Oxygen

• GENERAL PROPERTY:-

1. It is colorless, tasteless,.
2. Specific Gravity = 1.1047;which is heavier then that of air.
3. Critical Temp. = -119°C
4. Oxygen can cause dangerous condition in mine only by its absence.
5. 100 volume of water at room temp. consume 3 volume of oxygen.
6. In any mines,oxygen should be 19% or more(for India) & 19.5% or more (for USA)

• USES OF OXYGEN IN MINES:-

1. Breathing by person.
2. Slow oxidation of coal or other carbonaceous material.
3. Burning of F.S.L. (Flame Safety Lamp) and for non-coal mine by acetylene lamp.
4. Decay of material, timber by fungus growth.

Deficiency of Oxygen
O2 Conc.	Effects
19%	Flame height on F.S.L gets reduced by 50%
17%	Noticeable increase in rate of breathing
15%	Spinning sensation in head & increased heartbeat
13-9%	Distortion, fainting, vomiting sensation, headache, blue lips and coma may occur
7%	Coma, Convulsions (Violent uncontrollable contraction of muscles) or death may occur
Below 6%	The condition may eventually lead to death.