17---Friday---Gas Levels of Machinery From Coal Mines safety and Health regulations 2001---updated 1st Feb 2016

Question 1

What are the Trip and alarm levels for

• ERZ NERZ Boundry
• NERZ NERZ Boundary

as detailed in section 242 of the regulations?

Answer 1

• Regulations
• • ERZ/NERZ
• Alarm 0.25%

Trip 0.5%

(s242)

• NERZ/NERZ
• Alarm 0.25%

Trip 0.5%

(s242)

Question 2

What are the Trip and alarm levels for an Auxillary fan?

Answer 2

Regulations

Auxiliary fan (s231)

No alarm in Regulations

Trip 2%

Cooks SOP

Alarm 1%

Trip 1.25%

Question 3

What are the Trip and alarm levels for an Shearer?

Answer 3

Regulations

Shearer (s234 )

Alarm 1%

Shearer drum / Heads trip 1.25%

General body 2%

Cooks SOP

Alarm 1%

Shearer drum / Heads Trip 1.25%

General body 2%

Question 4

What are the Trip and alarm levels for a Miner?

Answer 4

Miner (s233)

Regulations

Alarm 1%

Heads Trip 2%

General body 2%

Cooks SOP

Alarm 1%

Heads Trip 2%

General body 2%

Question 5

What are the Trip and alarm levels for a Bolter

Answer 5

Bolter (s235)

Regulations

Alarm 1%

General body 2%

Cooks SOP

Alarm 1%

General body 2%

Question 6

What are the Trip and alarm levels for MG

Answer 6

MG (s244)

Regulations

NO Alarm

General body 2%

Cooks SOP

Alarm 1%

Trip 2%

Question 7

What are the Trip and alarm levels for TG

Answer 7

TG, (s244)

Regulations

NO Alarm

General body 2%

Cooks SOP

Alarm 1%

General body 2%

Question 8

What are the Trip and alarm levels for LHDs

Answer 8

LHDs (s246)

Regulations

Alarm 1%

General body 1.25%

Cooks SOP

Alarm 1%

General body 1.25%

Question 9

What are the Trip and alarm levels for the main fan

Answer 9

Main Fan (s232)

Requires at least 1 CH4 detector

Alarms at set level as stated in sites PHMP, L-1%, H-1.25%)

Fan does not Trip

Question 10

What are the Trip and alarm levels for - 4 ways (s243)

Answer 10

All Trolex sensors-Gas Sensor Range Settings

CH4–0>5.00%

A1-1%

A2-1.25%

CO– 0>50.00ppm

A1-6ppm

T2-8ppm

CO2– 0>2.00%

A1-1%

A2-1.25%

O2– 0>25.00%

A1-20.5%

A2-19%

Question 11

What are the Trip and alarm levels for CO sensors?

Answer 11

CO levels are not prescribed by regs and are subject to change with the ventilation (set by L/make)

Question 12

What should a CO sensor do if it alarms on a belt?

Answer 12

CO levels are not prescribed by regs and are subject to change with the ventilation (set by L/make)

Question 13

What does a CH4 sensor also do what with repect to a belt?

Answer 13

CH4 sensors have a dual purpose of tripping the belt at 1% Not at cook Though!