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A '''cave-in''' is a [[wiktionary:Collapse|collapse]] of a geologic formation, mine or structure which may occur during [[mining]] or [[tunnel|tunneling]]. Geologic structures prone to spontaneous cave-ins include [[alvar]], [[tsingy]] and other limestone formations, but can also include [[lava tube]]s and a variety of other subsurface rock formations. [[Glacier cave]]s and other ice formations are very prone to collapse from exposure to warm temperatures or running water. |
A '''cave-in''' is a [[wiktionary:Collapse|collapse]] of a geologic formation, mine or structure which may occur during [[mining]] or [[tunnel|tunneling]]. Geologic structures prone to spontaneous cave-ins include [[alvar]], [[tsingy]] and other limestone formations, but can also include [[lava tube]]s and a variety of other subsurface rock formations. [[Glacier cave]]s and other ice formations are very prone to collapse from exposure to warm temperatures or running water. |
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In mining, the term '''roof fall'''<ref>{{cite web |url=http://www.coaleducation.org/glossary.htm#R |title=Glossary of Mining Terms |website=Kentucky Coal Education}}</ref> is used to refer to a many types of collapses, ranging from the fall of a single flake of [[shale]] to collapses that form [[sink hole]]s that reach to the surface. However, roof falls in mining are not all accidental. In [[longwall mining]] and [[retreat mining]], miners systematically remove all support from under large areas of the mine roof, allowing it to settle just beyond the work area. The goal in such mining methods is not to prevent roof fall and the ensuing surface [[subsidence]], but rather to control it. |
In mining, the term '''roof fall'''<ref>{{cite web |url=http://www.coaleducation.org/glossary.htm#R |title=Glossary of Mining Terms |website=Kentucky Coal Education}}</ref> is used to refer to a many types of collapses, ranging from the fall of a single flake of [[shale]] to collapses that form [[sink hole]]s that reach to the surface. However, roof falls in mining are not all accidental. In [[longwall mining]] and [[retreat mining]], miners systematically remove all support from under large areas of the mine roof, allowing it to settle just beyond the work area. The goal in such mining methods is not to prevent roof fall and the ensuing surface [[subsidence]], but rather to control it.roukes |
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==Geological formations== |
==Geological formations== |
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Acave-in is a collapse of a geologic formation, mine or structure which may occur during miningortunneling. Geologic structures prone to spontaneous cave-ins include alvar, tsingy and other limestone formations, but can also include lava tubes and a variety of other subsurface rock formations. Glacier caves and other ice formations are very prone to collapse from exposure to warm temperatures or running water.
In mining, the term roof fall[1] is used to refer to a many types of collapses, ranging from the fall of a single flake of shale to collapses that form sink holes that reach to the surface. However, roof falls in mining are not all accidental. In longwall mining and retreat mining, miners systematically remove all support from under large areas of the mine roof, allowing it to settle just beyond the work area. The goal in such mining methods is not to prevent roof fall and the ensuing surface subsidence, but rather to control it.roukes
The dictionary definition of cave in at Wiktionary
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Cave topics
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| Main topics |
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| Types and formation processes |
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| Speleothems and Speleogens (Cave formations) |
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| Dwellings |
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| Popular culture |
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| Incidents |
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