Mine Gases and Safety

Flashcards based on lecture notes about mine gases and related safety information.

__ is a result of combustion.

A result of combustion consisting of tiny particles of solid and liquid matter suspended in the air.

The particles in smoke are usually __.

Soot or carbon, and tar-like substances such as hydrocarbons.

Why is smoke dangerous to inhale? Because __.

It contains carbon monoxide and other toxic or asphyxiating gases produced by fires.

The presence of smoke __.

Limits visibility, adding an extra element of difficulty to rescue or recovery operations.

Rock-strata gases are largely __.

Nitrogen and carbon dioxide.

The effect of rock gas is __.

To produce an oxygen-deficient atmosphere.

Damps are __.

Mixtures of gases.

Whitedamp is a mixture of __.

Carbon monoxide and air.

Stinkdamp is a mixture of __.

Hydrogen sulfide and air.

Why is Stinkdamp dangerous? Because __.

It is highly toxic and in certain concentrations it can be explosive.

Afterdamp is a mixture of __.

Carbon monoxide, carbon dioxide, methane, oxygen, nitrogen, and hydrogen.

Blackdamp is a mixture of __.

Carbon dioxide, nitrogen, and air.

Firedamp is a mixture of__.

Methane and air that will burn or explode when ignited.

Smoke is defined as __.

Tiny particles of solid and liquid matter suspended in air.

Solubility is the __.

Ability to dissolve in water.

Specific gravity is __.

The weight of a gas compared to an equal volume of air under the same temperature and pressure.

TLV (Threshold Limit Value) refers to __.

Average concentrations of gases to which workers can be exposed over an 8-hour daily period.

Asphyxiate means __.

To suffocate or choke.

Atmospheric pressure is __.

Force exerted by air.

Casing is defined as __.

Piping used to support sides of a borehole and to prevent entry of loose rock, gas, or liquid.

Combustible means __.

Capable of burning; flammable.

A contaminant is __.

Something which fouls or impurifies.

Explosive range is __.

The range of concentrations within which a gas will explode if ignited.

Ignite means __.

To set on fire.

Radon daughters are particularly dangerous because __.

Radon daughters adhere to respirable dust, and can be inhaled with the dust.