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SPLIT RING LAYOUT [1 record]
Record 1 - internal organization data 1989-03-14
Record 1, English
Record 1, Subject field(s)
- Blasting Work (Mining)
Record 1, Main entry term, English
- split ring layout 1, record 1, English, split%20ring%20layout
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
... split-ring layout. The first ring is drilled as a full ring with standard burden so that the crews will not have to work too close to the open face. The first split-ring is then drilled, with half the normal burden and half the number of holes. This is followed by a second split-ring drilled at half normal burden with the holes staggered between those of the previous split-ring. Two more such split-rings are drilled and ring 6 is drilled as a full ring with normal burden and toe spacing in order that a cleanly sheared face will be left. 1, record 1, English, - split%20ring%20layout
Record 1, French
Record 1, Domaine(s)
- Travail aux explosifs (Exploitation minière)
Record 1, Main entry term, French
- disposition d'éventails successifs en quinconce
1, record 1, French, disposition%20d%27%C3%A9ventails%20successifs%20en%20quinconce
feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
(...) disposition d'éventails successifs en quinconce. Afin d'éviter que les mineurs soient trop près du front de taille, le premier éventail est foré à l'épaisseur normale et comporte tous les rayons. Le prochain éventail est foré à la moitié de l'épaisseur normale et ne comporte que la moitié du nombre de trous d'un éventail complet. L'éventail suivant est foré comme le précédent, mais les trous sont disposés en quinconce. Suivent encore deux autres éventails en quinconce et enfin l'éventail No 6 est de nouveau foré au complet aux dimensions normales afin de rétablir un front de taille uniforme. 1, record 1, French, - disposition%20d%27%C3%A9ventails%20successifs%20en%20quinconce
Record 1, Spanish
Record 1, Textual support, Spanish
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