Gassy Mine 2 : A coal mine, metalliferous mine or tunnel in which tests on three successive days indicate the presence of flammable gas in an area, district or main airway on the return side or exhaust side
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}