Mine Water

mine water

[′mīn ‚wȯd·ər]
(mining engineering)
Water pumped from mines.

Mine Water

 

(pit water), subterranean or surface water that enters mining excavations and undergoes physicochemical changes during mining operations. Mine water is produced when subterranean waters of various horizons mix and interact with the mine atmosphere and the rocks uncovered by mining excavations. In its chemical composition and total mineralization, mine water differs from the subterranean water surrounding the mine. This is due to oxidation of the mine water, leaching of rocks, change in gas and bacterial composition, and the pollution of mine water by petroleum products and oils.

The excavations of operating mines are usually flooded. The water flow varies greatly—from tens to several thousands of cu m per hour—depending on the nature of the rocks composing the deposit and the proximity of surface water drainage. For example, in regions of fissured and karst limestones, the flooding of mines may reach several thousand cu m per hr.

The composition of mine water depends on the type of mineral being mined and the depth of the deposit. In coal deposits, for example, when deposits of sulfurous coals and pyrites are being worked, an acid water is often produced that is highly corrosive to metals and concrete. In deposits of complex ores, the water is often enriched by copper, zinc, and lead. The temperature and total mineralization of mine water increase as mine depth increases. Under certain conditions, the temperature of the water is anomalously high because the mining excavations release subterranean water from great depths. Water inflow to segments being worked is reduced by a water drawdown system. This improves the organization of extraction and excavation-cutting operations, increases labor productivity, and keeps subterranean fresh water from becoming polluted. Before disposal, mine water undergoes preliminary purification through the use of purification equipment. The proper designing of purification equipment requires knowledge of not only the expected water inflow but also the composition of the mine water; detailed exploration work must therefore be done to predict the quality of mine water.

REFERENCES

Izuchenie gidrogeologicheskikh i inzhenerno-geologicheskikh uslovii pri razvedke i osvoenii mestorozhdenii tverdykh poleznykh iskopaemykh (Metodicheskoe rukovodstvo). Moscow, 1969.
Dokukin, A. V., and L. Dokukina. Vozniknovenie kislotnykh rudnichnykh vod i bor’ba s nimi. Moscow-Leningrad, 1950.
Nazarova, L. N., G. S. Konovalov, and A. G. Kobilev. “K voprosu o roli biogennogo faktora v formirovanii khimicheskogo sostava shakhtnykh vod Donetskogo basseina.” In Gidrokhimicheskie materiafy, vol. 43. Leningrad, 1967.

V. D. BABUSHKIN

References in periodicals archive ?
It will be the first scheme on this scale in the UK and will use existing radiators to heat homes without mine water ever entering residents' properties.
In 1999, a large mine water outbreak saw the water in Saltburn Gill turn a vivid orange as it reached the beach, killing fish and river insects, smothering the bed in the stream and Skelton Beck and affecting bathing water quality on the beach.
Pumps will remove mine water to stop it entering the limestone rocks that hold the water for thousands of homes and businesses.
But since coal mining came to an end on Tyneside in the 1990s mine water has been rising up slowly through the old mines.
The Alberta Energy Regulator has wrapped up an investigation of nearly three dozen coal mine water structures across the province and has found them all to be without significant deficiencies except for one.
A spokesperson for the agency tweeted: "Orange mine water is flowing into the river from an old mine, near Holmfirth.
A low energy treatment plant that promises a 50% reduction in the electricity costs of treating mine water has been built and tested at an abandoned tin mine in Cornwall by the University of Exeter's Camborne School of Mines and the Minus Engineering company.
This ordinance makes it illegal to mine water in Nottingham for resale outside the town, Copies of this ordinance have been sent to USA Springs and potential investors.
The new facility is intended to treat a maximum flow of 3,500 gallons of mine water per minute.
Environment Agency Wales has been trying to stop the mine water polluting the river by blocking a stream from flowing into the mine.
Mine water sample was collected from Jeetpur coalmine (a gassy-mine) of India from the sump under the depth of more than 1 foot in the same way as above.
Diversified global infrastructure, finance and media company General Electric Company (GE)(NYSE:GE) announced on Thursday that it has supplied advanced filtration membranes and thermal water treatment technology to CONSOL Energy Inc, a high-Btu bituminous coal and natural gas company, to treat the mine water for use in the Buchanan No.

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