Gunnies
Space left in a mine after the extraction of a vertical lode / From Wikipedia, the free encyclopedia
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"Gunnis" redirects here. For the biographical dictionary edited by Rupert Gunnis, see Dictionary of British Sculptors 1660–1851.
A gunnies, gunnis, or gunniss is the space left in a mine after the extraction by stoping of a vertical or near vertical ore-bearing lode.[1][2] The term is also used when this space breaks the surface of the ground, but it can then be known as a coffin or goffen.[3] It can also be used to describe the deep trenches that were dug by early miners in following the ore-bearing lode downwards from the surface – in this case they are often called open-works; their existence can provide the earliest evidence of mining in an area.[4] William Pryce, writing in 1778, also used the term as a measure of width, a single gunnies being equal to three feet.[5]