Queensland Consolidated Regulations

COAL MINING SAFETY AND HEALTH REGULATION 2017 - REG 242

242 Intake airways

(1) At least 1 automatic methane detector must be located in each intake airway at the interface between—

(a) a NERZ and ERZ1; and

(b) 2 NERZs.

Example of interface between 2 NERZs—

the interface between subdivided parts of a NERZ

(2) A detector located at an interface between a NERZ and ERZ1 must—

(a) when the general body concentration of methane detected at the interface exceeds 0.25%—automatically activate a visible alarm; and

(b) when the general body concentration of methane detected at the interface exceeds 0.5%—automatically trip the electricity supply to non-intrinsically safe plant in—

(i) the ERZ1 and NERZ; or

(ii) if the NERZ has been subdivided—the ERZ1 and the subdivided part of the NERZ adjacent to the ERZ1.

(3) A detector located at the interface between a NERZ and an ERZ1 must be a self-contained unit or part of the gas monitoring system for the mine.

(4) A detector located at an interface between 2 NERZs must—

(a) automatically activate a visible alarm when the general body concentration of methane detected at the interface exceeds 0.25%; and

(b) if the NERZ has been subdivided—automatically trip the electricity supply to non-intrinsically safe plant in the adjacent subdivided part when the general body concentration of methane detected at the interface exceeds 0.5%.

(5) The alarm mentioned in subsection (2) (a) or (4) (a) must be visible at the interface.