Coaltech Research Association

Economic Coal Resources of the Highveld, Ermelo, South Rand and Sasolburg-vereeniging Coalfields

Grant van Heerden

Comparative ranking of coalfields inside and outside South Africa on exploration level, resource size and infrastructure, for companies deciding where to explore next.

by Grant van Heerden | August 2004

What this report found

A rating and ranking system was applied to South African coalfields and, separately, to the coal bearing countries elsewhere in the Southern African Development Community. The Waterberg ranked highest in South Africa and is the coalfield most worth detailed investigation as Witbank output declines. Botswana ranked highest among the other member states on contained resources and exploitation potential.

R1500,00

Description

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Project 8.3.3 – Framework to Guide Mine-related Land Use Planning Towards Optimisation of the Coal Mining Rehabilitated Landscape

Raina Hattingh

2018

Masters research combining a review of rehabilitation guidance with South African industry interviews, for mine planners and regulators deciding what post mining land should become after closure.

What this report foundA framework for planning land use on rehabilitated coal mining land, built from a review of international and national regulatory and corporate guidance and...

R1500,00

R1500,00

Raina Hattingh

What this report found

A framework for planning land use on rehabilitated coal mining land, built from a review of international and national regulatory and corporate guidance and from interviews with industry practitioners. The review found that existing guidance requires land to be returned as close as possible to its pre mining condition, while community needs are pushing rehabilitation towards alternative land uses that can sustain livelihoods.

Can old bord-and-pillar workings be mapped from surface?

M van Schoor

2016

Desktop review updating two earlier assessments, weighing borehole scanning, robots and unmanned aerial platforms as routes to locating old workings ahead of opencast drilling and blasting.

What this report foundNo surface geophysical method can map individual bords and pillars at the depths typical of the Witbank coalfield, a limit the review attributed to physics...

R1500,00

R1500,00

M van Schoor

What this report found

No surface geophysical method can map individual bords and pillars at the depths typical of the Witbank coalfield, a limit the review attributed to physics rather than to technology, since the targets are small relative to their depth and conductive layers often lie above the seam. Borehole laser scanning remains the workable option, with sonar suited to flooded workings.

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

R1500,00

What this report found

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.

Cost Evaluation of Different Medium Solids for Air Dense Medium Fluidized Bed Coal Separation

Kundayi Marshall Chagwedera

2017

University laboratory work on air fluidised bed separation, testing pyrrhotite, blast furnace slag, silica sand and coal discards against magnetite, for engineers considering waterless coal washing.

What this report foundMagnetite and pyrrhotite each gave the most uniform and stable fluidised bed densities, with bed density variation under 0.7 per cent.

R1500,00

R1500,00

Kundayi Marshall Chagwedera

What this report found

Magnetite and pyrrhotite each gave the most uniform and stable fluidised bed densities, with bed density variation under 0.7 per cent. A pyrrhotite and magnetite blend at a weight ratio of 40:60 beat magnetite alone, producing a product of 14.50% ash and 27.30 MJ/kg from a feed of 39.27% ash and 18.76 MJ/kg.

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