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DIAMOND DRILL HOLE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2005-02-14

English

Subject field(s)
  • Deep Drilling (Mines)
  • Underground Mining
  • Compartment - Canadian Nuclear Safety Commission
CONT

Every licensee shall establish, operate and maintain a mechanical ventilation system designed for and suitable to the ventilation of all underground work places at his excavation site or mine and shall, with respect to that ventilation system ... reduce the amount of radon and thoron contamination entering the air stream from the diamond drill holes and drainage holes.

French

Domaine(s)
  • Sondage profond (Mines)
  • Exploitation minière souterraine
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Le titulaire de permis établit, fait fonctionner et maintient un système mécanique de ventilation approprié conçu pour tous les lieux de travail souterrains du site d'excavation ou de la mine et, en ce qui concerne ce système d'aérage : [...] réduit, si possible, la quantité de radon et de thoron qui contamine l'air, venant des trous de forage au diamant et des puits de drainage.

Spanish

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Record 2 1999-10-21

English

Subject field(s)
  • Blasting Work (Mining)
  • Construction of Boreholes (Mining)
CONT

"Bulling" or chambering of holes. The bottom of a small diameter borehole(such as diamond drill or wagon drill hole) may be enlarged by lighting and dropping a gelatine dynamite safety fuse primer into the hole. The burden is of course, too great for this small charge to break the ground. Its effect is to pulverize the rock in the vicinity and to expel it from the mouth of the hole in the form of dust. Meanwhile, the bottom of the hole has been increased in diameter in the form of a bulbous-shaped chamber, which will then accommodate a larger quantity of explosive. Care should be taken to allow the bottom of the hole to cool down before adding further explosives. The operation is variously called "bulling" or "chambering" or "springing". The method has been used chiefly in quarry work on bench holes.

French

Domaine(s)
  • Travail aux explosifs (Exploitation minière)
  • Aménagement du trou de sondage (Mines)
CONT

Le "pochage" consiste à faire exploser au fond d'un trou, en les renouvelant plusieurs fois, de petites charges d'explosifs. On a parfois recours à ce procédé dans les terrassements de rocher ou dans les carrières pour élargir à sa base un trou de mine de petit diamètre, afin d'y concentrer une plus forte charge d'explosif.

Spanish

Save record 2

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