| dbo:abstract
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- Der Firstenbau ist eine Abbaumethode, die im Bergbau bei steil nach oben gerichteten Lagerstätten angewendet wird. Der Firstenbau ist für steil stehende Steinkohlenflöze und Gangerzlagerstätten eine wichtige Abbaumethode. Der Firstenbau wird so bezeichnet, weil bei dieser Abbaumethode der Abbau von der Firste der Grundstrecke ausgehend nach oben vorrückt. Er zählt zu den Abbauverfahren mit Versatz. (de)
- Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping is used when the country rock is sufficiently strong not to collapse into the stope, although in most cases artificial support is also provided. The earliest forms of stoping were conducted with hand tools or by fire-setting; later gunpowder was introduced. From the 19th century onward, various other explosives, power-tools, and machines came into use. As mining progresses the stope is often backfilled with tailings, or when needed for strength, a mixture of tailings and cement. In old mines, stopes frequently collapse at a later time, leaving craters at the surface. They are an unexpected danger when records of underground mining have been lost with the passage of time. Stoping is considered "productive work", and is contrasted with "deadwork", the work required merely to access the mineral deposit, such as sinking shafts and winzes, carving adits, tunnels, and levels, and establishing ventilation and transportation. (en)
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| rdfs:comment
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- Der Firstenbau ist eine Abbaumethode, die im Bergbau bei steil nach oben gerichteten Lagerstätten angewendet wird. Der Firstenbau ist für steil stehende Steinkohlenflöze und Gangerzlagerstätten eine wichtige Abbaumethode. Der Firstenbau wird so bezeichnet, weil bei dieser Abbaumethode der Abbau von der Firste der Grundstrecke ausgehend nach oben vorrückt. Er zählt zu den Abbauverfahren mit Versatz. (de)
- Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping is used when the country rock is sufficiently strong not to collapse into the stope, although in most cases artificial support is also provided. Stoping is considered "productive work", and is contrasted with "deadwork", the work required merely to access the mineral deposit, such as sinking shafts and winzes, carving adits, tunnels, and levels, and establishing ventilation and transportation. (en)
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