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

International Project Week Fh Nordhausen 30.4.2010

barite content is useful ARD: acid generating potential

because of sulfidic mineral components especially pyrite

Heavy metal content is able to mobilise

International Project Week Fh Nordhausen 30.4.2010

Underground mining

Open pit

International Project Week Fh Nordhausen 30.4.2010

International Project Week Fh Nordhausen 30.4.2010

International Project Week Fh Nordhausen 30.4.2010

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)

International Project Week Fh Nordhausen 30.4.2010

International Project Week Fh Nordhausen 30.4.2010

Approximately 8 Mio m³ of solid waste

Together with app 800,000 m³ water

International Project Week Fh Nordhausen 30.4.2010

Contamination of groundwater through heavy metals, acidic water

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

International Project Week Fh Nordhausen 30.4.2010

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

Toxic free Sodium Cyanide

The possibility of insuficiant capacity of the cavities

International Project Week Fh Nordhausen 30.4.2010

Similar risks like open pit method Additionally dusting

dam failure due to erosion, overtopping or liquefaction

of the dam caused by vibration (blasting)

International Project Week Fh Nordhausen 30.4.2010

Finish

Group 10Lecturer: Imre Gombkötő

University of Miskolc

Students: Friedrich JagnowJonas FinkeStefan Lohberger

International Project Week Fh Nordhausen 30.4.2010

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

International Project Week Fh Nordhausen 30.4.2010