TERMIUM Plus®

From: Translation Bureau

On social media

Consult the Government of Canada’s terminology data bank.

ROOF PILLAR [8 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-02-26

English

Subject field(s)
  • Extraction Procedures - Various (Mining)
  • Blasting Work (Mining)
DEF

A system of mining in which the distinguishing feature is the winning of 50 percent or more of the coal or ore in the first working. The coal or ore is mined in rooms separated by narrow ribs or pillars. The coal or ore in the pillars is won by subsequent working, which may be likened to top slicing, in which the roof is caved in successive blocks. The first working in rooms is an advancing, and the winning of the rib(pillar) a retreating method. The rooms are driven parallel with one another, and the room faces may be extended parallel, at right angles, or at an angle to the dip.

OBS

barrier system: Term used in the North of England.

French

Domaine(s)
  • Procédés d'extraction divers (Exploit. minière)
  • Travail aux explosifs (Exploitation minière)
CONT

Exploitation par chambres et piliers. Dans une première phase, le traçage, on creuse dans l'épaisseur de la couche une série de galeries parallèles de 4 à 6 m de large; ce sont les chambres, entre lesquelles subsistent des massifs de charbon, percés par de courtes recoupes allant d'une chambre à l'autre afin de faciliter l'aérage et le déplacement du matériel; ce sont les piliers. La deuxième phase comporte l'exploitation en rabattant du charbon des piliers; c'est le dépilage, qui se fait par un court chantier dans chaque pilier; le foudroyage des vides produits par les chantiers de dépilage est la règle.

Key term(s)
  • chambres et piliers

Spanish

Campo(s) temático(s)
  • Distintos procedimientos de extracción (Explotación minera)
  • Trabajo con explosivos (Explotación minera)
Save record 1

Record 2 2016-02-26

English

Subject field(s)
  • Mining Dangers and Mine Safety
  • Underground Mining
DEF

The sudden failure of walls or pillars in a mine caused by the weight or pressure of the surrounding rocks, and accompanied by a violent release of energy.

CONT

Rock bursts. In areas of very deep mining, as additional weight is supported by the pillars on the coal face, stresses may so build up that the yield point is reached. If the coal pillars, the roof, or the floor are able to yield gradually, the effects of the stresses are relieved by floor heaving, or by pillar or roof failure. Where the coal or the associated rocks are particularly strong and depths are much above average, these stresses may be relieved by rock bursts, which are relatively violent outbursts of the coal into the rooms and entries. Frequently, a large volume of gas(usually methane) is suddenly released during a rock burst in a coal mine.

OBS

for "coal burst" : Rock bursts and "coal bursts" in coal mines are generally designated by the term "bumps" or "bounces". A large proportion of these "bumps" or "bounces" are actually "coal bursts" due to fracturing of pillars and remnants and need not involve any fracturing of roof or floor rock.

OBS

for "air blast" : In former years rock bursts were sometimes referred to as "air blasts". This name originated from the fact that large quantities of rock loosened by some of the larger rock bursts displaced quantities of air, with the result that a blast of air passed through the mine workings.

French

Domaine(s)
  • Exploitation minière (dangers et sécurité)
  • Exploitation minière souterraine
DEF

[...] dislocation des piliers de charbon soutenant le toit, avec projections de charbon et parfois soulèvement du mur, plus tendre, jusqu'à venir toucher le toit.

OBS

[Le coup de toit peut] mettre en danger l'outillage et le personnel.

Spanish

Campo(s) temático(s)
  • Explotación minera (peligros y seguridad)
  • Explotación minera subterránea
Save record 2

Record 3 2015-10-14

English

Subject field(s)
  • Petrography
CONT

OPG [Ontario Power Generation] indicated that changes in ground stress, induced by surface glacial loads through the earliest two glacial ice ages during the initial 150, 000 year period following decommissioning, would not affect pillar stability. Beyond 300, 000 years after decommissioning, OPG expected that the effects of several ice ages would cause significant rock failure and roof collapse within repository rooms.

French

Domaine(s)
  • Pétrographie

Spanish

Save record 3

Record 4 2008-02-13

English

Subject field(s)
  • Bodywork and Framework (Motor Vehicles)
CONT

The rear roof pillar is precisely angled to provide the utmost privacy to rear seat passengers while stil affording them a panoramic view out.

OBS

roof support: term extracted from the "Motor Vehicles = Véhicules automobiles" glossary with the permission of the United Nations Office at Geneva.

French

Domaine(s)
  • Carrosserie, caisse et châssis (Véhicules automobiles)
CONT

Dans le cas présent, la cage en elle-même ne pèse que 75 kg et les panneaux de carrosserie latéraux, allant du montant de toit avant jusqu'au panneau arrière du coffre, sont constitués d'une tôle d'aluminium emboutie d'un seul tenant.

OBS

montant de toit; pied de toit : termes tirés du lexique «Motor Vehicles = Véhicules automobiles» avec l'autorisation de l'Office des Nations Unies à Genève.

Spanish

Save record 4

Record 5 1998-08-04

English

Subject field(s)
  • Mining Operations
  • Mine Passages
DEF

A pillar, constructed from loose stones and dirt, built in the waste area or roadside to support the roof.

PHR

Pack line.

French

Domaine(s)
  • Exploitation minière
  • Galeries et soles (Mines)
PHR

Arête de remblai.

Key term(s)
  • murette de remblai

Spanish

Save record 5

Record 6 1998-03-24

English

Subject field(s)
  • Geological Research and Exploration
  • Mining Operations
DEF

In underground mining, the weight of rock above an excavation which has been transferred to the adjoining walls.

CONT

front abutment pressure

CONT

Faulty pillar recovery methods and removal of more coal than permitted by the plan's design allowed lateral or abutment pressures from the gob to overcome the mine roof at the location of the continuous mining machine while mining was being conducted.

CONT

The closer the abutment pressures are to the longwall face, the greater the spalling.

French

Domaine(s)
  • Recherches et prospections géologiques
  • Exploitation minière
PHR

charge de culée avant; charge de culée arrière

Spanish

Save record 6

Record 7 1993-05-17

English

Subject field(s)
  • Motor Vehicles and Bicycles
  • Bodywork and Framework (Motor Vehicles)
CONT

Other refinements contributing to the low drag factor include the rear roof pillar and window header shapes, window glass shape and position, flush side glass, the plan-view tapered body, the large radii on front surfaces, the outside mirror housing, engine housing and cooling component configuration, and the underbody configuration including muffler, rear suspension components, fuel tank, and exhaust system.

French

Domaine(s)
  • Véhicules automobiles et bicyclettes
  • Carrosserie, caisse et châssis (Véhicules automobiles)

Spanish

Save record 7

Record 8 1993-05-17

English

Subject field(s)
  • Motor Vehicles and Bicycles
  • Bodywork and Framework (Motor Vehicles)
CONT

Other refinements contributing to the low drag factor include the rear roof pillar and window header shapes, window glass shape and position, flush side glass, the plan-view tapered body, the large radii on front surfaces, the outside mirror housing, engine housing and cooling component configuration, and the underbody configuration including muffler, rear suspension components, fuel tank, and exhaust system.

French

Domaine(s)
  • Véhicules automobiles et bicyclettes
  • Carrosserie, caisse et châssis (Véhicules automobiles)

Spanish

Save record 8

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Display options

Change the order of display of the official languages of Canada
Option to display the non-official languages (Spanish or Portuguese)
Display definitions, contexts, etc., on records

Features

GCtranslate (available on the Government of Canada network only)

Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: