Coaltech Research Association

Agricultural Research on Rehabilitated Coal Mined Land (1994-2001) Conducted in Terms of the Kraai Van Niekerk Report

JL Schoeman

Consolidated review of six field studies on highveld opencast rehabilitation, covering soil profiles, pasture performance, crop potential and soil water, for mine environmental staff and regulators.

What this report found

Rehabilitated opencast soils carried pastures and cash crops, but compaction and cover soil depth set the ceiling on what they could produce. Only land with deep cover soils suited maize and sunflower, and deep ripping with regular tillage was needed. Bulk density standards were not met at the trial sites, which the review judged enough to have changed the results.

R1500,00

Description

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R1500,00

Fine Coal Dense-medium Cyclone Tests Conducted at Leeuwpan Coal Mine

GJ de Korte

2007

Pilot dense medium cyclone testing on fine coal inside a working spiral plant at a Mpumalanga opencast mine, ending in a full scale plant design.

What this report foundDense medium cyclones on the fine coal fraction lifted product yield well above the spiral circuit they were compared against and gave closer control of...

R1500,00

R1500,00

GJ de Korte

200720 pages

What this report found

Dense medium cyclones on the fine coal fraction lifted product yield well above the spiral circuit they were compared against and gave closer control of product quality. Cut point density control proved the hardest part of running the plant, medium properties being critical. Magnetic separator capacity had to match the duty, and a basement was needed to contain and recover medium spillage.

Identify Remnant Coal Deposits for Potential Exploitation by Small Business Developments

2002

Screening of near surface remnant coal for small scale miners in Mpumalanga, with a map of candidate areas and of ground already worked out.

What this report foundShallow coal suitable for small scale opencast working was mapped in the northern Witbank and Highveld coalfields, using a limit of 30 m from surface to the...

R1500,00

R1500,00

What this report found

Shallow coal suitable for small scale opencast working was mapped in the northern Witbank and Highveld coalfields, using a limit of 30 m from surface to the top of the first seam. Most outcrop areas examined proved already mined out, and depth to the top seam increases southwards, though some ground remains available. Obtaining resource data was the main obstacle.

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