narrow reef mining production figures

Harmony Gold mining

Harmony Gold is the first largest gold mining company in South AfricaHarmony operates in South Africa and in Papua New GuineaThe company has nine underground mines one open-pit mine and several surface operations in South Africa In Papua New Guinea it has Hidden Valley an open-pit gold and silver mine and a 50 interest in the Morobe Mining Joint Venture which includes the Wafi...

Variations in ultra

for narrow reef mining in ultra-deep operations in very hot rock The stope ventilation and cooling needs are driven primarily by the difference between the air temperature and that of the rock front being excavated These needs depend on the face utilization geometry face advance rate and direction layout backfill use of water and...

Major Mines Projects

The Telfer Underground comprises the sub level cave mine and selective high-grade reef mining and Western Flanks reef and stockwork mining Since 31 December 2019 both the Mineral Resources and Ore Reserves have been depleted by 005 million ounces of gold and 001 million tonnes of copper...

PDF A progress report on ultra

A progress report on ultra-high-pressure waterjet cutting underground the future of narrow reef gold and PGE mining May 2013 Journal- South African Institute of Mining and Metallurgy 113 1 1-8...

Major Mines Projects

Jun 03 2020 0183 32 Masimong exploits the Basal Reef and the B-Reef by means of conventional tabular narrow reef stoping method Mining is conducted at a depth of between 1 650m and 2 010m below collar Masimong mines at moderate depths of between 1 650m and 2 010m below surface The reef horizon is accessed by means of conventional grid development...

Lecture 4 Underground Mining

Nov 02 2011 0183 32 Lecture 4 Underground Mining 1 Hassan Z Harraz hharraz2006 yahoo 2010- 2011 This material is intended for use in lectures presentations and as handouts to students and is provided in Power point format so as to allow customization for the individual needs of course instructors...

Surface mining planning and design of open pit mining

Jan 09 2016 0183 32 Table 1 is the calculation of the mining cutoff grade for a copper project with the following parameters 30 kt/d 33000 st pd of ore mined for 20years 300 000 000 capital cost include replacement capital 100 mining cost per ton of ore 095 mining cost per ton of waste 300 processing cost per ton of ore 100 general and administrative...

A linear programming and stochastic analysis of mining

2 of mined reef area per month The number of production panels required to meet a planned production target can be determined from the set production rate A typical shaft produces about 100 000tpm run of mine ROM ore which equates to about 25 000m2/month of reef area at an ore density of about 4t/m3 typical of UG2 reefs...

THE USE OF HIGH

The Southern African Institute of Mining and Metallurgy Platinum 2012 1017 P Fraser THE USE OF HIGH-PRESSURE WATER-HYDRAULIC HYDROPOWER TECHNOLOGY IN SOUTH AFRICAN NARROW-REEF HARD-ROCK MINES P Fraser Hydro Power Equipment Pty Ltd Abstract The UniRig shown in Figures 2 and 3 is designed as a single rig capable of both face side- and...

A long hole stoping system for mining narrow platinum reefs

A long hole stoping system for mining narrow platinum reefs All relevant design perimeters of the area to be mined were taken into consideration Production targets The following production targets were set To optimize face advance Target of 2 m per blast 125 m drilled per single shift 5000 m per month on a double shift basis...

PDF Narrow

Narrow-reef mechanized mining lay out at Anglo American Platinum The results thus far achieved from the XLP production trial clearly demonstrate that higher production levels gt 4000...

Gold Occurrences in Central Queensland

Jack described the Welcome Reef as quartz containing pyrite arsenopyrite and minor galena and sphalerite in fine-grained greywacke This appears to have been the main mine in the area The only production figures recorded are for 1899 and 1900 when 3 965 tons of...

SALIENT ISSUES IN THE REPORTING OF MINERAL RESOURCES

The Southern African Institute of Mining and Metallurgy Narrow Vein and Reef 2008 G Njowa Page 6 variance effect namely that mining needs to be controlled on the grades of large tonnage blocks and not small-volume sampl 3 SALIENT ISSUES BORNE IN THE MINERAL RESOURCES AND MINERAL RESERVE STATEMENTS...

TUNGSTEN DEPOSITS OF BOULDER COUNTY COLORADO

The tungsten district of Boulder County Colo ia a narrow belt trending west-aouthweat and about 10 milea long in the pre-Cambrian terrane weat of Boulder Mining began in 1900 and the total production of ferberite concentrate through 1938 has been equivalent to 20 650 tons containing 60 percent of WOg...

GOLD FIELDS

Mining has been typically on the BXR in the south from 2 Shaft through to 1 Shaft in the north At Beatrix 3 Shaft mining is typically done on reef types associated with a transition from BXR to AAR To the north of 3 Shaft the VS5 erodes the underlying AAR The BXR is not developed at 4 Shaft where the principle reef is the KKR...

Underground mining hard rock

The mining method selected is determined by the size shape orientation and type of orebody to be mined The orebody can be narrow vein such as a gold mine in the Witwatersrand the orebody can be massive similar to the Olympic Dam mine South Australia or Cadia-Ridgeway Mine New South WalThe width or size of the orebody is determined by the grade as well as the distribution of the ore...

v117n3a8 Narrow

ULP mining below 400 m utilizing the narrow-reef mechanized mining layout has been shown to create signifi-cantly more value from both a financial and an operational perspective due to the extraction ratios that can be achieved using these methods coupled with the overall efficiencies gt 4000 m2 production per month of the XLP/ULP equipment...

PDF A progress report on ultra

Once the efficient use of waterjets in stopes has been implemented on a routine basis and at an industrial scale a new era of narrow-reef mining can beginFigure 1b -Figure 2 -1b2 Pro cutting head by KMT Ltd for permanent working pressure of 35 kbar and max 62 kbar pressure KTM 2007 and outline and crosssection of a typical waterjet...

mechanized mining equipments for narrow reef mining

mechanized mining equipments for narrow reef mining hard rock mining equipment business planindustry news introduction to mining the geologist planning developing and exploiting of a mineral deposit the mining engineer mining equipment which extracts the softer minerals like coal without the use surface mining...

v116n3a10 Trends in productivity in the South African gold

Main Reef These were selected because they According to Mining Technology 2015 production at TauTona fell to 409 000 ounces in 2007 down gold deposits are narrow reefs which makes mechanization difficult hence the sector is highly labour-intensive...

Presidential address

narrow reef mining industry typically the gold and platinum mines has battled to control working costs in a labour intensive industry The conventional mining methods used in the majority of the narrow reef mining operations were established over many years The technology developed for these stoping operations can be categorized as follows...

Production

The Merensky Reef was the principal source of pgm from the time that it was first worked in 1925 until the end of the 20th century However extraction of other reefs has grown in importance and by 2011 the Merensky Reef accounted for only 22 per cent of all the platinum ore processed in South Africa...

DR Congo mining transparency site launched

Nov 01 2011 0183 32 A website is launched to promote greater transparency in the Democratic Republic of Congo s mining sector which is plagued by conflict and corruption...

Mining industry in Australia

Dec 17 2020 0183 32 Key figures and rankings about brands and compani Consumer Reports Evolution Mining s gold production volume FY 2012-2020 Volume of gold production of OceanaGold Corporation 2011-2019...

Evaluating the Viability of Pumpable Emulsion Explosives

emulsion explosives for use in South African narrow reef mining operations By approaching the problem from multiple perspectives this research report aimed first to propose a theoretical framework and suite of equipment suitable for the implementation of pumpable emulsions within the narrow reef...

Greens Creek Hecla Mining Company

The largest historic producer was the Elko-Prince mine in the northern part of the district Since modern mining began in 1998 22 million ounces of gold and 269 million ounces of silver were produced by Franco-Nevada Mining Normandy and Newmont Production rates peaked in 2011 and declined in succeeding years along with gold grad...

Universidade Federal do Rio Grande do Sul

Mining advances downward along the step room angle Classic Room-and-Pillar Mining In classic room-and- pillar mining only a minimum of development work is required to prepare a flat-bedded deposit for mining Roadways for ore transport and communication are established inside production stop Excavation of roadways can be combined with ore...

Newcrest Mining Limited

Melbourne Australia-- Newsfile Corp - February 10 2021 - Newcrest Mining Limited ASX NCM TSX NCM has updated its Mineral Resource and Ore Reserve estimates for the twelve month period...

Harmony pays dividend but CEO collects flak for Hidden

The mine leaked R154m in the six months owing to an 11 decline in gold production as grade fell Steenkamp said it was unlikely Target 1 would meet its 2017 plan but narrow reef mining would be implemented Zero-based costing had also been implemented in an...

Shrinkage Mining of the West Reef Resource Prestea

The West Reef mineral resource is developed on a steeply dipping narrow vein structure between 17L and 24L accessible through the Prestea Central Shaft PEA Highlights Post-tax NPV 5 of 121M with an IRR of 72 at 1 200/oz gold price Initial capital 40M required to first production...

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