Group 10 Lecturer:Imre Gombköt ő University of Miskolc - Hungary Students:Friedrich Jagnow Jonas...

Group 10

Lecturer: Imre Gombkötő University of Miskolc - Hungary

Students: Friedrich JagnowJonas FinkeStefan Lohberger

International Project Week Fh Nordhausen 30.4.2010

Imaginary mining facility: Case study A new explored ore field south of Goslar

is to be exploited. Think about the handling and storage of

tailings and its risks.

25.000.000 metric tonnes of ore 14% Zn, 6% Pb, 5% Cu, 1 g/t Au, 140 g/t

Ag and 20% barite 500 to 900 meters deepth Nearby existing mining

facilities

pic. By Harz Minerals GmbH

Tailings are a waste product of the ore processing.

Suspension of water and fine rock particles

Often contain dangerous chemicals and components like heavy metals, cyanide and acids

Risks depend on mineralogy, mining technology, mineral processing and themethod of deposition


barite content is useful ARD: acid generating potential

because of sulfidic mineral components especially pyrite

Heavy metal content is able to mobilise


Underground mining

Open pit


Partical size below 200 mikrometers Flocculant (polymers) Flotation agents such as:

organic collectors (xanthate), pH-regulators (sodium

hydroxide, sulfidic acid) depressors (sodium cyanide) frothers (alcohols)


Approximately 8 Mio m³ of solid waste

Together with app 800,000 m³ water


Contamination of groundwater through heavy metals, acidic water

Toxic free Sodium Cyanide Damage to flora & fauna Risk of unexpected human activity


Contamination of groundwater and surface water through heavy metals and acidic water

Toxic free Sodium Cyanide

The possibility of insuficiant capacity of the cavities


Similar risks like open pit method Additionally dusting

dam failure due to erosion, overtopping or liquefaction

of the dam caused by vibration (blasting)


Finish

Group 10

Lecturer: Imre Gombkötő University of Miskolc

Students: Friedrich JagnowJonas FinkeStefan Lohberger


Google Earth imageryopen pit mining: http://places.mongabay.com/australia/open_pit_mine.jpgunderground mining: http://upload.wikimedia.org/wikipedia/commons/2/2d/Bergwerk-monopol-

bergkamen.jpgjaw: http://www.limingjawcrusher.com/pic/jaw.jpg


Group 10 Lecturer:Imre Gombköt ő University of Miskolc - Hungary Students:Friedrich Jagnow Jonas...

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