open pit mining through underground workings cjhi8p

OPEN PIT MINING THROUGH UNDERGROUND WORKINGS

OPEN PIT MINING THROUGH UNDERGROUND WORKINGS 4.0 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 procedures. These procedures should specify the personnel responsible for monitoring and

Open Pit Mining through Historic Underground Workings U ...

Jun 26, 2016  A portion of the ore bodies targeted by these pits was mined previously by underground mining methods, dating back to the mid to late 1800's. Most of the underground workings (voids) are located in the west central area of the Bonanza Pit. Figure 1 presents a view of the 3D model built using historical information data.

Open Pit and Underground Mineral Production Activities ...

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 ...

The Mining Life: Open Pit vs. Underground - MICROMINE

Aug 22, 2017  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 ...

Risk Management Strategies for Open Pit Mining Through ...

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 ...

Optimizing the open pit-to-underground mining transition ...

Feb 16, 2017  Underground mining is used when an economically viable deposit is situated sufficiently deep such that open pit mining is cost prohibitive. There exist many underground mining techniques: (i) open stoping (), (ii) room-and-pillar, (iii) sublevel caving, (iv) drift-and-fill, (v) longwall, and (vi) block caving.Determining which method(s) to use is typically based on geotechnical constraints ...

Application of open-pit and underground mining technology ...

Mar 01, 2010  Journal of Mining Science, 2009, 45(5): 485-494. [13] Che Z X, Cai Q X, Liu Y. Study on Semi-continuous Mining System of Surface Coal Mine and Application Technology. Xuzhou: China University of Mining Technology Press, 2006. (In Chinese) [14] Liu Y. Resource recovery improved through combined open-pit with underground mining technology.

Risk Management Strategies for Open Pit Mining Through ...

Underground mining in gold, base metals and coal deposits has occurred for centuries, and even millennia in some parts of the world. The mechanization of mining and economic appeal of open pit ...

pwc 2012 Americas School of Mines

Notes: Bagdad Pit Arizona – looking west Mining Methods 7 First claims staked in 1882. Property changed ownership numerous times through first half of 20th century. First mill began operation in 1928 to process ore from the underground mine. Transition to open‐pit mining began in 1945. A $240 million expansion in 1973

Guidelines on open-pit mining through underground workings ...

Trove: Find and get Australian resources. Books, images, historic newspapers, maps, archives and more.

UNDERGROUND WORKINGS DETECTION AT THE

Fimiston Open Pit is now mining through a dense network of underground development workings with open and filled stopes of varying sizes. 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 mining ...

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 zones.Maintaining 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.

Strip Mining - an overview ScienceDirect Topics

9.05.1.2.1 Mine workings and open pits. Minerals are typically excavated by underground mining, strip mining, or open-pit mining. The selection of the mine design is dictated by the physical structure and value of the ore body and by the characteristics of the adjacent geological materials.

Open-Pit Mining Definition Anglo American

Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. Open-pit mining is the most common method used throughout the world for mineral mining and does not require extractive methods or tunnels. This surface mining technique is used when mineral or ore deposits are ...

Mine Surveyor.net - Locate Old Underground Workings (Open ...

Abandoned underground workings pose a major risks in mines. For instance, in an underground operation, mining into old workings could lead to an inrush of water with the potential to kill. They also exhibit risk to open cut operations mining through the areas the previous existed.

ICMM Where and how does mining take place?

open-pit mining and quarrying – the recovery of materials from an open pit in the ground strip mining – the targeted removal of surface layers to reveal the useful ore/seams underneath. By contrast, sub-surface mining consists of digging tunnels or shafts into the ground to reach deeply buried ore deposits.

Significant Incident Report No. 272 - Department of Mines ...

Develop safe working practices that do not presume that any stope is tight-filled. Monitoring Monitor and record any change in underground conditions below open cut workings, and take further action as/when appropriate. Further information Mines Safety and Inspection Regulations 1995 r. 13.8 (3) Geotechnical Considerations

Production control system in the underground mine of ...

After testing several technologies, Codelco’s Chuquicamata Subterráneo Division has settled on the MT Onemine System. This system will be in charge of managing the LHD fleet in the macroblocks 01, 02 and 03 North and South of the Production Level, operating in the eight drives that will be in service, allowing the monitoring of KPIs, vital signs and movement of equipment in real time.

THE STATUS OF SAMPLING PRACTICE IN THE GOLD MINING ...

elements of open-pit grade control sampling 51 4.12 Average potential influence of specific sampling errors on sampling and sub-sampling elements of underground grade control sampling 54 4.13 Sample submission list accompanying the RC-drill samples 55 4.14

Mining - KCGM

The vast underground network of historical workings throughout the Golden Mile has shaped the way KCGM has mined the Pit during the past 25 years. Mining methods have also been governed by the proximity of the Fimiston Open Pit to Kalgoorlie-Boulder. Mining the Pit is a carefully planned sequence involving cooperation across a wide range of ...

Didipio Mine - OceanaGold

OceanaGold is actively supporting the Philippines through our Didipio Mine, located across the Nueva Vizcaya and Quirino provinces on the island of Luzon. OceanaGold acquired the high-grade underground gold and copper mine in 2006 through a merger with Climax Mining Ltd and commenced commercial production as an open pit operation in 2013. In 2015, the []

Strip Mining - an overview ScienceDirect Topics

9.05.1.2.1 Mine workings and open pits. Minerals are typically excavated by underground mining, strip mining, or open-pit mining. The selection of the mine design is dictated by the physical structure and value of the ore body and by the characteristics of the adjacent geological materials.

North East Openpit mining over West old workings

Openpit mining over old workings During openpit mining, a relatively thin pillar of rock may be left between the unfilled void and the pit floor or road as the pit is developed. This pillar may eventually give way into the empty void below, or heavy equipment or blasting may cause the

Open-Pit Mining Definition Anglo American

Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. Open-pit mining is the most common method used throughout the world for mineral mining and does not require extractive methods or tunnels. This surface mining technique is used when mineral or ore deposits are ...

Stability and access implications of open pit mining ...

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 zones.Maintaining 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.

pwc 2012 Americas School of Mines

Notes: Bagdad Pit Arizona – looking west Mining Methods 7 First claims staked in 1882. Property changed ownership numerous times through first half of 20th century. First mill began operation in 1928 to process ore from the underground mine. Transition to open‐pit mining began in 1945. A $240 million expansion in 1973

Oyu Tolgoi - Rio Tinto

When the underground is complete, it will be the world’s fourth largest copper mine. Open pit mining began at Oyu Tolgoi in 2011 and the copper concentrator, the largest industrial complex ever built in Mongolia, began processing mined ore into copper concentrate in 2013.

Worley out to help miners on their open pit to underground ...

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 extensions and identify the most ...

ICMM Where and how does mining take place?

open-pit mining and quarrying – the recovery of materials from an open pit in the ground strip mining – the targeted removal of surface layers to reveal the useful ore/seams underneath. By contrast, sub-surface mining consists of digging tunnels or shafts into the ground to reach deeply buried ore deposits.

Mine Surveyor.net - Locate Old Underground Workings (Open ...

Abandoned underground workings pose a major risks in mines. For instance, in an underground operation, mining into old workings could lead to an inrush of water with the potential to kill. They also exhibit risk to open cut operations mining through the areas the previous existed.

Mining of Iron Ores – IspatGuru

Mar 14, 2014  The most predominant surface mining methods used for mining of iron ores are open pit mining methods and open cut mining methods. However a few underground iron ore mines are also in operation around the globe. The decision for employing surface mining or underground mining is dependent on the proximity of the ore body to the surface.

Open Pit Mining TechniquesSurface MinesRock or Mineral ...

Open-pit Mining Open-pit mining, also known as opencast mining, open-cut mining, and strip mining, means a process of digging out rock or minerals from the earth by their elimination from an open pit or borrow. The word is used to distinguish this type of mining from

200+ TOP MINING Engineering Interview Questions and ...

75. In an underground working area CH4 and CO2 are normally expected to be found respectively. Near the roof and near the floor. 76. The most important parameter of a dust that governs its physiological effect is. Size of dust. 77. In a mine a big roof fall has taken place in the mine intake place in main intake airway. The fan drift water gauge

Digging deeper: Mining methods explained Anglo American

Learn more about open-pit mining. 2. Underground mining. Underground mining is used to extract ore from below the surface of the earth safely, economically and with as little waste as possible. The entry from the surface to an underground mine may be through a horizontal or vertical tunnel, known as an adit, shaft or decline.

UNDERGROUND WORKINGS DETECTION AT THE

Fimiston Open Pit is now mining through a dense network of underground development workings with open and filled stopes of varying sizes. 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).