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  • SME
    Construction Of A TBM Launch Box In A Complex Urban Environment

    By Vincent Tirolo

    The proposed Second Avenue Subway is a new two-track subway line running from 125th Street and Park Avenue at the north, east along 125th Street to Second Avenue and south along Second Avenue to the F

    Jan 1, 2013

  • SME
    Industrial Minerals 1995

    The United States continued to depend on imported bauxite during 1995. Domestic bauxite mine production remained at about the same level as in 1994. It amounted to less than 1% of total world produc

    Jan 1, 1996

  • SME
    Phased Approach to Stormwater Tunnel Rehabilitation

    By Todd Wanless

    This paper addresses the challenges experienced by the designer and three government agencies during implementation of major improvements for the Turkey Creek Tunnel in Kansas City, Kansas. The tunnel

    Jan 1, 2008

  • SME
    Enhancement of a Process Flowsheet for Recovering and Concentrating Critical Materials from Bituminous Coal Sources Mining, Metallurgy and Exploration (2cb05380-838b-438b-903d-9a26c1191012)

    By A. Noble, R. Q. Honaker, J. Werner

    Recovery of rare earth elements (REE) from coal-related resources has recently received significant interest due to supply concerns and their key roles in critical industries and defense-related techn

  • SME
    Enhancement of a Process Flowsheet for Recovering and Concentrating Critical Materials from Bituminous Coal Sources Mining, Metallurgy and Exploration

    By A. Noble, R. Q. Honaker, J. Werner

    Recovery of rare earth elements (REE) from coal-related resources has recently received significant interest due to supply concerns and their key roles in critical industries and defense-related techn

  • SME
    Characterization Of Copper Flotation Products Utilzing The JKMRC/FEI Mineral Liberation Analyzer (MLA)

    By D. Brosnahan, J. Gathje

    Newmont Metallurgical Services (NMS) recently acquired a Scanning Electron Microscope (SEM) with a JKMRC/FEI Mineral Liberation Analyzer (MLA). With the MLA software package, raw particle image and X

    Jan 1, 2007

  • SME
    2009 Permeation Test Results For Grouts Made With Ultrafine Cements

    By Raymond W. Henn

    The 30th annual short course ?Grouting Fundamentals and Current Practice? was held at the Colorado School of Mines, June 22-26, 2009. The field demonstration portion of the course was conducted June 2

    Jan 1, 2009

  • SME
    Daniel Island Surprise?Sand Lens Lurking In Cooper MARL, Charleston, SC

    By Ray Brainard

    Charleston Water System?s Daniel Island Extension Tunnel, initially thought to be the simplest of the four replacement tunnels to design and build, became the most challenging after the discovery of a

  • SME
    Ventilation efficiency is it cost effective?

    The efficiency of a coal mine ventilation circuit is usually measured by the ratio of the sum of the face quantities divided by the quantity supplied by the fans. Other types of systems use the power

    Jan 1, 2009

  • SME
    Settlements Due to Blasting Vibrations

    By Werner Bilfinger, Claudio Nahas, Marcelo Waimberg

    "INTRODUCTION The so called Porto Maravilha Project consists of the re-urbanization of a 500 ha area in the Rio de Janeiro port region. Several changes in local infrastructure are being implemented, i

    Jan 1, 2016

  • SME
    The Rib-In-Roc Pre-Reinforcement System For Large Underground Openings

    By Bengt L. Stillborg

    INTRODUCTION This paper summarizes the result of a two and a half year research program. The objective of the research was to develop a fundamental understanding of the Rib-in-Roc method. Through t

    Jan 1, 1979

  • SME
    Mining and Metals Industry Structure and Interaction with the Circular Economy

    "INTRODUCTION In recent years, there has been increasing focus on environmental and social impacts of the extractive industries, climate change and resource scarcity. The concept of the circular econo

    Jan 1, 2018

  • SME
    A Case Study of Geological Characterization of Co-rich Ferromanganese Crusts over a Giant Guyot "Takuyo No.5," the Northwestern Pacific

    By H. Sato, B. Thornton, K. Nishi, A. Usui

    "Northwestern Pacific submarine seamounts are believed to be future marine mining areas of ferromanganese crusts, which contain hi-tech industrial metals, such as Co, Ni, Te, Ti, Pt, and REEs. The Tak

    Sep 1, 2014

  • SME
    Lead and Zinc

    By P. Raffinot, C. H. G. Bushell, S. Hodgson, E. F. Milner, H. J. Bosshardt, N. Draper, D. E. Pickett, Edwin T. McKnight, J. Prieto

    Zinc ranks third and lead fourth in world nonferrous metal conumption. In 1972 the free world consumed 3,333,000 mt of refined lead and 4,422,000 mt of refined zinc. The lead tonnage was divided into

    Jan 1, 1985

  • SME
    Construction of I-90 Highway Tunnels Under Boston’s South Station Rail Yard by Box Jacking

    By Peter van Dijk, Gary Almeraris, Philip Rice

    This paper describes the Contractor’s value engineering design and the construction of the Interstate I-90 highway tunnel sections under the South Station railroad yard in Boston, MA for the Central A

    Jan 1, 2001

  • SME
    Morenci’s In-pit Crushing and Conveying System

    By William M. Dowall

    The recently completed in-pit crushing and conveying project at Phelps Dodge's Morenci Mine is rated among the world's leading materials handling projects. The operation involves the crushin

    Jan 1, 1993

  • SME
    Final Tunnel Liner At The Mill Creek 3 Project

    By M. Schafer

    The 6-m- (20-ft-) diameter cast-in-place tunnel lining for Phase 3 of the Mill Creek Tunnel (MCT3) has been completed. This article summarizes aspects of liner design and ad-dresses the construction a

    Jan 1, 2008

  • SME
    A Critical Overview of Dithiophosphinate and Dithiophosphate Interactions with Base Metal Sulfides and Precious Metals Mining, Metallurgy and Exploration

    By D. R. Nagaraj, Napoleon Tercero, Raymond Farinato

    Historically, as for most reagents used in flotation, the wide-spread use of dialkyl dithiophosphinates as collectors in practical applications has preceded a detailed scientific understanding of how

  • SME
    An Innovation In Machine Tunneling

    By J. Donovan Jacobs

    Many improvements in the art of underground excavation have appeared during the past two decades. These improvements have been both in methods and in machinery and have resulted in more economical con

    Jan 1, 1974

  • SME
    Longwall Mining, Shale Gas Production, and Underground Miner Safety and Health

    This paper presents the results of a unique study conducted by the National Institute for Occupational Safety and Health (NIOSH) from 2016 to 2019 to evaluate the effects of longwall-induced subsurfac

    Jan 7, 2020