TERMIUM Plus®

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PROCEDE TIR PERIMETRIQUE [1 record]

Record 1 2008-10-29

English

Subject field(s)
  • Blasting Work (Mining)
DEF

A method of blasting in tunnels, drifts, and raises, designed to minimize overbreak and leave clean-cut solid walls.

CONT

Perimeter blasting ... consists of drilling the outside row of holes with a predetermined burden/spacing ratio, loading each hole with a very light continuous charge, then firing them simultaneously so that the rock is cleanly sheared from one hole to the next.

French

Domaine(s)
  • Travail aux explosifs (Exploitation minière)
DEF

Tir de précision effectué en bord de fosse, minimisant l'effet arrière.

CONT

Tir périmétrique. Ce procédé fut conçu pour réduire au minimum les hors profils et mieux régler les toits et murs des souterrains. Il s'agit de percer les trous de contour à intervalles rapprochés, les charger légèrement et les tirer simultanément pour arracher le roc à net d'un trou à l'autre.

OBS

[Dans ce procédé de sautage aux explosifs,] l'attention est portée essentiellement sur la maille, la répartition des charges, l'organisation de l'amorçage.

Spanish

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