sec.301Incombustible material content for mine roadway dust

### sec.301 Incombustible material content for mine roadway dust The underground mine manager for an underground mine must ensure the content of incombustible material in roadway dust at the mine is kept at or above the following concentration level— for dust in a panel roadway within 200m outbye the last completed line of cut-throughs in the panel—85%; for dust in a 200m section of panel roadway within 400m of a longwall face—85%; for dust in a panel roadway within 200m from the main roadway, if paragraphs (a) and (b) do not apply to the 200m section of the roadway—80%; for dust in a return roadway not mentioned in paragraphs (a) to (c) —80%; for dust in an intake roadway not mentioned in paragraphs (a) to (d) —70%. The underground mine manager must also ensure— each 50m length of a roadway that is being driven at the mine is stonedusted, or treated with another coal dust explosion inhibitor immediately after the length is driven; and each part of the roadway is stonedusted or treated with another coal dust explosion inhibitor within 24 hours after the part is driven. Subsections (1) and (2) do not apply to dust in a roadway where there is a sufficient natural make of water associated with the mining operation to prevent a coal dust explosion. Also, subsection (1) does not apply to dust in a part of the mine mentioned in the subsection if— an explosion inhibitor, including, for example, a chemical, is used as a coal dust suppressant in combination with stonedust in the part; and a physical test, other than a laboratory test, of the combination carried out by a nationally accredited testing station has shown the combination to effectively suppress a coal dust explosion. (sec.301-ssec.1) The underground mine manager for an underground mine must ensure the content of incombustible material in roadway dust at the mine is kept at or above the following concentration level— for dust in a panel roadway within 200m outbye the last completed line of cut-throughs in the panel—85%; for dust in a 200m section of panel roadway within 400m of a longwall face—85%; for dust in a panel roadway within 200m from the main roadway, if paragraphs (a) and (b) do not apply to the 200m section of the roadway—80%; for dust in a return roadway not mentioned in paragraphs (a) to (c) —80%; for dust in an intake roadway not mentioned in paragraphs (a) to (d) —70%. (sec.301-ssec.2) The underground mine manager must also ensure— each 50m length of a roadway that is being driven at the mine is stonedusted, or treated with another coal dust explosion inhibitor immediately after the length is driven; and each part of the roadway is stonedusted or treated with another coal dust explosion inhibitor within 24 hours after the part is driven. (sec.301-ssec.3) Subsections (1) and (2) do not apply to dust in a roadway where there is a sufficient natural make of water associated with the mining operation to prevent a coal dust explosion. (sec.301-ssec.4) Also, subsection (1) does not apply to dust in a part of the mine mentioned in the subsection if— an explosion inhibitor, including, for example, a chemical, is used as a coal dust suppressant in combination with stonedust in the part; and a physical test, other than a laboratory test, of the combination carried out by a nationally accredited testing station has shown the combination to effectively suppress a coal dust explosion. - (a) for dust in a panel roadway within 200m outbye the last completed line of cut-throughs in the panel—85%; - (b) for dust in a 200m section of panel roadway within 400m of a longwall face—85%; - (c) for dust in a panel roadway within 200m from the main roadway, if paragraphs (a) and (b) do not apply to the 200m section of the roadway—80%; - (d) for dust in a return roadway not mentioned in paragraphs (a) to (c) —80%; - (e) for dust in an intake roadway not mentioned in paragraphs (a) to (d) —70%. - (a) each 50m length of a roadway that is being driven at the mine is stonedusted, or treated with another coal dust explosion inhibitor immediately after the length is driven; and - (b) each part of the roadway is stonedusted or treated with another coal dust explosion inhibitor within 24 hours after the part is driven. - (a) an explosion inhibitor, including, for example, a chemical, is used as a coal dust suppressant in combination with stonedust in the part; and - (b) a physical test, other than a laboratory test, of the combination carried out by a nationally accredited testing station has shown the combination to effectively suppress a coal dust explosion.