TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

TOIT IMMEDIAT [3 records]

Record 1 2016-02-26

English

Subject field(s)
  • Underground Mining
DEF

The rock above the immediate roof.

CONT

There are two broad types of roof as far as support is concerned, the immediate roof above the coal and the main roof. Artificial support for mining purposes is only concerned with the immediate roof as nothing except large blocks of solid coal, or massive concrete, will support the main roof. ... Main roof is composed of strata above the immediate coal bed roof that forms the overburden to the surface. Frequently, the term is applied only to a massive, strong rock layer that does not break or bend until all of the coal is removed by pillaring or by longwall mining.

OBS

Immediate roof: Lowest layer or layers of rock immediately above an underground opening.

PHR

Main roof break.

French

Domaine(s)
  • Exploitation minière souterraine
CONT

S’il s’agit d’une taille à foudroyage, le toit immédiat casse et s’effondre le long d’une ligne parallèle au front de taille à quelques mètres de celui-ci; les éboulis foisonnés remplissent le vide, de sorte que le toit supérieur, à quelques mètres au-dessus, repose sur ces éboulis, qui jouent le rôle d’un remblai, et les tasse progressivement [...]

PHR

Cassure d’affaissement, cassure d’exploitation (du, au) toit.

Spanish

Save record 1

Record 2 2016-02-26

English

Subject field(s)
  • Underground Mining
DEF

Lowest layer or layers of rock immediately above an underground opening.

CONT

There are two broad types of roof as far as support is concerned, the immediate roof above the coal and the main roof. Artificial support for mining purposes is only concerned with the immediate roof as nothing except large blocks of solid coal, or massive concrete, will support the main roof. The immediate roof is generally a few feet thick but can vary from inches to 20 ft or more.

French

Domaine(s)
  • Exploitation minière souterraine
CONT

Les piliers abandonnés jouent un double rôle : soutènement et contrôle du toit. Ils doivent tout d’abord protéger pendant la phase de dépilage contre l'éboulement du toit immédiat, c'est-à-dire des terrains qui se trouvent immédiatement au-dessus du chantier.

Key term(s)
  • bas-toit

Spanish

Save record 2

Record 3 2016-02-26

English

Subject field(s)
  • Underground Mining
DEF

... the pinning together of the material adjacent to a mine opening by drilling a hole 5 to 6 feet deep and inserting a special bolt 1 to [1 3/4] in. in diameter.

OBS

The end inserted in the hole is equipped with a wedge or expansion shell that seizes the material at the bottom of the hole. A heavy washer or plate is placed over the exposed and threaded end of the bolt, and the nut is tightened to a unit of support.

Key term(s)
  • strata bolting

French

Domaine(s)
  • Exploitation minière souterraine
DEF

Méthode de soutènement spécial du toit [qui] consiste à introduire dans des trous de faible diamètre, forés dans la couronne d’une excavation, des tiges d’acier, ayant généralement de 1,5 à 2 m de long, appelées boulons, ou des broches de bois qui sont ancrées par un dispositif spécial au fond du trou, et qui maintiennent une plaque d’appui serrée par un écrou contre la couronne du chantier.

OBS

Ce boulonnage serre les unes contre les autres les différentes strates du toit immédiat [...]

Key term(s)
  • soutènement par boulon d’ancrage

Spanish

Save record 3

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