Removal of gas from the coal seam and surrounding strata has proven to be an effective method in reducing or eliminating outbursts. The benefits of gas drainage are: Gas given off from the virgin coal is reduced so that gas percentage in intake airways and at working faces are kept […]

In 1994 and following a fatality at West Cliff Colliery relating to an outburst incident, a notice under section 61 of the Coal Mines Regulation Act, 1982 was issued to all mines operating in the Bulli seam. This notice enforced gas threshold values on these mines to the extent that […]