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  • SME
    MADIQ Tunnel, Lebanon: TBM Tunneling Vs. Karst Geology

    By William D. Leech

    Lebanon used a TBM for the firsttime to excavate a tunnel in the country. A main beam TBM, built in 1979, bored the 3.8 m (12.5-ft) diameter by 4,020 m (2.5-miles) Madiq Tunnel. The TBM bored through

  • SME
    Coal Dust Wettability: It?s Role In Dust Control And Its Determination

    By K. Mondal

    A macroscopic approach integrated with microscopic analyses for wettability characterization is presented. Wetting depends on 1) Contact between the dust and the fluid droplets, 2) Wettability of the

    Jan 1, 2012

  • SME
    Development of Steel-Fiber Reinforced High Fluidity Concrete Segment and Application to Construction

    By Aki Fujii, Hiroshi Dobashi, Mitsuro Matsuda, Yoshinari Kondo

    INTRODUCTION The Metropolitan Expressway Central Circular Route with a total length of approximately 47 km is located outside the Inner Circular Route of Tokyo (at a radius of approximately 8 km f

    Jan 1, 2007

  • SME
    Shield Tunneling in Pure Sands - Merging the Application Fields of EPB and Slurry Shield Technologies

    By Carlos Henrique Turolla Maia, Ulrich Maidl, Marc Comulada, Julio Claudio Di Dio Pierri

    "Pure sands are typically the domain of slurry shields due to their high permeability and their granular characteristics. However, the Earth Pressure Balanced (EPB) shield machine technology has advan

    Jan 1, 2016

  • SME
    Using Steel Fibers to Reinforce Final Shotcrete Linings

    By Thomas Schwind, Pamela S. Moran

    For short tunnels, a reinforced cast-in-place lining is not economical and shotcreteis a logical substitution. In the past, reinforced shotcrete linings have been constructed with lattice girders and

    Jan 1, 2005

  • SME
    Liner System Protects Oils Sands’ Tailings Area

    Syncrude Canada produces a large part of Canada’s crude oil supply. The company processes about 225,000 bbl/day. The oil produced is used for jet and automobile fuel, home heating oil, plastics and

    Jan 1, 2000

  • SME
    Spectroelectrochemistry Of Enargite I: Reactivity In Alkaline Solutions

    By R. N. Gow

    The presence of enargite (Cu3AsS4) is problematic in gold processing because it is environmentally hazardous due to its arsenic content but also because it is double refractory causing both cyanide an

    Feb 27, 2013

  • SME
    Microtunneling For Utilities Under Harold Railroad Interlocking

    By William Reininger

    Microtunneling provides a necessary solution for multiple utility crossings associated with the New York Metropolitan Transportation Authority Capital Construction Company?s (MTACC) Eastside Access Pr

  • SME
    Long-Term Trends in Copper Prices

    By John E. Tilton

    Real copper prices during the past several decades display two striking characteristics. First, they are highly volatile. Within a year or two, copper prices can rise or fall by 30% or more. Second

    Jan 1, 2002

  • SME
    American College Tunnels in Athens, Greece—Design and Construction of Very Large Diameter Tunnels in Rock

    By S. Schina

    Part of the Imittos Western Peripheral Motorway in Athens is the twin road tunnel in the vicinity of American College, with 20m excavation diameter. In the paper, the environmental and other requireme

    Jan 1, 2001

  • SME
    A 4.75m Contractor Manufactured EPB Machine

    By Bruce Richardson

    A contractor-manufactured 4.75m (15'-7") diameter EPB shield excavated a 115m (375 ft) long tunnel under the San Antonio River as part of the Salado Creek to Dos Rios Pipeline Interconnect Projec

    Jan 1, 2008

  • SME
    New Test Methodology For Estimating The Abrasiveness Of Soils For TBM Tunneling

    By F. Dahl, P. Raleigh, J. Holzhauser, B. Nilsen

    Tunnel excavation using tunnel boring machines (TBMs), has become increasingly common in recent years, despite the fact that precise evaluation of certain risks have not kept pace with the use of thes

    Jan 1, 2007

  • SME
    WMATA Use Of The New Austrian Tunneling Method For Lining And Support

    By Larry H. Heflin

    The Washington Metropolitan Area Transit Authority's Wheaton Station and tunnel design was completed and offered for bid in the Spring of 1983. The format was unique to the Authority: a four part

    Jan 1, 1985

  • SME
    Caterpillar With Tunnel Boom Boosts Productivity On Swiss Project

    A dedicated tunnel construction version of the Caterpillar 328D LCR compact radius excavator is proving highly productive on the A9 Autoroute construction project near Visp, in Switzerland. It is the

    Jan 1, 2009

  • SME
    How To Optimize The Water Usage At The Whole Operation In 4 Key Steps

    By G. Tiravanti

    A recurrent concern in mining operations is how to deal with the large volumes of fresh water used which in turn generates large volumes of effluents that have to be treated. Water treatment can focus

    Feb 27, 2013

  • SME
    Development Of An Energy-Balance Model To Predict The Economic Impact Of Installing A Tailings Wash Thickener At The Fort Knox Mine, Fairbanks, Alaska

    By J. T. Hollow

    The Fort Knox Mine is located in Alaska?s interior, where the average ambient air temperatures range from -24°C (-11°F) in January to 16°C (61°F) in July. The mill processes a free-milling gold ore ut

    Jan 1, 2007

  • SME
    Construction Works Of Large-Section Vertically Parallel Twin Tunnels In Close Proximity

    By Kentaro Kuraji

    INTRODUCTION Background Tokyo, the capital of Japan, is one of the largest cities of the world. As many as 33 million people live in Tokyo and three neighboring prefectures although the city occupi

  • SME
    Design And Development Of A Mobile Mining Machine

    By G. L. Dollinger, J. P. Kindsvater, J. A. Gibson

    DESIGN AND DEVELOPMENT OF A MOBILE MINING MACHINE INTRODUCTION Until recently, developing tunnels in hard rock has been accomplished either by the drill and blast method or by using large tunnel bo

    Jan 1, 1985

  • SME
    An Investigation Into The Use Of Backfill Zones And Yielding Pillars For Subsidence Control

    By Keith A. Heasley, Lee W. Saperstein

    This paper investigates the use of backfill zones and yielding pillars for subsidence control. The investigation begins by choosing an appropriate subsidence predictive technique to simulate the propo

    Jan 1, 1986

  • SME
    Responsible coal sourcing - taking the next step

    By R. Strandahl

    As one of the largest private utilities globally, E.ON currently operates hard coal fired power stations in with a total installed capacity of some 20.000 MW: These thermal power plants consume domest

    Jan 1, 2011