Shaft Bottom

Shaft Bottom

 

a complex of underground mine workings excavated near a mine shaft. The shaft bottom consists of extensive main arteries that provide a transport link between the shafts and the main roadways and airways of the mine, and chambers used for various production purposes. The shaft bottom workings are used for receiving and processing loads entering the airway or haulage levels from the mine or from the surface. They are also used for the movement of personnel, the ventilation of mine workings, and the conveyance of loads and miners to the working faces. Shaft bottoms may be circular, looped, or of the shuttle type, depending on how they abut on the main roadways and on how the transport system is arranged.

REFERENCE

Al’bom okolostvol’nykh dvorov i stvolov shakht. Moscow, 1966.
References in periodicals archive ?
Tenders are invited for Permanent dewatering system for adit-to pressure shaft bottom (apsb)through mat in ph for ntpc-tvhpp
Holding the pilot and the case firmly together with one hand, guide the cutter into the flash hole, and then push down and rotate the handle until you feel the cutter shaft bottom out.
5, a 55-year-old contract miner received fatal injuries when he was pinned between a pneumatically powered air lock equipment door and the concrete rib barrier located near the shaft bottom.
The orebodies Vale is targeting are close to the South Shaft and descend to the 5,200-foot level, requiring ramp infrastructure below shaft bottom. Without a refurbished shaft, ore ould have be trucked nine kilometres to the North Shaft.
Turquoise Hill announced that Oyu Tolgoi has completed the sinking of Shaft 2, including reaching final depth, shaft bottom mass excavation and concrete floor installation, marking an early milestone in the development progress of Hugo North Lift 1.
They proposed that the "cross passage parallel shaft construction" method was better adapted to the good geological condition under the shaft bottom and discussed the superiority of the method.
The modular structure consists of an entrance cone, shaft ring, and shaft bottom, frequently adding up to an overall height of several meters.
The beginning of the blind shaft bottom was always taken as the first measured horizon.
And, some cite a 2000 Formal Interpretation (#2/710/00) of a very similar, but now-obsolete, 1999 BOCA Code clause not allowing a rated damper on the horizontal underside of a shaft bottom.
When the hot smoke reaches the shaft bottom in the stage of flowing horizontally, the stack effect takes place, and then smoke will be exhausted from the shaft.
This was the time when the miners, on reaching the shaft bottom at the start of a shift, would sit in a circle swapping yarns and chatting before starting work.
He would use various bells to signal to the hauler man to take the tubs to the shaft bottom.