QLDIn ForceRegulation
Coal Mining Safety and Health Regulation 2017
sec.242Intake airways
Start here
Get a plain-English read of sec.242
Turn the raw legal text into a practical explanation grounded in Coal Mining Safety and Health Regulation 2017.
### sec.242 Intake airways
At least 1 automatic methane detector must be located in each intake airway at the interface between—
a NERZ and ERZ1; and
2 NERZs.
the interface between subdivided parts of a NERZ
A detector located at an interface between a NERZ and ERZ1 must—
when the general body concentration of methane detected at the interface exceeds 0.25%—automatically activate a visible alarm; and
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—
the ERZ1 and NERZ; or
if the NERZ has been subdivided—the ERZ1 and the subdivided part of the NERZ adjacent to the ERZ1.
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.
A detector located at an interface between 2 NERZs must—
automatically activate a visible alarm when the general body concentration of methane detected at the interface exceeds 0.25%; and
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%.
The alarm mentioned in subsection (2) (a) or (4) (a) must be visible at the interface.
s 242 amd 2019 SL No. 250 s 8 ; 2020 SL No. 118 s 7
(sec.242-ssec.1) At least 1 automatic methane detector must be located in each intake airway at the interface between— a NERZ and ERZ1; and 2 NERZs. the interface between subdivided parts of a NERZ
(sec.242-ssec.2) A detector located at an interface between a NERZ and ERZ1 must— when the general body concentration of methane detected at the interface exceeds 0.25%—automatically activate a visible alarm; and 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— the ERZ1 and NERZ; or if the NERZ has been subdivided—the ERZ1 and the subdivided part of the NERZ adjacent to the ERZ1.
(sec.242-ssec.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.
(sec.242-ssec.4) A detector located at an interface between 2 NERZs must— automatically activate a visible alarm when the general body concentration of methane detected at the interface exceeds 0.25%; and 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%.
(sec.242-ssec.5) The alarm mentioned in subsection (2) (a) or (4) (a) must be visible at the interface.
- (a) a NERZ and ERZ1; and
- (b) 2 NERZs. Example of interface between 2 NERZs— the interface between subdivided parts of a NERZ
- (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.
- (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.
- (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.
- (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%.