sec.346Safety and health management system

### sec.346 Safety and health management system An underground mine’s safety and health management system must provide ways of— preventing intake air from travelling across the face of a permanent seal at the mine; and minimising the risks of inrush and leakage, into intake airways, of atmospheric contaminants from goaf areas or sealed workings. Subsection (1) (a) does not apply if the system provides ways of ensuring the following— leakage through the seal is minimised and damage to the seal is prevented; the seal is, as a minimum, a type C seal; a monitoring device is installed in each intake airway on the return side of the seals over which the intake air passes to detect the intake airway’s general body concentration of— oxygen; and carbon dioxide, if it is present behind the seal in a general body concentration greater than 3%; and any other gas that is present behind the seal in a quantity and concentration that is likely to create a risk if the gas enters the intake airway adjacent to the seal; for longwall workings—the monitoring device mentioned in paragraph (c) is positioned at the intersection of the longwall face and the intake airway; the monitoring system for paragraph (c) triggers an alarm to warn each person who may be affected if a gas mentioned in the paragraph is present in a predetermined concentration. s 346 amd 2020 SL No. 118 s 19 (sec.346-ssec.1) An underground mine’s safety and health management system must provide ways of— preventing intake air from travelling across the face of a permanent seal at the mine; and minimising the risks of inrush and leakage, into intake airways, of atmospheric contaminants from goaf areas or sealed workings. (sec.346-ssec.2) Subsection (1) (a) does not apply if the system provides ways of ensuring the following— leakage through the seal is minimised and damage to the seal is prevented; the seal is, as a minimum, a type C seal; a monitoring device is installed in each intake airway on the return side of the seals over which the intake air passes to detect the intake airway’s general body concentration of— oxygen; and carbon dioxide, if it is present behind the seal in a general body concentration greater than 3%; and any other gas that is present behind the seal in a quantity and concentration that is likely to create a risk if the gas enters the intake airway adjacent to the seal; for longwall workings—the monitoring device mentioned in paragraph (c) is positioned at the intersection of the longwall face and the intake airway; the monitoring system for paragraph (c) triggers an alarm to warn each person who may be affected if a gas mentioned in the paragraph is present in a predetermined concentration. - (a) preventing intake air from travelling across the face of a permanent seal at the mine; and - (b) minimising the risks of inrush and leakage, into intake airways, of atmospheric contaminants from goaf areas or sealed workings. - (a) leakage through the seal is minimised and damage to the seal is prevented; - (b) the seal is, as a minimum, a type C seal; - (c) a monitoring device is installed in each intake airway on the return side of the seals over which the intake air passes to detect the intake airway’s general body concentration of— (i) oxygen; and (ii) carbon dioxide, if it is present behind the seal in a general body concentration greater than 3%; and (iii) any other gas that is present behind the seal in a quantity and concentration that is likely to create a risk if the gas enters the intake airway adjacent to the seal; - (i) oxygen; and - (ii) carbon dioxide, if it is present behind the seal in a general body concentration greater than 3%; and - (iii) any other gas that is present behind the seal in a quantity and concentration that is likely to create a risk if the gas enters the intake airway adjacent to the seal; - (d) for longwall workings—the monitoring device mentioned in paragraph (c) is positioned at the intersection of the longwall face and the intake airway; - (e) the monitoring system for paragraph (c) triggers an alarm to warn each person who may be affected if a gas mentioned in the paragraph is present in a predetermined concentration. - (i) oxygen; and - (ii) carbon dioxide, if it is present behind the seal in a general body concentration greater than 3%; and - (iii) any other gas that is present behind the seal in a quantity and concentration that is likely to create a risk if the gas enters the intake airway adjacent to the seal;