TERMIUM Plus®

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

PRESSURE ARCH [1 record]

Record 1 1999-05-11

English

Subject field(s)
  • Mining Operations
CONT

The driving of a narrow roadway results in the development of a pressure arch over the excavation. The strata within the arch bend slightly and cease to support the overlying beds, and the load is transferred to the solid coal or rock along the sides. The wider the roadway, the greater is the span of the arch and its height at the crown. A similar but larger pressure arch is formed across a longwall face, with one leg resting on the solid coal and the other on the solid pack behind the coal face.

PHR

Roadway pressure arch, roof pressure arch, span of pressure arch, width of pressure arch.

Key term(s)
  • floor pressure arch

French

Domaine(s)
  • Exploitation minière
PHR

Voûte de pression au-dessus d'une galerie.

PHR

Largeur d'une voûte de pression, portée d'une voûte de pression.

Key term(s)
  • voûte de toit

Spanish

Campo(s) temático(s)
  • Explotación minera
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