The introduction of mechanical miners on a large scale in South African Coal Mines has highlighted the need for improved methods of environmental protection to ensure safe and healthy working conditions.

When using this type of rapid advance modern coal winning equipment, a particular concern is the generation of large quantities of coal dust and flammable gas. Recent research has also highlighted the dangers of the lowering of the lower explosion limit when hybrid mixtures (coal dust and flammable gas) exist.

These guidance notes have been primarily prepared to assist the employers in complying with the requirements of the guideline for the compilation of a mandatory Code of Practice for the prevention of flammable gas and coal dust explosions in collieries.