open pit mining through underground workings

OPEN PIT MINING THROUGH UNDERGROUND WORKINGSKnow More

OPEN PIT MINING THROUGH UNDERGROUND WORKINGS 40 MAKING THE HAZARD VISIBLE All areas of a working bench or flitch that are likely to be underlain by underground workings must be clearly marked and access to this area must be controlled by a specific set of procedur These procedures should specify the personnel responsible for monitoring and...

11 PHASES OF A MINING PROJECTKnow More

Although underground mining is a less environmentally-destructive means of gaining access to an ore deposit it is often more costly and entails greater safety risks than strip mining including open-pit mining While most large-scale mining projects involve open-pit mining many large underground mines are in operation around the world 113...

Glossary of Mining TermsKnow More

Glory hole - An open pit from which ore is extracted especially where broken ore is passed to underground workings before being hoisted Gneiss - A layered or banded crystalline metamorphic rock the grains of which are aligned or elongated into a roughly parallel arrangement...

Surface Mining Methods and EquipmentKnow More

12 Open Pit vs Underground Mining Methods While most mineral deposits can be mined by either surface or underground methods some minerals can only be recovered in a hybrid manner usually by initial extracted by open pit mining followed by underground methods Here a...

Guidelines on openKnow More

Trove Find and get Australian resourc Books images historic newspapers maps archives and more...

2 Mining MethodsKnow More

Open pit mining is a technique used to extract copper ore near the earth s surface Open pit mining is the most widely used technique of mining copper today It is accomplished by creating and using benches or terraces to gradually reach deeper under the earth s surface Underground mining is used when the copper ore is not near the earth s...

Blast vibration effects in an underground mine caused byKnow More

Dec 01 2015 0183 32 The open-pit mine is currently working at 326 m depth and is designed to reach 421 m deep It has been planned to operate the underground mine maintaining 50 m parting from the planned ultimate level of the open-pit mine Presently open-pit and underground...

Two northern BC gold mines poised to start diggingKnow More

Mar 30 2020 0183 32 With gold bouncing above a six-year high of US 1 600 per ounce and holding steady so far through the COVID-19 crisis greater attention is now placed on two gold-mining...

Open Pit and Underground Mineral Production ActivitiesKnow More

5 Combining open pit and underground mining Either in the initial design stage or before the end of the life of an open pit a decision may be made to extend the life of the mine by exploiting the orebody below the economic level of open p it mining by underground methods Continuous production is essential and the decision to go U/G must be made in time to complete access development so...

Risk Management Strategies for Open Pit Mining ThroughKnow More

The mechanization of mining and economic appeal of open pit mining in the last 30 years has facilitated the conversion of many historic underground mines into large open pits Historic underground workings or voids below the working floor of an open pit and voids behind or intersected by pit slopes have the potential to collapse and induce...

Strip MiningKnow More

115131 Mine workings Minerals are typically excavated by underground mining strip mining or open-pit mining The selection of the mining technique is dictated by the physical structure location and grade or value of the ore body and by the characteristics of the adjacent geological materials...

Regis clears way for underground gold developmentKnow More

Dec 14 2020 0183 32 Regis Resources is set to develop an underground mine under the Garden Well open pit in Western Australia after receiving board approval...

Risk Management Strategies for Open Pit Mining ThroughKnow More

Historic underground workings can be a source of unexpected collapse or subsidence of ground when being mined via open pit methods presenting a safety risk to personnel and an economic risk to...

UNDERGROUND WORKINGS DETECTION AT THE FIMISTONKnow More

Fimiston Open Pit is now mining through a dense network of underground development workings with open and filled stopes of varying siz Figure 1 is a photo taken from the pit showing some open and filled stopes intersecting with pit slope Figure 1 Open and filled stopes intersecting with pit slope the batter is 20 m high...

Stability and access implications of open pit miningKnow More

Increasingly mining operations are looking at developing large open pits down through old abandoned underground workings in order to extract remnant ore left within pillar zonMaintaining pit wall stability while mining through major scale underground stoping zones presents both a risk and challenge that can have significant impact on overall pit economics and viability...

Mining Through Underground Workings in Fimiston Open PitKnow More

The Kalgoorlie Consolidated Gold Mines KCGM Fimiston Open Pit is located on the eastern boundary of the Kalgoorlie-Boulder City and is mining an area traditionally known as the Golden Mile The pit area has been continuously worked since 1893 predominantly by underground mining methods and more recently through open cut mining There are over 2000...

A Comparative Study of Ground and Underground VibrationsKnow More

With the increase of open-pit and underground combined mining and the occasional need of open-pit mining several underground workings may be located in close proximity to an operating open-pit mine In these cases ground vibrations generated due to open-pit blasting may be hazardous to the stability of adjoining underground workings as well...

A stochastic optimization formulation for the transitionKnow More

Jul 11 2017 0183 32 As open pit mining of a mineral deposit deepens the cost of extraction may increase up to a threshold where transitioning to mining through underground methods is more profitable This paper provides an approach to determine an optimal depth at which a mine should transition from open pit to underground mining based on managing technical risk...

Gold exploration booms in La Belle Province CanadianKnow More

Oct 01 2020 0183 32 T he PEA outlined a 22-year 35 000 t/d open pit and underground mine producing 246 000 oz gold annually in its first 14 years With an initial capital outlay of US 333 million the study pegged the after-tax net present value of the project at US 576 million at a 5 discount rate with a 229 internal rate of return...

Regulations Mine Safety and Health Administration MSHAKnow More

MSHA is responsible for enforcing the Federal Mine Safety and Health Act of 1977 Mine Act as amended by the MINER Act of 2006 The Mine Act gives the Secretary of Labor authority to develop promulgate and revise health or safety standards for the protection of...

What is Underground Mining with picturesKnow More

Dec 11 2020 0183 32 Underground mining is a technique used to access ores and valuable minerals in the ground by digging into the ground to extract them This is in contrast with techniques like open pit mining in which the surface layers of ground are scooped away to access deposits or mountaintop removal in which the top of a mountain is simply shaved off to access the ore inside...

Mining Diamonds in the Canadian Arctic The Diavik MineKnow More

Over several days in late June 2015 the authors visited the site to capture photographs and gather information on the mining operations The visit involved tours of the open pit and underground workings the processing and recovery plant and the facility in Yellowknife where diamonds are cleaned and sorted for distribution figure 3...

OPTIMIZATION OF PRODUCTION PLANNING INKnow More

underground mining methods In open pit optimization lower level blocks are linked with the blocks of upper level based on the wall angles of open pit Lerchs-Grossman algorithm Lerchs and Grossman 1965 and network flow Picard 1976 concepts are the best approaches to solve these problems...

Worley out to help miners on their open pit to undergroundKnow More

As open-pit mines reach their economic end of life mine owners are considering the viability of transitioning their open-pit operations to underground Drawing on its deep level mining expertise in South Africa Worley helps mine owners around the world to explore the feasibility of underground life of mine...

The Mining Life Open Pit vs UndergroundKnow More

Aug 22 2017 0183 32 Working underground is usually a hot noisy humid and dark business but working in an open pit mine can expose workers to weather conditions which can cause problems as well Working in the mining industry in any capacity is hard work that demands exceptional concentration and talent in order to stay safe in the environment of heavy...

Differences between underground mining and open pit miningKnow More

Apr 02 2018 0183 32 The Aguilar mine Jujuy which in 2013 completed 84 years of uninterrupted work is a deposit of zinc silver that is mined underground The Witwatersrand gold mine in South Africa is an excellent example of underground mining that exploits gold from ancient rocks at depths of up to 4 km underground What is open pit mining...

Green MiningKnow More

Although open pit mining link to mining solution page contributes about 85 of all mineral mining it is one of the most environmentally taxing About 73 of extracted rock goes to waste Meanwhile underground mining wastes only 7 of the extracted rock but is more expensive Hartmann and Mutmansky 2002...

Mining Technology in the Nineteenth Century ONEKnow More

The introduction of open pit mining with power shovels first developed in the Mesabi Iron Range in Minnesota and later at the Bingham pit in Utah in the late nineteenth century greatly changed the scale of surface mining in the twentieth century Underground mining took place in both hardrock and placer deposits and used excavation support...

Method of ventilation openKnow More

Method of ventilation open-pit and underground workings including fresh air in mining production through the main fan characterized in that the ventilation in the career carried out by a combination of non-isothermal free jets that create career fans with electric and convective flows which create hydrogen by the steam generators with...

Climax Mine Climax Open Pit Mine Climax Climax MiningKnow More

Climax Mine Climax Open Pit Mine Climax Climax Mining District Lake Co Colorado USA Near the summit of Fremont Pass in Lake Co approximately 15 miles north of Leadville Owned by AMAX Corp A molybdenum mine comprised of a large open pit and underground workings When working...