Coaltech Research Association

The Effects of Weathering on Coal Quality in the Limpopo and Soutpansberg Coalfields

Mandy-Jane Tlou Sebola

Description

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Best Practice Guidelines for the Management of Spontaneous Combustion in Opencast Coal

G Stenzel

2024

Guidelines drawn from site testing at opencast coal operations, including trials of gypsum and fly ash sprays applied with a hydro seeder. For pit supervisors and mine safety staff.

What this report foundPractical guidance for opencast operations covers early detection with low cost thermal cameras, prevention, and the treatment methods in current use: water...

Simulation of Regional Collapses in Bord & Pillar Workings

BECK Engineering

2018

Three dimensional modelling of a documented subsidence event in the Witbank coalfield, aimed at reserves in the seam above old workings that current pillar strength formulae sterilise.

What this report foundFinite element simulation reproduced the rapid collapse of bord and pillar workings in the 2 Seam at a Witbank colliery, showing that progressive pillar...

A Preliminary Investigation Into the Geotechnical Interpretation of Geophysical Logs

Lesley S Jeffrey

2004

Compares a full suite of downhole sondes against geotechnical core logging over the 5 m above three coal seams, for geologists and rock engineers assessing roof conditions.

What this report foundGeophysical logging of boreholes above three Witbank seams identified clay rich matrices, stiffness changes, bedding planes and the principal stress direction...

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