamation plant on the Mpumalanga coalfield, the first of four studies testing ion exchange on coal mine liquors.

What this report foundIon exchange applied to brine from a three stage reverse osmosis plant at eMalahleni converted the brine entirely into saleable fertiliser and explosives...

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EARTH

What this report found

Ion exchange applied to brine from a three stage reverse osmosis plant at eMalahleni converted the brine entirely into saleable fertiliser and explosives feedstock, and recovered close to half of the water the reverse osmosis stage leaves behind. On this basis the existing brine pond and the two planned for the plant expansion would not be needed.

Rehabilitation of Mined Land Irrigation of Pastures with Gypsiferous Mine water

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Pasture and animal production work on rehabilitated mine land under mine water irrigation, joining agronomy and animal science, for rehabilitation and closure planners.

What this report foundGrazing trials on tall fescue pasture irrigated with gypsiferous mine water on rehabilitated mined land, run over several seasons.

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What this report found

Grazing trials on tall fescue pasture irrigated with gypsiferous mine water on rehabilitated mined land, run over several seasons. The work covers steer stocking rates, dry matter intake by cattle, and the factors that control pasture quality and intake, among them nitrogen fertilisation, stage of growth, sward structure and grazing intensity. Findings are reported study by study.

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