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MAIN ROOF [1 record]
Record 1 - internal organization data 2016-02-26
Record 1, English
Record 1, Subject field(s)
- Underground Mining
Record 1, Main entry term, English
- main roof
1, record 1, English, main%20roof
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The rock above the immediate roof. 2, record 1, English, - main%20roof
Record number: 1, Textual support number: 1 CONT
There are two broad types of roof as far as support is concerned, the immediate roof above the coal and the main roof. Artificial support for mining purposes is only concerned with the immediate roof as nothing except large blocks of solid coal, or massive concrete, will support the main roof. ... Main roof is composed of strata above the immediate coal bed roof that forms the overburden to the surface. Frequently, the term is applied only to a massive, strong rock layer that does not break or bend until all of the coal is removed by pillaring or by longwall mining. 3, record 1, English, - main%20roof
Record number: 1, Textual support number: 1 OBS
Immediate roof: Lowest layer or layers of rock immediately above an underground opening. 2, record 1, English, - main%20roof
Record number: 1, Textual support number: 1 PHR
Main roof break. 4, record 1, English, - main%20roof
Record 1, French
Record 1, Domaine(s)
- Exploitation minière souterraine
Record 1, Main entry term, French
- toit supérieur
1, record 1, French, toit%20sup%C3%A9rieur
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- haut toit 2, record 1, French, haut%20toit
masculine noun
- toit principal 2, record 1, French, toit%20principal
masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
S'il s'agit d'une taille à foudroyage, le toit immédiat casse et s'effondre le long d'une ligne parallèle au front de taille à quelques mètres de celui-ci; les éboulis foisonnés remplissent le vide, de sorte que le toit supérieur, à quelques mètres au-dessus, repose sur ces éboulis, qui jouent le rôle d'un remblai, et les tasse progressivement [...] 3, record 1, French, - toit%20sup%C3%A9rieur
Record number: 1, Textual support number: 1 PHR
Cassure d'affaissement, cassure d'exploitation (du, au) toit. 2, record 1, French, - toit%20sup%C3%A9rieur
Record 1, Spanish
Record 1, Textual support, Spanish
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