sump(redirected from sumps)
Also found in: Dictionary, Thesaurus.
in mining, an underground working for the collection of surface and subterranean water so that it may be pumped away. The size of the sump is based on the amount of inflow during a period of ten to 12 hours with all drainage pumps shut down. Under emergency flow conditions in a mine, use is made of the additional capacity represented by the workings lying adjacent to the sump and below the pump chamber. The sump is divided by a cofferdam into two sections; when one is in operation, the other is drained.
As places where water accumulates during drainage, sumps are used in mines, subway tunnels, quarries, and elsewhere.
REFERENCEBurovzryvnye raboty, pogruzka, kreplenie, rudnichnyi ventiliatsiia i vodootliv. Moscow, 1964.
V. A. POLUIANOV
(1) A storage vessel for collecting water that is placed in rock. Where deposits are worked by hydraulic mining, the hydraulic fluid is collected in a sump, for intake and pumping by a soil, coal, or sand pump.
(2) The part of a shaft situated below the level of the shaft bottom (sump or pit).
ii. A low point in an aircraft engine in which lubricating oil collects and is stored or transferred to an external tank for reuse. See oil sump.