This standard specifies the safety level, scope of application, test methods and judgment rules for underground combustible gases allowed in coal mine explosives. This standard applies to permitted explosives in coal mines.
MT 61-1997 history
2014AQ 1100-2014 Test method and judgment rules for underground combustible gas safety degree of allowable explosives in coal mines
1997MT 61-1997 Test method and judge rules of safety of permissible explosive for coal mining in firedamp