ENVIRONMENT

Shield removal sends gas levels above 2%

LONGWALL mines should review their windblast management plans to include longwall take-offs, Mine Safety New South Wales has warned, after a high potential incident at a NSW underground coal mine where gas levels reached 2.69%.

Lou Caruana
Shield removal sends gas levels above 2%

During the removal of shields on a longwall faceline, the goaf caved behind the buttress supports for a distance of about 30 shields.  This caused gas from the goaf area to be pushed into the return...

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