Un fontis est un effondrement du sol en surface, causé par la déliquescence souterraine progressive des terrains porteurs.

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  • Un fontis est un effondrement du sol en surface, causé par la déliquescence souterraine progressive des terrains porteurs. Dans une cavité enfouie, naturelle ou anthropique (c'est-à-dire creusée par l'homme : carrière, mine, tunnel, etc.), la pression des terrains de recouvrement et/ou la circulation de fluides peuvent provoquer la détérioration du ciel (c'est-à-dire du plafond) et des piliers de soutènement, ce qui peut occasionner à terme deux types d'effondrements en surface : des effondrements localisés (les fontis au sens classique) ; des effondrements généralisés.
  • A cave-in is a collapse of a geologic formation, mine or structure which may occur during mining or tunneling. 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 is used to refer to a range 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.
  • 낙반(落盤)은 터널 갱내에서 지질불량 등으로 인해 천장부가 붕괴하여 떨어지는 것이다.
  • 落盤(らくばん、落磐)とは、坑道や地下構造物の天井や側壁が崩壊すること。原因は、支保工の施工性の問題、構造の老朽化、地質の脆弱性に起因するもの、安全対策への理解不足、ガス爆発などさまざま。坑道内で掘削中や構造物建設の最中に発生した場合、多くの作業員等が巻き込まれて深刻な労働災害となる場合が多い。
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  • Un fontis est un effondrement du sol en surface, causé par la déliquescence souterraine progressive des terrains porteurs.
  • 낙반(落盤)은 터널 갱내에서 지질불량 등으로 인해 천장부가 붕괴하여 떨어지는 것이다.
  • 落盤(らくばん、落磐)とは、坑道や地下構造物の天井や側壁が崩壊すること。原因は、支保工の施工性の問題、構造の老朽化、地質の脆弱性に起因するもの、安全対策への理解不足、ガス爆発などさまざま。坑道内で掘削中や構造物建設の最中に発生した場合、多くの作業員等が巻き込まれて深刻な労働災害となる場合が多い。
  • A cave-in is a collapse of a geologic formation, mine or structure which may occur during mining or tunneling. 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.
rdfs:label
  • Fontis
  • Cave-in
  • 落盤
  • 낙반
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