Cave-in

A cave-in is a collapse of a geologic formation, mine or structure which may occur during mining, tunneling, or steep-walled excavation such as trenching.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 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.The goal in such mining methods is not to prevent roof fall and the ensuing surface subsidence, but rather to control it.
Illustration of mine collapse aftermath, from 1878
Cave Inminingtunnelingexcavationtrenchingtsingylava tubesGlacier cavessink holeslongwall miningretreat miningsubsidenceStora AlvaretÖlandSwedenMadagascar dry deciduous forestsGlossary of caving and speleologyBiospeleologyCave conservationCave paintingCave surveyCavingDivingEquipmentStygofaunaTroglofaunaSpeleogenesisSpeleologyAnchihaline caveBreathing caveCenoteEstavelle/InversacGlacier caveIce caveKarst springLava caveLey tunnelExplorationPit caveSalt caveSea caveSolutional caveShow caveSinkholeSpringSuffosionTalus caveWaterfallSpeleothemsSpeleogensAnthoditeBoxworkCalcite raftsCave pearlCave popcornDogtooth sparFlowstoneFrostworkHelictiteMoonmilkRimstoneShelfstoneSnottiteSoda strawSpeleoseismiteStalactiteStalagmiteStalagnateCave dwellerCave-dwelling JewsCave monasteryKome CavesNok and Mamproug Cave DwellingsYaodongDiving into the UnknownCave of Forgotten DreamsThe Underground EigerList of UK caving fatalitiesAlpazat cave rescueRiesending cave rescueTham Luang cave rescue