Panex Resources Inc -- ehem. De Beira Goldfields (Seite 74)
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Guten Morgen, ich kann auch keinen Handel feststellen!? Es könnte doch sein, das unsere Perle bald wieder regulär gehandelt werden kann, auch in Frankfurt 
Nur mal ganz kurz und knapp, arbeite gerade....wenn du auf den link clickst erscheint das Basalbild vom video...dann auf das Bild oder den >Startpfeil drücken und das Video startet...ist von Anglo...und beschreibt die neue Technik im Gold mining.
Antwort auf Beitrag Nr.: 46.511.109 von slideshow am 24.02.14 09:16:20HI Slide!...Anglo Gold ashanti hat eine neue Abbautechnik im goldmining entwicklet, insbesondere in der Tiefe, tiefer als 4000 Meter, 4000 – 5000 Meter.—Dabei wird auf Sprengen(gefährlich!) verzichtet und es werden ganz eng beieinanderliegende Röhrenverbindungen durch den Fels(etwa) zwischen benachbarten Stollen gebohrt....diese Methode liefert direkt die Gold drillchips, während bei blasting(Sprengung) aller möglicher Abfall im Material mitgeliefert wurde.—Die neue Methode von Anglo ist zudem stärker viable!(=wirtschaftlich!)...alle sollen Zugang zu der neuen Methode bekommen die sehr positiv aufgenommen wurde und schon 1974 angedacht war von Anglo und jetzt seit 2010 intensiv entwickelt wurde. Aktuell laufen die erstenTests mit Erfolg.—Klaus Eckhof hat ja seinerzeit an Anglo und Randgold verkauft für ca. 600 Mio CAD...Anglo Gold Ashanti und Randgold sind in diesem früheren Eckhof-Projekt etwas weiter östlich von Giro am produzieren...es flossen dort unlängst 1.7 Mrd. dollars in Kibali.
Antwort auf Beitrag Nr.: 46.509.633 von auriga am 23.02.14 18:54:40Hi auriga, kann ich leider nicht öffnen.
Kannst Du den Inhalt liefern?
Heute morgen kein Kurs.
Wo klemmt es.
Habe ich etwas übersehen?
Kannst Du den Inhalt liefern?
Heute morgen kein Kurs.
Wo klemmt es.
Habe ich etwas übersehen?
Trading Spotlight
Are the days of drilling and blasting coming to an end?
Since 2010, the Technology Innovation Consortium has been looking for ways to leverage old technology in new ways, in an effort to not only extract additional gold from the current depths of around 4 000m, but also in realising its long term vision to reach depths of 5000m and beyond.
In the current drill and blast paradigm used in gold and platinum hard rock mining, only drilling and cleaning is mechanical, while blasting makes use of explosives. This results in significant delays, as the mine has to be evacuated to clear blast fumes. Additionally, blasting poses a significant seismicity risk, while this batch process does not allow for a continuous, 24 hour
operation.
To address some of these challenges, the Consortium looked to reef boring as a possible solution. Raise boring in its current form is used as a vertical drilling technique for ventilation purposes and ore passes, boring mostly through waste rock to create the support services needed for mining operations. The Consortium, however, decided to investigate and test the feasibility of using raise bore machines to drill out the gold bearing reef. By applying existing technology initially, the raise bore machine proved successful in drilling out the reef, thus only extracting the gold bearing rock or channel width, thus reducing the amount of waste significantly.
The Consortium called on its expertise to ensure as much of the reef can be extracted as possible. Drilling tests commenced on 97 Level at TauTona mine, and the Consortium is currently testing a machine for reef channels from 40 to 80 cm, called medium range channels. The challenge, however, is to find or develop machines suitable to drill all reef range, varying from 10cm in the Vaal River district up to 1.5m in the West Wits district.
The first test holes were drilled up-dip, at a diameter of 950mm and by means of the double pass method. Once completed, a reamer of 750mm was tested, drilling up-dip and using the single pass method; however, the reamer size could not complete the task predominantly due to the reamer design. At this point, an improved reamer design of 660mm was discussed and the design process commenced. While awaiting delivery, an existing reamer of 540mm was
applied and successfully drilled two test holes using the double pass method, and another test hole using the single pass method.
The new reamer is currently undergoing minor engineering modifications before tests will commence early in June. The design specifies that the cutter saddles form part of the stem, in order to make use of two roller bearing cutters for the diameter of 660mm. The planned tests will see the machine drilling the holes, first using the double pass method and then the single pass method. If successful, the team will once again attempt drilling holes by means of the single pass method at a diameter of 750mm, incorporating the improved design changes from the 660mm reamer.
Neels Jansen, Reef Boring Project Manager for the Consortium, had this to say: "The real test for the method will start once reef boring can be followed by the backfill. We need to test the ground behaviour once we start drilling in-between the backfilled holes. If successful, reef boring will not only increase our extraction rate, but it also has the potential to change the entire mining industry".
http://www.aga-tic.com/agatic/news.jsp?newsID=31
http://www.aga-tic.com/agatic/
Since 2010, the Technology Innovation Consortium has been looking for ways to leverage old technology in new ways, in an effort to not only extract additional gold from the current depths of around 4 000m, but also in realising its long term vision to reach depths of 5000m and beyond.
In the current drill and blast paradigm used in gold and platinum hard rock mining, only drilling and cleaning is mechanical, while blasting makes use of explosives. This results in significant delays, as the mine has to be evacuated to clear blast fumes. Additionally, blasting poses a significant seismicity risk, while this batch process does not allow for a continuous, 24 hour
operation.
To address some of these challenges, the Consortium looked to reef boring as a possible solution. Raise boring in its current form is used as a vertical drilling technique for ventilation purposes and ore passes, boring mostly through waste rock to create the support services needed for mining operations. The Consortium, however, decided to investigate and test the feasibility of using raise bore machines to drill out the gold bearing reef. By applying existing technology initially, the raise bore machine proved successful in drilling out the reef, thus only extracting the gold bearing rock or channel width, thus reducing the amount of waste significantly.
The Consortium called on its expertise to ensure as much of the reef can be extracted as possible. Drilling tests commenced on 97 Level at TauTona mine, and the Consortium is currently testing a machine for reef channels from 40 to 80 cm, called medium range channels. The challenge, however, is to find or develop machines suitable to drill all reef range, varying from 10cm in the Vaal River district up to 1.5m in the West Wits district.
The first test holes were drilled up-dip, at a diameter of 950mm and by means of the double pass method. Once completed, a reamer of 750mm was tested, drilling up-dip and using the single pass method; however, the reamer size could not complete the task predominantly due to the reamer design. At this point, an improved reamer design of 660mm was discussed and the design process commenced. While awaiting delivery, an existing reamer of 540mm was
applied and successfully drilled two test holes using the double pass method, and another test hole using the single pass method.
The new reamer is currently undergoing minor engineering modifications before tests will commence early in June. The design specifies that the cutter saddles form part of the stem, in order to make use of two roller bearing cutters for the diameter of 660mm. The planned tests will see the machine drilling the holes, first using the double pass method and then the single pass method. If successful, the team will once again attempt drilling holes by means of the single pass method at a diameter of 750mm, incorporating the improved design changes from the 660mm reamer.
Neels Jansen, Reef Boring Project Manager for the Consortium, had this to say: "The real test for the method will start once reef boring can be followed by the backfill. We need to test the ground behaviour once we start drilling in-between the backfilled holes. If successful, reef boring will not only increase our extraction rate, but it also has the potential to change the entire mining industry".
http://www.aga-tic.com/agatic/news.jsp?newsID=31
http://www.aga-tic.com/agatic/
AngloGold looks to new method to unlock riches
by Allan Seccombe, 02 September 2013, 07:54
Picture: THINKSTOCK
ANGLOGOLD Ashanti is working on a new mining method that promises to be one of the most fundamental changes in deep-level gold mining, which moves away from drilling holes into rock kilometres underground and using explosive to extract gold, putting people’s lives in danger and leaving far too much of the metal underground.
AngloGold and the team that has been at work on this concept since 2010 are not inventing anything new, but they are putting together tried-and-tested technologies to extract gold-bearing reef mechanically.
"The fact is that 99% of the answers we will find already exist. It is about putting them together in a fashion never thought of before," says Shaun Newberry, senior vice-president in charge of AngloGold’s projects and technology division.
"To find a new technology is almost impossible. It’s a rarity. It’s like a miracle," he says.
"What it’s about is putting things that already exist together in a creative and different fashion in ways that people never imagined they were intended."
He declined to name the companies involved, citing confidentiality agreements. The work done could create machines that, if proven to work, will make their developers extremely wealthy and give a competitive advantage.
AngloGold and a large number of teams from companies and research organisations in a wide range of disciplines are adapting existing machines into prototypes that are deployed in AngloGold’s South African mines to test them in harsh underground conditions.
One of the major challenges is to reconfigure tunnel-boring machines, which are big, powerful pieces of equipment into smaller, more agile, reusable machines, which can be reused to drill parallel access tunnels into the reef quickly.
Between those tunnels AngloGold wants to drill much smaller interconnecting holes, punching out the gold-bearing reef, and then filling the holes with a solution that turns as hard as rock within 21 days, keeping the mining area as stable as possible by not leaving behind any voids, a major problem in conventional mines where mined-out areas are propped up with packs of wood or bags of a cement-based backfill. The backfill AngloGold and its teams have developed hardens to 170 megapascals — more than five times the compressive strength of concrete used in bridges and high-rise buildings. Using explosives puts a lot of energy into the rock, and by opening voids in which miners can work, heightening risk. This method removes these dangers.
AngloGold is testing the technology at its Tau Tona and Kopanang mines. At Tau Tona three reef-boring machines will be deployed next year to test their effectiveness on reefs of 40cm to 80cm in thickness. The backfill concept will also be tested at the three sites.
The first machine will be in place in April and the last will be deployed at the end of the third quarter of next year. A smaller machine will be tested at a narrow 1cm-40cm reef at Kopanang during the second quarter of next year.
AngloGold has a total endowment of 230-million ounces of gold in SA, going down to 1g/t in places. Existing mining methods can extract 30-million; the new method will unlock much more.
One opinion in the industry is that in coming years just three major gold mines will be left in SA if nothing is done to change the cost and safety profiles of deep-level mining. These mines will be AngloGold’s Moab Khotsong and Mponeng, and Gold Fields’ South Deep mine.
The development of this technology is not aimed at cutting job numbers underground, Mr Newberry says.
SA’s mines are enormously labour intensive and half of mines’ costs are wages. This technology will take some years to develop and the costs have to make financial sense — something Mr Newberry declines to be drawn on as the work is still in the testing phase. Mining companies are notoriously averse to rushing into new technology, so it will take years to phase it in.
"If we don’t find a new mining method there will be no jobs in 30 years from now. This process creates jobs. You can’t just switch off the labour-intensive drill-and-blast type mining we do now," Mr Newberry says.
"We will be able to open ore bodies that we are not mining because they’re not viable. It will create a technical and financial model to convert more resources into reserves which means more mining over a longer period of time," he says.
http://www.bdlive.co.za/business/mining/2013/09/02/anglogold…
by Allan Seccombe, 02 September 2013, 07:54
Picture: THINKSTOCK
ANGLOGOLD Ashanti is working on a new mining method that promises to be one of the most fundamental changes in deep-level gold mining, which moves away from drilling holes into rock kilometres underground and using explosive to extract gold, putting people’s lives in danger and leaving far too much of the metal underground.
AngloGold and the team that has been at work on this concept since 2010 are not inventing anything new, but they are putting together tried-and-tested technologies to extract gold-bearing reef mechanically.
"The fact is that 99% of the answers we will find already exist. It is about putting them together in a fashion never thought of before," says Shaun Newberry, senior vice-president in charge of AngloGold’s projects and technology division.
"To find a new technology is almost impossible. It’s a rarity. It’s like a miracle," he says.
"What it’s about is putting things that already exist together in a creative and different fashion in ways that people never imagined they were intended."
He declined to name the companies involved, citing confidentiality agreements. The work done could create machines that, if proven to work, will make their developers extremely wealthy and give a competitive advantage.
AngloGold and a large number of teams from companies and research organisations in a wide range of disciplines are adapting existing machines into prototypes that are deployed in AngloGold’s South African mines to test them in harsh underground conditions.
One of the major challenges is to reconfigure tunnel-boring machines, which are big, powerful pieces of equipment into smaller, more agile, reusable machines, which can be reused to drill parallel access tunnels into the reef quickly.
Between those tunnels AngloGold wants to drill much smaller interconnecting holes, punching out the gold-bearing reef, and then filling the holes with a solution that turns as hard as rock within 21 days, keeping the mining area as stable as possible by not leaving behind any voids, a major problem in conventional mines where mined-out areas are propped up with packs of wood or bags of a cement-based backfill. The backfill AngloGold and its teams have developed hardens to 170 megapascals — more than five times the compressive strength of concrete used in bridges and high-rise buildings. Using explosives puts a lot of energy into the rock, and by opening voids in which miners can work, heightening risk. This method removes these dangers.
AngloGold is testing the technology at its Tau Tona and Kopanang mines. At Tau Tona three reef-boring machines will be deployed next year to test their effectiveness on reefs of 40cm to 80cm in thickness. The backfill concept will also be tested at the three sites.
The first machine will be in place in April and the last will be deployed at the end of the third quarter of next year. A smaller machine will be tested at a narrow 1cm-40cm reef at Kopanang during the second quarter of next year.
AngloGold has a total endowment of 230-million ounces of gold in SA, going down to 1g/t in places. Existing mining methods can extract 30-million; the new method will unlock much more.
One opinion in the industry is that in coming years just three major gold mines will be left in SA if nothing is done to change the cost and safety profiles of deep-level mining. These mines will be AngloGold’s Moab Khotsong and Mponeng, and Gold Fields’ South Deep mine.
The development of this technology is not aimed at cutting job numbers underground, Mr Newberry says.
SA’s mines are enormously labour intensive and half of mines’ costs are wages. This technology will take some years to develop and the costs have to make financial sense — something Mr Newberry declines to be drawn on as the work is still in the testing phase. Mining companies are notoriously averse to rushing into new technology, so it will take years to phase it in.
"If we don’t find a new mining method there will be no jobs in 30 years from now. This process creates jobs. You can’t just switch off the labour-intensive drill-and-blast type mining we do now," Mr Newberry says.
"We will be able to open ore bodies that we are not mining because they’re not viable. It will create a technical and financial model to convert more resources into reserves which means more mining over a longer period of time," he says.
http://www.bdlive.co.za/business/mining/2013/09/02/anglogold…
Gold mechanisation achieves success
By: Creamer Media Reporter
21st February 2014
Creamer Media's Shannon de Ryhove speaks to Mining Weekly editor Martin Creamer about the progress of the successful new AngloGold Ashanti gold-mining technology, the 'South African Technology'.
Edited by: Creamer Media Reporter
http://www.miningweekly.com/article/gold-mechanisation-achie…
By: Creamer Media Reporter
21st February 2014
Creamer Media's Shannon de Ryhove speaks to Mining Weekly editor Martin Creamer about the progress of the successful new AngloGold Ashanti gold-mining technology, the 'South African Technology'.
Edited by: Creamer Media Reporter
http://www.miningweekly.com/article/gold-mechanisation-achie…
na ja... wenn hier mal der Umsatz steigt dann knallt es. Warten ist angesagt 
!
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