Every occupation has a language that is unique to itself.
Here are some of the words and phrases that are, or were, used in the mining industry in the Rhondda Valleys. A gallery driven from the open air into a mine, more particularly the gallery that drains a mine. The atmosphere produced by an explosion of gas in a mine, consisting of carbonic acid, nitrogen and steam. AIR BOX Wooden tubes for conveying fresh air to workings. The surface land surrounding the mouth of a shaft.