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  • UNDERGROUND VENTILATION METALLIFERROUS
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    928 Ventilation plans for underground mines 929 Monitoring of toxic asphyxiant and explosive gases 30 DESIGN CONSIDERATIONS 31 Primary Ventilation The basis of effective ventilation of underground mines is the adequacy of the primary ventilation system that is the total volume flow through the mine which is...

  • The Underground Development Cycle
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    There are two principal phases of underground mining development mining and production mining Development mining is composed of excavation almost entirely in waste rock in order to gain access to the ore body There are five steps in development mining removing previously blasted material muck out round drilling the rock face loading...

  • CN203321565U
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    The utility model provides an air purifying refrigeration system for a mine-used lifesaving cabin which comprises a refrigerating device an electrical control box and a temperature sensor as well as an air purifying cabinet and an ice storage cabinet wherein both the refrigerating device and the temperature sensor are electrically connected with the electrical control box an evaporator is...

  • MINERAL EXPLORATION AND MINE DEVELOPMENT
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    development and mining Potential profit however arguably is higher for any particular grassroots project in the sense that the discovery of a large mineral deposit can literally re-make a mining company and be an essential source of its profitability for years or decad The later a company enters the supply chain the less likely it is to...

  • Developments in the engineering of refrigeration
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    Jan 01 1984 0183 32 Developments in the engineering of refrigeration installations for cooling mines J van der Walt and E M de Kock Key words mines cooling engineering Evolution dans la conception des installations frigorifiques pour le refroidissement des mines Au cours des derni res ann es a t sp cialement raise en vidence la n cessit de r duire la consommation d lectricit pour le...

  • DYNAMIC OPTIMISATION OF DEEP
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    mining is transferred to holding dams where it is distributed throughout the mine according to demand A simplified illustration of the refrigeration concept in deep-level mines can be seen in Figure 1 Figure 1 Refrigeration concept in deep-level mines 11 23 Role of refrigeration in deep-level mining...

  • Cooling underground mines with ice
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    Cooling underground mines with ice Posted by Matrix on 19th November 2015 Setting new standards for health safety and energy-e 173 fficiency Pierre Brisset of KTI-Plersch Kältetechnik explains how ice cooling can enable sustainable productivity gains and profit consolidation...

  • SUPPORT IN UNDERGROUND HARD ROCK MINES
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    Support in Hard rock Underground Mines 5 With the development of grouted or friction anchored dowels which are both economical and simple to install the use of untensioned dowels has become very wide-spread in mining and will probably become the dominant rock reinforcement technique in years to come Grouted cables...

  • The Application of Refrigeration in Mechanised Mines
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    Nixon 1997 South Africa is by far the largest user of mine refrigeration with over 300 refrigeration machines installed This paper discusses the key design issues associated with the application of refrigeration in underground metal or coal min Whilst the emphasis is...

  • UNDERGROUND ENVIRONMENTAL CHALLENGES IN DEEP
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    Platinum mines in the Bushveld Complex are located in areas with a high geothermal gradient This means that compared to for example gold mines of the Witwatersrand region high rock temperatures are encountered at relatively shallower depths Thus air cooling and refrigeration need to be considered at early stages in mine development...

  • Underground Mining Risk Assessment
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    1 Ground control Rock bursts underground 475 066 450 050 2138 3 Ground control Loose rock at the face continues to kill and injure workers UG 425 097 463 048 1968 4 Ground control Existing underground mines in Ontario are becoming deeper and incurring higher extraction ratios...

  • Cooling underground mines with ice
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    KTI-Plersch explains the productivity gains of using ice instead of water as a means for cooling underground mines South African mines are some of the deepest in the world Underground Mining >Development...

  • Air cycle refrigeration system for cooling deep mines
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    Mar 01 1988 0183 32 Most refrigeration plants for cooling mines use cold water This is becoming uneconomical as mines get deeper and pumping costs increase This Paper proposes an air cycle refrigeration system for use in deep mines to provide underground refrigeration without the use of...

  • Current Developments and Challenges of Underground Mine
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    The mining industry has experienced a dramatic change over the past 20 years in terms of methods and equipment as well as human resource polici These changes have had impacts on the design of mine ventilation systems Although feasible developments have been implemented to some extent in some other areas ventilation planning still requires further improvements to provide a healthy work...

  • Kraft Finds Underground Cave
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    Feb 28 2011 0183 32 Two years ago Kraft Foods nearly doubled the size of a refrigerated warehouse it operates in Springfield Missouri But visitors to the site would likely have a tough time finding it The 400 000-square-foot facility is located 100 feet below street level in an underground limestone mine called Springfield Underground...

  • Underground Mines Mine Development DMC Mining Services
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    We offer a full spectrum of underground mine services from mine development to design and construction services and contract mining expertise Our teams are skilled in managing complex projects of all sizes in many different regions and geological conditions...

  • Current Developments and Challenges of Underground
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    The first use of artificial cooling for underground mines goes back to 1860s when heat control was done by transporting blocks of ice underground in ore cars However the earliest use of vapour compression refrigeration was in 1921 to cool an underground mine at a depth of about 2400 m at the Morro Velho mine in Brazil McPherson 2012...

  • Underground Mine Development
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    mining methods 3 Mine Development and Design Mine development must proceed considering all aspects of mine design Extreme care must be taken in decisions because of the complexity and cost involved and the most crucial matters include a Mining method selection Once underground mining method is selected then selecting the exploitation method...

  • Developments in the engineering of refrigeration
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    Jan 01 1984 0183 32 Various methods for reducing the amount of cooling water circulated underground in mines has also been looked at These requirements have led to several developments such as cooling of the ventilation air on surface the use of energy recovery devices refrigeration machines for producing water close to 0 176 C and currently consideration is being...

  • CHAPTER 18 REFRIGERATION PLANT AND MINE AIR
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    Chapter 18 Refrigeration Plant and Mine Air Conditioning Systems Malcolm J McPherson 18- 2 181 INTRODUCTION One of the earliest methods of temperature control in underground mines was the importation of naturally produced ice from the surface Blocks of...

  • Mine Cooling Gordon Brothers Industries Pty Ltd Insights
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    Mar 02 2017 0183 32 Chilling of water or production of ice at the surface for use in underground bulk air coolers can be an option or so too can the installation of substantial refrigeration equipment underground as is the case in many South African min There are two main refrigeration systems that can provide the refrigeration required by the bulk air coolers...

  • Guidance about underground air quality and ventilation
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    Ventilation plans for underground min The manager of an underground mine must ensure that a plan of the ventilation system at the mine is kept at the mine that shows the direction course and volume of air currents and the position of all air doors stoppings fans regulators and ventilating devices in the mine...

  • Refrigeration plant and mine air conditioning systems
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    The vapour compression refrigeration cycle currently the most widespread method of artificial cooling appears to have first been used in mining during the 1920s Examples included the famous Morro Velho Mine in Brazil 1923 and experimental work in British coal mines Hancock 1926...

  • Development and testing of an underground remote
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    Development and testing of an underground remote refrigeration plant DJ STANTON Mining Services Consultant Anglo Platinun The objective of this study was to develop install and test a small underground mobile refrigeration plant MRP to deal with some of the real problems associated with mine cooling in an operating mine...

  • PDF Developments in underground hardrock mine ventilation
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    Underground coal mining is by far the most important source of fugitive mine methane and approximately 70 of all coal mining related emissions are from underground ventilation air...

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