air shaft | air pit | ventilation shaft

in connection with ventilation,we speak of the downcast and upcast shafts

main ventilating current | main ventilation | through ventilation

duct | ventilation duct

ventilation circuit

down hill ventilation

brattice builder [ brattice man | braddish man | braddisher ]

driven well [ drivewell | tube well | tube-well | Abyssinian well | abyssinian well ]

five-spot pattern

Accident caused by mine pit-head gear

141 (1) No welding, soldering, brazing or other open-flame or heating work shall be carried out underground or at a location above ground that is within 30 m of a shaft or airway unless

(48) As regards costs for the abandonment of the La Prohida subsector of the Sorriba Group, the information in the document from González y Díez S.A. coincides with that in the report by independent experts and is justified on the basis of the following indents of the Annex to Decision No 3632/93/ECSC: indent (f) for ventilation shafts, recovery of a crossing and future costs, also partly attributable to indents (l) and (g); indent (k) for the abandonment of the 1030 m at level 3 and the residual value of the remaining galleries of the La Prohida subsector; indents (f) and (g) for the restoration work at La Prohida.

(83) The aid amounting to EUR 602146.29 (100188 13 pesetas) was intended for the creation of shafts and other work to provide ventilation for the "Tres Hermanas" sector of the Sorriba group.