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  • SME
    Underground Mine Air and Strata Temperature Change Due to the Use of Refuge Alternatives

    By M. A. Reyes, L. Yan

    Heat and humidity buildup within refuge alternatives (RAs) may expose occupants to physiological hazards such as heat stress. The Mine Safety and Health Administration (MSHA) regulations require RAs i

    Nov 22, 2019

  • SME
    Safe Slot Hole Excavation With A New Boxhole Boring Machine - Introduction

    By W. Burger

    In underground mines worldwide, a large number of short and small diameter slot holes need to be excavated. Herrenknecht has developed and built a new boxholeboring machine based on the well-proven Mi

    Jan 1, 2012

  • SME
    Designing To Protect Adjacent Structures During Tunneling In An Urban Environment

    By Marco D. Boscardin, Paul A. Roy, Kevin J. DiRocco, Andy J. Miller

    The North Shore Connector Project for the Port Authority of Allegheny County involves TBM mining a pair of subway tunnels through soil and rock under the Allegheny River and a narrow city street. Alon

    Jan 1, 2007

  • 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
    How To Increase Plant Performance With Artificial Intelligence And Expert Systems - Preprint 09-074

    By L. B. Hales

    Expert control of grinding and flotation plants has been successfully used in the minerals industry since the 1970?s. The earliest of these systems were written in a hard-coded fashion in FORTRAN, BAS

    Jan 1, 2009

  • SME
    Review And Applicability Of Yielding Support Systems For Bump Prone Coal Mines In The Western United States - Preprint 09-027

    In bump-prone coal mines, roof and rib support is subject to dynamic as well as static loading. Although less frequently encountered, the dynamic loading component can result in violent coal expulsio

    Jan 1, 2009

  • SME
    Inland Steel Uses Technology, Cost Control, and Employee Involvement to Improve Its Productivity

    By Samuel A. Reipas

    Introduction The ore mining industry has been successful because of technological progress and huge sums of capital investment. But new technology and plants have not come cheap. The problem now is c

    Jan 11, 1983

  • SME
    New Discoveries at the Red Dog Zinc-Lead Deposit

    By S. Jennings

    The Red Dog zinc-lead-silver deposit is located in the DeLong Mountains of the western Brooks Range in northwest Alaska. The region is located 145 km(90 miles) north of the village of Kotzebue (Fig.

    Jan 1, 1999

  • SME
    New Developments In The Recovery Of Copper, Cobalt, Zinc And Manganese In The Boleo Process

    Baja Mining is currently constructing the Boleo metallurgical plant in Santa Rosalia, Mexico to recover copper, cobalt, zinc and possibly manganese products from the Boleo ore. The process involves a

    Jan 1, 2012

  • SME
    Nitrogen Inertization At San Juan Coal Company’s Longwall Operation

    By Jacques F. Abrahamse, Kevin A. Bahe, T. Arthur Palm, Gregory E. McCluskey, Stephen L. Bessinger

    Introduction Basis For System San Juan Coal Company (SJCC) is a subsidiary of BHP Billiton. Until recently, BHP Billiton operated three surface mines in northwestern New Mexico: Navajo, San Juan,

    Jan 1, 2005

  • SME
    Observational Method Using Real Time Surface Settlement Monitoring On The South Toulon Tunnel Project - Introduction - Project History

    By B. C. Vargas

    The Toulon tunnel project is a key component of the Highway corridor on the French Riviera between Marseille and Nice and is a fundamental transportation infrastructure for the region. The first desig

    Jan 1, 2012

  • 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
    Model And Experimental Study Of The Effect Of Impeller Rotational Speed On The Flotation Rate From A Small-Scale Flotation Cell - Implications For The Effect Of Bubble Velocity

    A series of flotation experiments were carried out in a 2.25-dm3 laboratory-scale Rushton turbine cell using hydrophobic quartz particles. Flotation was performed at a constant mean bubble diameter ov

    Jan 1, 2007

  • SME
    Prediction of Ground Vibration Induced Due to Single Hole Blast Using Explicit Dynamics Mining, Metallurgy and Exploration (5745d634-e632-4178-ad6f-441932595fe2)

    By R. K. Sinha, B. S. Choudhary, Desh Deepak, A. K. Mishra, Hemant Agrawal, Shankar Kumar

    There are several methods (empirical, statistical, and machine learning tools) to calculate blast-induced ground vibration. Still, due to complications in the blasting procedure, under varying blastin

  • SME
    A Survey Of Mine Ventilation Practices ? Introduction

    By Pierre Mousset-Jones

    A questionnaire was sent out to three classes of mines to determine the extent of the heat problem in U.S. and Foreign underground mines. The following list shows the replies received from this questi

    Jan 1, 1986

  • SME
    Old Mines ? New Regulations: The re-opening of the Gordonsville, Elmwood, and Cumberland Mines under new DPM regulations

    By A. Adu-Acheampong

    The Mid-Tennessee Zinc (MTZ) mines, comprised of the Gordonsville, Elmwood, and Cumberland sites, last operated 4 years ago and are undergoing rehabilitation to begin production in 2008. The mines uti

    Jan 1, 2009

  • SME
    Tunnel Boring at Stillwater’s East Boulder Project

    By Clayr Alexander

    Stillwater Mining Co. (SMC) is engaged in developing, extracting, processing and refining palladium, platinum and associated metals (PGM)from the J-M Reef. This geological formation is located in Sti

    Jan 1, 1999

  • SME
    The mineralogy of marine Fe-Mn oxides and consequences for the extraction of metals

    By Thomas Kuhn, Carsten Ruehlemann, Christina Heller, Anna Wegorzewski

    The commercial extraction of metals from manganese nodules on an industrial scale requires more than 50% of the investment necessary to realize manganese nodule mining. This is mainly due to the fact

    Sep 1, 2014

  • SME
    Hydro-Jex© Operations At Anglogold Ashanti?s Cripple Creek & Victor Gold Mine

    By T. Seal

    Hydro-Jex© releaching was undertaken during the summer of 2010 at the Valley Leach Facility (VLF) at AngloGold Ashanti?s Cripple Creek & Victor Gold Mine. Several advancements to the technique were m

    Jan 1, 2011

  • SME
    The Influence of a Continuous Mining Machine and Roof/Rib Mesh on Magnetic Proximity Detection Systems Mining, Metallurgy and Exploration

    By Jacob Carr, Christopher C. Jobes, Chenming Zhou, LaTasha R. Swanson, Jennica Bellanca, Jingcheng Li

    Magnetic proximity detection systems (PDSs) are used with continuous mining machines (CMMs) to protect miners from striking and pinning accidents. Generators are used in a PDS to create magnetic field