Coaltech Research Association

Kloppersbos Explosibility Laboratory Upgrade

R Bergh

By R Bergh | 9 January 2026

R1500,00

Description

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Models for Predicting Methane Gas Release from Coal Seams

Alan Cook

2005

Emission factors and calculation models for national greenhouse gas reporting, built from mine seam gas measurements and ventilation sampling, for environmental staff and inventory compilers.

What this report foundEmission factors derived from measured South African seam gas data give simple models for methane released by underground mining, surface mining and coal after...

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Alan Cook

What this report found

Emission factors derived from measured South African seam gas data give simple models for methane released by underground mining, surface mining and coal after mining. Applied across the industry they put total methane emissions at 52 000 to 93 000 tons a year. The models follow the IPCC Tier 2 approach using country specific factors.

Verification of the New Coal Pillar Strength Formula and Investigations Into the Prediction of Pillar Life in Witbank and Highveld Coalfields

I Canbulat

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Covers pillar load and strength estimation, the limits of tributary area theory, and the extraction gains available from revised strength formulae, for rock engineers designing bord and pillar workings.

What this report foundLaboratory testing showed coal specimen strength rising linearly with width to height ratio and falling exponentially with specimen size, the size effect...

R1500,00

R1500,00

I Canbulat

What this report found

Laboratory testing showed coal specimen strength rising linearly with width to height ratio and falling exponentially with specimen size, the size effect becoming insignificant beyond about 2 m diameter. The slope of that relationship was the same for coals from different mines, while the intercept varied with specimen size.

M T Mnisi

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