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  • Surface miners drive up savings in coal mining
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    Aug 28 2018 0183 32 Mining with Wirtgen surface miners produces level surfaces that serve as stable roadways supporting the rapid transport of material This increases the transport capacity of...

  • Wirtgen Trademark Detail Zauba Corp
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    Trademark Applicant Wirtgen Application Date 2010-03-31 Status Registered Goods and Services Description Consultancy management and conducting of structural and civil engineering projects in particular road building projects mining and surface mining projects and projects for treatment and crushing of rock material ore gravel and recycling material rental sale and...

  • Overburden
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    The overburden depth at the test site is about 600 ft Fig 924 shows the detailed overburden geology at the test site which has been interpreted by correlating a test site gamma log and a nearby core hole Clearly the overburden geology is a typical Pittsburgh seam geology and is highlighted by many strong and weak rock interfaces which have been demonstrated to have major influences on...

  • Wirtgen Surface Mining Maximising coal recovery by
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    Jul 29 2016 0183 32 Johannesburg 29 July 2016 The global leader in mobile machine solutions for road construction and rehabilitation as well as mining and mineral processing has recently conducted several large-scale field tests on material degradation Findings confirm that Wirtgen surface miners offer significant advantages in the reduction of contamination experienced in normal open cast...

  • Kombajn frezujący Wirtgen
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    Mining of material without blasting and/or selectively becomes more and more important for high quality ROM-products Surface Miners have been developed especially for this purpose The experience from more than 180 machines sold and countless test- and rental operations has been incorporated into a new machine concept...

  • Surface miners to take over mining landscape in South Africa
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    Wirtgen surface miners are crawler-mounted mining machines with a rotating drum for rock penetration mounted at the centre of gravity This configuration ensures that the full weight of the miner...

  • Surface miners drive up savings in coal mining
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    Wirtgen supplies surface miners in a variety of performance classes for the selective mining of commodities such as coal limestone bauxite gypsum salt and phosphate In addition to mining these machines can also carry out routing operations for constructing roads and railway tracks rehabilitating roadways and installing tunnel floors...

  • PDF Surface Miners Evaluation of the Production Rate
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    The performance of surface miners can be judged better by utilizing the combination of intact rock and rock mass parameters available machine specifications and operating conditions...

  • STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1
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    STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 INTRODUCTION 2 TESTING OF INTACT ROCK FOR STRENGTH 21 Uniaxial Compression 22 Point Load Testing 23 Uniaxial Tension 24 Indirect Tension Tests 25 Shear Tests 26 Confined Compression Tests Triaxial Tests 27 Biaxial and Multiaxial Tests 28 Other Tests 3 PARAMETERS AFFECTING ROCK STRENGTH 4...

  • Surface Mining Methods and Equipment
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    2 Surface Mining Machinery Glossary Bibliography Biographical Sketches Summary This chapter deals with surface mining Section 1 presents an overview of surface mining methods and practices as commonly employe d in modern surface mining operations The description includes a comparison of the advantages and disadvantages of surface and...

  • Surface Subsidence Prediction Method for Coal Mines with
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    Considering the potential influences of the surface landform and streams a surface subsidence observation line was deployed along the dip of the second panel to observe surface subsidence as shown in Figure 1After the mining of the 204 204 205 and 204 205 206 working surfaces the measured maximum surface subsidence was 0248 1194 and 1925 m respectively...

  • The Size Distribution and Calorific Value Regulation
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    The Wirtgen 2500SM surface miner was delivered to AS Eesti Energia Kaevandused former AS Eesti Põlevkivi at the end of 2006 Test results The results of testing and size distribution of oil- where rock soils could be transformed into zones with agricultural capaciti...

  • Millrock Reports Assay Results From Drilling and Surface
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    Jan 18 2021 0183 32 Millrock Reports Assay Results From Drilling and Surface Rock Sampling at West Pogo and Eagle Blocks 64North Project Alaska its plans to test the new Sunrise prospect with a...

  • New WIRTGEN Surface Miners for Raw Material Extraction and
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    The new Wirtgen 220 SM/220 SMi surface miner is extremely versatile With a cutting width of 22 m and a cutting depth of up to 300 mm the 708 kW powerhouse is used for the selective extraction of raw materials up to a uniaxial compressive strength of 50 MPa as well as for routing operations and infrastructure projects...

  • Section III Surface Gravel
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    getting good test results from a lab Poor sampling techniques have led to more controversy in aggregate testing than any other factor Every effort must be made to make sure that the sample brought to a lab is truly representative of the material in the fieldIt is wise to follow national standards such as The Benefit of Testing Aggregates 41...

  • surface miner wirtgen testing results rocks philippines
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    surface miner wirtgen testing results rocks philippin Testing Services SGS Testing Services As a world leader in testing we offer over 140 years experience providing a broad range of services to clients around the globe Our global network of laboratories and testing facilities staffed by knowledgeable and experienced personnel help...

  • Examining Minerals and Rocks
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    a rock such as grain size shape and arrangement Igneous rocks that crystallize slowly beneath the Earth s surface typically have visible individual minerals Extrusive igneous rocks tend to cool much more rapidly and the minerals grow quicker and can not...

  • Wirtgen Surface Mining Maximizing coal recovery by
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    Wirtgen surface miners A Wirtgen surface miner is a crawler-mounted mining machine with a rotating cutting drum for rock penetration mounted at the center of gravity This ensures that the full machine weight of the miner can be transformed into rock penetration force...

  • Rock Creek Montana Sapphires A New Age of Mining Begins
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    Aug 19 2016 0183 32 Results from ground magnetometer survey also hint that there might be mafic igneous rocks below the surface All observations and test results make Dr Barron confident that there are still plenty of sapphires on the property The old-time miners worked mainly on the gulches since they had to mine hydraulically the lower the area the easier...

  • Mining in Estonia Oil shale mining in Estonia Surface
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    Being the biggest Wirtgen surface miner it is capable of mining up to 12 million tonnes per year in soft rock Comparative testing of the mining methods The use of Wirtgen surface miners in Estonia allowed a direct comparison to be drawn between surface mining and the conventional mining processes of drilling and blasting and semi-selective...

  • Wirtgen surface miner technology maximises output at India
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    Surface miner technology also eliminates the need to close the mine for blasting which delays production In addition mine operators no longer need to spend time obtaining the required permits hiring certified blasters or compiling the associated documentation Mining with Wirtgen surface miners also offers considerable financial benefits...

  • MainPump The smallest Surface Miner from Wirtgen
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    11052007 The smallest Surface Miner from Wirtgen The smallest Surface Miner from Wirtgen The modular design of Wirtgen`s smallest Surface Miner with a cutting width of 220 m and a cutting depth of up to 30 cm is its biggest advantage in practice the machine can be used as a classical Surface Miner in mining operations and converted into a high-performance road milling machine thus...

  • Surface Miners Evaluation of the Production Rate and
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    Mar 06 2013 0183 32 The purpose of this research was to evaluate the production rate PR and cutting performance of surface miners SM based on rock properties and specific energy SE We use data from equipment manufacturers and experimental data in this study and propose a new method and equations to determine both the PR and the cutting speed of SM The unconfined compressive strength UCS of the rock...

  • International Journal of Rock Mechanics and Mining
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    This journal is concerned with original research new developments site measurements and case studies in rock mechanics and rock engineeringIt provides an international forum for the publication of high quality papers on the subject of rock mechanics and the application of rock mechanics principles and techniques to mining and civil engineering projects built on or in rock mass...

  • Rock excavation using surface miners An overview of some
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    Jan 01 2013 0183 32 About 19 Wirtgen surface miners of various sizes and capacities have been deployed in different collieries of MCL CCL and SCCL More than 100 surface miners are being used in coal and limestone mines of India The surface miner Wirtgen make-1900SM was used for the first time in India in 1994 at a limestone quarry of GACL...

  • PDF Power rating of surface miners in relation to rock
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    A significant factor in the successful application of surface miner is the ability to utilize the machine power to its optimum during rock cutting which will lead to improved productivity and...

  • Rock excavation using surface miners An overview of some
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    Ten numbers of surface miner of 2200 SM model Wirtgen make are in operation at the Gevra mine Chhattisgarh India and apart from coal mines this model is also widely deployed in limestone min...

  • Revolutionary Wirtgen surface miner
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    Apr 12 2017 0183 32 A Wirtgen surface miner is a crawler-mounted mining machine with a rotating cutting drum for rock penetration mounted at the centre of gravity In the coal mining industry the breakage of coal occurs throughout production from extraction at the face to end use...

  • Wirtgen SM replacing conventional methods
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    The first Wirtgen 2200 SM 38 surface miner is being used in the Chinese province of Xinjiang With immediate effect this newly advanced surface miner has replaced the conventional mining equipment used locally Wirtgen experts are providing support for the project...

  • Technical Document Acid Mine Drainage Prediction
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    the largest environmental problem facing the US mining industry US Forest Service 1993 Ferguson and Erickson 1988 Lapakko 1993b Commonly referred to as acid rock drainage ARD or acid mine drainage AMD acid drainage from mine waste rock tailings and mine structures such as...

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