sec.250AAction to be taken if automatic methane detector non-operational in roof fall

### sec.250A Action to be taken if automatic methane detector non-operational in roof fall An underground mine must have a standard operating procedure for taking action if— a roof fall causes an automatic methane detector mentioned in section 243A to fail in service; and the detector cannot be immediately replaced or repaired. The procedure must provide that— the automatic methane detector or the cable for the detector must be replaced or repaired as soon as practicable; and the armoured face conveyor or the longwall shearer may be operated— only to clear the roof fall or recover the cable for the detector; and only while the conditions mentioned in subsection (3) apply. For subsection (2) (b) (ii) , the conditions are— the ERZ controller uses a portable methane detector to continuously monitor the general body concentration of methane in the area of the roof fall; and the general body concentration of methane in the area of the roof fall is less than 1.25%; and the general body concentration of methane at the longwall face and in the longwall return airway is less than 2%. s 250A ins 2020 SL No. 118 s 12 (sec.250A-ssec.1) An underground mine must have a standard operating procedure for taking action if— a roof fall causes an automatic methane detector mentioned in section 243A to fail in service; and the detector cannot be immediately replaced or repaired. (sec.250A-ssec.2) The procedure must provide that— the automatic methane detector or the cable for the detector must be replaced or repaired as soon as practicable; and the armoured face conveyor or the longwall shearer may be operated— only to clear the roof fall or recover the cable for the detector; and only while the conditions mentioned in subsection (3) apply. (sec.250A-ssec.3) For subsection (2) (b) (ii) , the conditions are— the ERZ controller uses a portable methane detector to continuously monitor the general body concentration of methane in the area of the roof fall; and the general body concentration of methane in the area of the roof fall is less than 1.25%; and the general body concentration of methane at the longwall face and in the longwall return airway is less than 2%. - (a) a roof fall causes an automatic methane detector mentioned in section 243A to fail in service; and - (b) the detector cannot be immediately replaced or repaired. - (a) the automatic methane detector or the cable for the detector must be replaced or repaired as soon as practicable; and - (b) the armoured face conveyor or the longwall shearer may be operated— (i) only to clear the roof fall or recover the cable for the detector; and (ii) only while the conditions mentioned in subsection (3) apply. - (i) only to clear the roof fall or recover the cable for the detector; and - (ii) only while the conditions mentioned in subsection (3) apply. - (i) only to clear the roof fall or recover the cable for the detector; and - (ii) only while the conditions mentioned in subsection (3) apply. - (a) the ERZ controller uses a portable methane detector to continuously monitor the general body concentration of methane in the area of the roof fall; and - (b) the general body concentration of methane in the area of the roof fall is less than 1.25%; and - (c) the general body concentration of methane at the longwall face and in the longwall return airway is less than 2%.