Miscellaneous Section 3 Flashcards
where could methane be found on a surface mine? name 3 areas
freshly exposed coal, seam gas, bore holes, blasting
where could nitrogen dioxide be found on a surface mine?
blast fume
diesel exhaust
where could sulphur dioxide be found on a mine site? name 2 areas
spon com in coal containing sulphur
burning rubber
diesel exhaust
what are the 5 factors that must occur simultaneously for an explosion to occur?
1) oxygen
2)fuel
3) heat
4) suspension
5) confinement
where can carbon monoxide be found on a surface mine? name 2 areas
diesel exhaust, shotfiring, fires, spon com
what 2 gases can be found in confined spaces at the CHPP?
hydrogen sulphide H2S
carbon monoxide CO
what gases can be found when an inversion layer in-pit occurs?
all seam gases
what gases can be found when a product cylinder leaks?
whatever is inside cylinder e.g lpg/acetylene
what risk control method is used at your mine when responding to the detection of flammable &/or toxic gases?
gas tarp
when coal heats, gases appear at characteristic. name 6 gases and the order in which they appear
1) carbon dioxide CO2
2) carbon monoxide CO
3) methane CH4
4) hydrogen H2
5) ethane
6) hydrocarbons
convert 400ppm to a %
0.04%
what must occur for a person working more than the stated hours for applicable long term exposure limits?
the TWA Standard will need to be adjusted to the recognised standard
what is the applicable long term exposure limit concentrations for various atmospheric contaminants. define long term exposure for hours in a day and hours in a week?
8h/40h/week
what is the maximum general body concentration of carbon dioxide to which a CMW can be exposed if a continual personal monitoring method is usedto calculate the time weighted average TWA concentration of carbon dioxide to which the person is exposed?
TWA = 1.25%
STEL = 3%
what should be recorded whe taking gas readings in the excavation/workplace. name 6
persons name
gas type
location
time
date
weather conditions
