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An indication of the number and location of tailings dam failures since 1985.
An analysis of tailings dam failures over the last three decades, indicates that while the overall number of failures has decreased, the number of serious failures has increased (Bowker and Chambers 2016).
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This photo has been graciously provided to be used in the GRID-Arendal resources library by: Kristina Thygesen
Long wall coal mining under the Waratah Rivulet, that feeds Sydney's water supply, has cracked the river. Peabody coal company is trying to glue the cracks together again with an epoxy substance.
Photos by Max Phillips // Jeremy Buckingham's office: www.flickr.com/photos/62459458@N08/sets/72157628426391761/
My dad works at a different mine than I do and he took some photos and videos for me the other day- this one is very cool.
Audrey Headframe Park
Jerome, Arizona
Largest wooden headframe still standing in Arizona, it was completed in 1918 to haul ore up from the mine. Shaft is 1900 feet deep, concrete lined with cross tunnels every 100 feet to Edith shaft. Edith shaft headframe was completed in 1915 to haul men and supplies. A wooden structure, it was torn down in 1981 and replaced with the steel version you see today, 260' to NW.
Between 1915 and 1938 almost 4 million tons of ore was extracted from the mine, producing 397,000 tons of Copper, 221 tons of silver and 5.5 tons of gold. Ore was brought to the surface then transported by tram and burro train, to the railhead in the valley. Later, ore was taken out underground through the Josephine tunnel, which was 1300 feet down and 2.5 miles long.
Tailings dam failure at the Mount Polley mine in Canada.
The Mount Polley mine, a large, open-pit and underground copper-gold mine in British Columbia, began operation in 1997 and currently processes about 22 000 tonnes of ore per day. The mineās tailings dam failed in August 2014, releasing approximately 25 million cubic metres of tailings and wastewater into a nearby creek (OAGBC 2016).
Mine operations were suspended for a year following the breach and did not fully recommence until June 2016. The tailings storage facility (surface area approx. 2.4 km2 ) was designed with three embankments ā the Main Embankment, the Perimeter Embankment and the South Embankment. These were constructed with a core built from excavated, fine-grained glacial till deposits, supported downstream by filter and rock-fill zones and upstream by a tailings/rock-fill zone. While the mine was in operation, the height of the embankments was increased in nine stages, to an eventual height of 40 metres. Shortly before the collapse, approval was being sought for Stage 10, which would have further increased the dam wall height (IEEIRP 2015).
The Mount Polley dam failure created the largest environmental disaster in Canadian mining history (Schoenberger 2016). The mine is adjacent to Polley Lake and Hazeltine Creek, which flow into Quesnel Lake, one of the worldās deepest glacial lakes and an important commercial, recreational and aboriginal fishery. It supports sockeye salmon, rainbow trout and a diverse range of other fish species. Prior to the dam collapse, the water in the lake had a very low level of particulate material. The collapse resulted in a massive sediment-laden plume scouring Hazeltine Creek and entering the west basin of the lake. Petticrew et al. (2015) monitored the lake for two months post-spill. They found increases in conductivity and temperature and a persistent, high-turbidity layer below the thermocline. While subsequent monitoring indicated that the turbidity reduced to near background level by the beginning of 2015 (SMA 2016), the full effects of the spill may not yet be apparent or easily identifiable.
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This photo has been graciously provided to be used in the GRID-Arendal resources library by: Kristina Thygesen
The coal mining risk assessment includes an assessment of the Coal Authority Mining Report. The fundamental purposes of the coal mining risk assessment are to identify the risks of coal mining at the development site. The Coal Authority is a legal consultant for any planning application within a High-Risk Zone. Also, a visit to the offices of the Coal Authority to assess mining plans, a review of modern and historical published geological maps, and a review of technical reports/memoirs. For more details, kindly visit- www.earthenvironmental.co.uk/coal-mining-risk-assessment/
Companies use data mining to extract your information and use it to benefit themselves and personalize your experience. Data mining is controversial in terms of protecting your privacy.
Opal Miner at work with an electric jackhammer underground in his mine on the Three Mile Field near Lightning Ridge.
Winding house Pano, showing the two huge pistons used to drive the wire rope drum which raised and lowered the cage containing the men and coal tubs .
A winding engine is a stationary engine used to control a cable, for example to power a mining hoist at a pit head. Electric hoist controllers have replaced proper winding engines in modern mining, but use electric motors that are also traditionally referred to as winding engines.
Winding drum, with depth indicator to the left
The first powered winding engines were stationary steam engines. The demand for winding engines was one factor that drove James Watt to develop his rotative beam engine, with its ability to continuously turn a winding drum, rather than the early reciprocating beam engines that were only useful for working pumps.
They differ from most other stationary steam engines in that, like a steam locomotive, they need to be able to stop frequently and also reverse. This requires more complex valve gear and other controls than are needed on engines used in mills or to drive pumps.
Mobile conveyor system for mining iron ore at the Cloudbreak minesite, Pilbara region, Western Australia.
GHH mining machine underground shovel, when they were introduced in the Monteponi mine, helped to make the work lighter and faster. He wouldn't mind seeing it displayed in a protected area and not exposed to the elements. A machine created to work indoors that ends its "career" outdoors. The most interesting part are the reinforcements made by hand welding along the entire profile of the blade of the shovel. Although not a certainly functional artistic work; this is proof of the mastery and skills that the staff had acquired in working in a mine like this.
Pala da sottosuolo GHH mining machine, quando vennero introdotte nella miniera di Monteponi aiutarono a rendere il lavoro piĆ¹ leggero e veloce. Non sabbe male vederla esposta in una zona protetta e non esposta alle intemperie. Una macchina che nasce per lavorare al chiuso che finisce al sua "carriera" all'aria aperta. La parte piĆ¹ interessante sono i rinforzi realizzati con saldatura a mano lungo tutto il profilo della lama della pala. Seppure non un lavoro artistico sicuramente funzionale; questo a riprova della maestria e delle competenze che il personale aveva acquisito nel lavorare in una miniera come questa.
Blue Bird started out as a small silver mine, growing into a producer of high-quality ore by 1876. Promising new mines regularly made headlines, and Blue Bird was no different. Its proximity to North Boulder Creek, as well as its highly valued ore, which was assayed at $6,000 per ton ($126,000 in today's money!), created local enthusiasm for the mine. The mine stayed active until an 1893 drop in silver prices made production too expensive to stay profitable.
Mining bee flying above tea flower.
Class: Insecta
Order: Hymenoptera
Superfamily: Apoidea
Family: Apidae
Subfamily: Apinae
Tribe: Anthophorini
Genus: Amegilla
Machine (along with sister machine) was purchased to replace 2 Cat 5130's which originally belonged to Bridgetown Plant.
The Cat's were parked up for some time and incurred a lot of downtime through burst hoses etc. The 5130's received a lot of negative press due to early hour reliability. Most problems were sorted when the larger B series came out, unfortunately for Cat the damage had already been done by that time and a sour taste had been left.
The 5130's were sold to Hoss Equip in Texas and the Demag's worked steady for many years. The site has since closed and the machines will be sold on.
'Mining Machinery', by T. Bryson, 3rd edition. Published in 1952 by Pitman & Sons Ltd., London. Red hardback book with title in gilt lettering on spine.
West Lothian Museums. http://www.westlothian.gov.uk/tourism/museumsgalleries/ums/information
If you would like more information about this object, please contact: museums@westlothian.gov.uk, quoting WLDCM1995.096.024.
Lead mining began on this site in 1814 but was developed further in 1834. The huge engine house was constructed in 1882 to house a massive beam engine pump in the last unsuceesful stage of mining which closed in 1885. It would have amde a fantastic sight I am sure with a working beam engine inside.
Scanned of a fujichrome 35mm slide shot in 1988, backlighting rescued by modern HDR processing.
Male Clarke's Mining Bee (Andrena clarkella). Not a brilliant shot as it's difficult to get at them, as described on the photo of the female.
In February 2000, an upstream tailings dams at the Baia Mare gold mine in Maramures County, Romania failed. The failure is thought to have been caused by a combination of poor design, unforeseen operating conditions and heavy rain and snow, which resulted in overtopping (BMTF 2000).
Two months later, this failure was followed by another upstream dam failure at the nearby Borsa lead and zinc mine, which also occurred as a result of overtopping. These two incidents released more than 200 000 cubic metres of contaminated water and 40 000 tonnes of tailings into tributaries of the Tisza River, a major tributary of the Danube (WWF 2000).
The Baia Mare spill was the most damaging of the two failures, releasing 50 to 100 tonnes of cyanide, as well as copper and other heavy metals, making it the worst environmental disaster in Europe since Chernobyl. Over a four-week period the combined spills travelled through Romania into Hungary, Serbia and Bulgaria, and finally entered the Black Sea. The spill traversed a number of ecologically sensitive and highly populated areas, with significant transboundary implications. Acute effects of the cyanide were observed along the river system to the point where the Tisza River meets the Danube. The Baia Mare failure created a 30- to 40-kilometre-long wave of contaminants that wiped out the flora and the fauna of the central Tisza River. Plankton were killed instantly by the plume; fish were killed in the plume or died soon after. In the Hungarian section of the river, the impact was especially severe ā it is estimated that 1 240 tonnes of fish were killed (UNEP/OCHA 2000).
An international task force, chaired by the European Commission, was created to assess the damage and propose remedial actions (EU 2000). The task force insisted on the necessity of providing adequate emergency-storage facilities and recommended that new tailings storage facilities should not be allowed to store water or slurry containing cyanide in tailings ponds open to the elements (Lucas 2001).
For any form of publication, please include the link to this page:
This photo has been graciously provided to be used in the GRID-Arendal resources library by: Kristina Thygesen