Vertical ventilation hole definition

Vertical ventilation hole means any hole drilled from the surface to the coal seam used only for the safety purpose of removing gas from the underlying coal seam and the adjacent strata, thus, removing the gas that would normally be in the mine ventilation system.
View Source
Vertical ventilation hole means any hole drilled from the surface to the coal seam used
View Source
Vertical ventilation hole means any hole drilled from the surface to the coal seam used only for the safety purpose of removing gas from the underlying coal seam and the adjacent
View Source

Related to Vertical ventilation hole

  • Cheating means intentionally to misrepresent the source, nature, or other conditions of academic work so as to accrue undeserved credit, or to cooperate with someone else in such misrepresentation. Such misrepresentations may, but need not necessarily, involve the work of others.

  • Incineration means an engineered process involving burning or combustion of solid waste to thermally degrade waste materials at high temperatures;

  • Ballast water means water with its suspended matter taken on board a ship to control trim, list, draught, stability or stresses of the ship.

  • Plumbing means plumbing as defined in Section 1(1) of the Act.

  • Conditioning means drying, cleaning, scarifying, and other operations which could change the purity or germination of the seed and require the seed lot to be retested to determine the label information.