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  • SME
    Elevation Uncertainty Within The Procedure Of Waste Sanitary Landfill Design. An Approach Through The Fuzziness Of Geometry

    By G. A. Achilleos

    The insufficiency of Boolean Logic and ?hard? decision making to represent and manage spatial data in set with their spatial errors comprises a remarkable difficulty for widely accepted estimation pro

    Jan 1, 2005

  • SME
    Rio Algom’s Cerro Colorado Begins Copper Heap-Leach Operation in Chile

    By G. M. Bernard

    Cerro Colorado lies on the eastern edge of the Atacama Desert in the foothills of the Andean Cordillera of northern Chile. Compañía Minera Cerro Colorado SA (CMCC) operates Cerro Colorado. CMCC, h

    Jan 1, 1995

  • SME
    Computer Aided Design System for Long Range Planning in Open Cut Coal Mines

    By Li. S. D., R. X. Zhang, K. M. Li, Y. D. Zhang, Y. J. Hou, S. G. Li

    A computer aided design software system for long range coal surface mine planning has been developed by the authors. The system is composed of two subsystems: a coal deposite sub- system and a long ra

    Jan 1, 1996

  • SME
    Tunnel Construction: Difficult Ground Conditions

    By James J. Brady, James S. Lewis, Robert B. Gordon, Jimmy W. Honeycutt

    INTRODUCTION Tunnel construction has always been an extremely high risk form of contracting primarily due to the inaccessability of information concerning the ground conditions to be encountered du

    Jan 1, 1983

  • SME
    Continuous pilot-scale testing of column flotation for recovery of fine coal

    By J. G. Groppo, B. K. Parekh

    A series of performance studies were conducted using countercurrent column flotation to recover a marketable clean coal product from existing preparation plant fine waste streams. The test work was co

    Jan 1, 1991

  • SME
    Concomitant Backstowing: Potential For Alleviating Concerns Associated With High-Production Longwall Mining

    By M. J. Sanzotti, C. J. Bise

    This paper examines the potential for controlling longwall-induced subsidence by pneumatically backstowing waste rock into the void created by mining. The paper also examines scheduling the process as

    Jan 1, 1997

  • SME
    A Computer System For Metallurgical Plant Optimisation - Introduction

    By S. Kesler

    Rössing Uranium Limited has operated since 1976 a large open pit uranium mine and extraction plant at a remote site in the Namib desert, South West Africa/Namibia. The geology (Berning, I., et al. Eco

    Jan 1, 1986

  • SME
    Prediction And Control Of Dust In Indian Opencast Coal Mines And Their Surrounding Areas

    By S. P. Banerjee

    There has been a phenomenal increase in production of coal from opencast mines in India. At the same time environmental problems caused by mining are receiving greater atttention. Deterioration in amb

    Jan 1, 1991

  • SME
    Immobilization of free ionic gold and L-asparagine-complexed ionic gold by Sporosarcina ureae: The importance of organo-gold complexes in gold mobility

    By W. S. Fyfe, G. Southam, T. J. Beveridge

    Sporosarcina ureae was able to grow in the presence of tip to 10-ppm L-asparagine complexed gold. However, 10 ppm Au3+ was found to be highly toxic to Sporosarcina ureae, killing 109 bacteria/mL withi

    Jan 1, 2000

  • SME
    Predicting Materials Handling Properties Of Tunnel Muck

    By H. F. Haller, H. C. Pattison

    The research program described in this paper is sponsored by the Advanced Research Projects Agency of the Department of Defense and monitored by the Bureau of Mines, United States Department of the In

    Jan 1, 1997

  • SME
    The Fort Lawton Parallel Tunnel Seattle, Washington

    By Brian Fulcher

    The Fort Lawton Parallel Tunnel was built in 1990 - 1991 by Morrison Knudsen Corporation (MK) as an integral part of Seattle METRO's planned expansion of the Westpoint Treatment Plant. The projec

    Jan 1, 1993

  • SME
    Seismic Velocities in Unconsolidated Permafrost

    By F. R. Corwin, M. S. King, R. W. Zimmerman

    A model has been developed to relate the velocities of seismic waves in unconsolidated permafrost to the porosity and the extent of freezing. The permafrost is idealized as an assemblage of spherical

    Jan 1, 1986

  • SME
    Characterization of chain pillar stability in a deep western coal mine - A case study

    By P. H. Lu, M. J. DeMarco, J. R. Koehler

    Beginning in late 1985 and continuing through 1987, US Bureau of Mines personnel investigated longwall chain pillar and entry design in two and three-entry gateroad systems at a deep underground coal

    Jan 1, 1987

  • SME
    Preliminary Investigations at Gold Mountain, Utah using an Interactive Data Base

    By Munson R. McKinney, Bryan A. Slim

    To date some 1,000 exploration targets (by way of adits, mine dumps, shafts, outcrops and unstoped mine areas) have so far been identified using an interactive data base system to query a digital data

    Jan 1, 1987

  • SME
    Controlling Underground Coal Mine Methane Safety Hazards Through Vertical and Horizontal Degasification Operations

    By Ronald C. Bethard, Kenneth W. Ely

    The liberation of methane during underground coal mining causes serious safety concerns. During a mining cycle, with mechanized mining equipment, thousands of cubic feet of methane are released from c

    Jan 1, 1989

  • SME
    Watershed approach to evaluating impacts of abandoned mines in the Bear Butte Creek basin of the Black Hills

    By A. D. Davis, C. J. Webb, T. V. Durkin

    This project took a watershed approach in the evaluation of water-quality impacts from past mining activities and current restoration projects in the Bear Butte Creek basin, a small and well-defined d

    Jan 1, 2000

  • SME
    Operation Of A Bio-Oxidation Pilot Plant On A Refractory Gold Concentrate

    By J. T. Sitarski, R. C. Emmett, L. W. Luinstra, R. P. Klepper

    A mining operation in Zimbabwe produces a pyritic gold concentrate that requires oxidative pretreatment prior to cyanidation in order to liberate 80 percent of the gold values. Bio- oxidation offered

    Jan 1, 1990

  • SME
    Study Of Shear-Flocculation Of Silica

    By D. R. Spears, D. A. Stanley

    The US Bureau of Mines investigated the fundamental aspects of shear-flocculation using a rapid, in-situ particle size analyzer. Silica was stirred in the presence of an aliphatic amine to determine t

    Jan 1, 1995

  • SME
    Use Of Ripping To Alleviate Excessive Compaction On Reclaimed Surface Mined Land

    By J. C. Yingling, R. J. Sweigard, P. W. Conrad, J. M. Ringe, D. H. Graves

    Much of the land reclaimed since enactment of the 1977 Surface Mining Control and Reclamation Act is overcompacted. Research has shown that excessive compaction in replaced growing media is detrimenta

    Jan 1, 2003

  • SME
    Computerised Mine Planning System At Rio Tinto Minera, S.A. (Spain)

    By C. J. Savage

    Rio Tinto Minera, S.A. operates in Southern Spain, at one of the most ancient mining sites in the world, using advanced computerised mine planning. This paper describes the development and application

    Jan 1, 1986