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  • NIOSH
    OFR-74-75 Economic Engineering Analysis Of U.S. Surface Coal Mines And Effective Land Reclamation ? Executive Summary

    Fossil fuel consumption in the United States increased markedly over recent years, and future demands expect to be even greater. Coal, this Nation's most plentiful natural fossil fuel, will play

    Jan 1, 1975

  • SME
    Steel-Fiber Reinforced Self-Compacting Concrete on the San Vicente Aqueduct Tunnel

    By C. D. Hebert, M. R. King

    The 56,000' (17 km) long San Vicente Aqueduct Pipeline tunnel is being constructed using precast concrete rings to act as preliminary ground support through two sections of the bored tunnel with

    Jan 1, 2007

  • SME
    Factors in the Variability of Measured Surface Settlements over EPB Driven Tunnels in Soft Clay

    By S. Boone, J. N. Shirlaw

    INTRODUCTION Soft, near normally consolidated clays generally provide ideal conditions for tunneling using Earth Pressure Balance (EPB) shields. It is easy to turn the clay into a low permeability,

    Jan 1, 2007

  • SME
    Rockworks Earthapps - A Free Collection Of 74 Programs Forcreating Geologically-Related Diagrams Within Google Earth

    By J. Reed

    The RockWorks EarthApps represent a free collection of 74 geology-related programs that read data from a built-in datasheet and create diagrams within Google Earth. EarthApps also includes programs th

    Feb 27, 2013

  • NIOSH
    A New Series Of Bureau Of Mines Reports Announced

    A new series of reports called ?Mineral Perspectives" (MP's) has been initiated by the Bureau of Mines with the publication of MP-1 titled, "Far East and South Asia" by K.P. Wang and the staff of

    Jan 1, 1977

  • NIOSH
    OFR-135-77 Multilift Longwall Mining Methods For Thick Coal Design And Feasibility

    By John Wilson

    This report describes the performance of Phase I of a project to design, analyze, and demonstrate a multilift longwall mining method applicable to mining coal seams twelve (12) feet or more in thickne

    Jan 1, 1976

  • NIOSH
    Mineral Indicators - Aluminum: (34aea1b0-8707-476d-a608-b15875f18c04)

    During the period January 1, 1977 through July 31, 1977, 5 percent (264,000 tons) of U.S. capacity was closed due to power curtailments in the Pacific Northwest because of the shortage of water. Durin

    Jan 1, 1977

  • SME
    Characterization And Upgrading Of Fine Sillimanite Ore Using Wide-Angle Dense-Medium Cycloning

    By A. A. Sadegh

    A laboratory investigation was carried out on the characterization and beneficiation of sillimanite ore. Petrographic analysis indicated that the ore consisted of massive elongated sillimanite grains

    Jan 1, 2007

  • NIOSH
    OFR-108-77 The Effect Of Organizational Climate And Policy On Coal Mine Safety

    By Mark S. Sanders

    The present study was designed to explore the contribution of organizational climate and management practices to the injury experience in underground coal mines. A cross-lagged panel design was used i

    Jan 1, 1976

  • NIOSH
    RI 4465 The "Carbon-Oxygen Complex" As A Possible Initiator Of Explosions And Formation Of Carbon Monoxide In Compressed-Air Systems

    By H. W. Busch

    In the course of examinations by representatives of the Bureau of Mines of several compressed-air systems in which explosions had occurred, samples were obtained of the carbon deposits that are formed

    Jan 1, 1949

  • AIME
    Industrial Minerals - Resources and Utilization of North Carolina Pyrophyllite

    By Jasper L. Stuckey

    PYROPHYLLITE, first identified as soapstone,' later as agalmatolite,2 and finally as pyrophyl-lite, has been known to occur in North Carolina for more than 130 years and has been produced intermi

    Jan 1, 1959

  • AUSIMM
    Biogeochemical Prospecting for Zinc and Lead in the Te Aroha Region of New Zealand

    The uptake of zinc, lead, and copper by the flora of the Tui Base Mine area near Te Aroha is described.Vegetation and soil samples were taken from two traverses across the Raukaka Lode. Results. after

    Jan 1, 1969

  • NIOSH
    RI 3905 Mica and Beryl Examination and Exploration in Cleburne, Randolph, Clay, Coosa, Chilton, Tallapoosa, and Lee Counties, Ala.

    By Staff

    "INTRODUCTION Sheet mica is one of the most important minerals in modern industry. It is used in many kinds of electrical devices, and up to the present time no satisfactory substitute for it has been

    Aug 1, 1946

  • NIOSH
    OFR-54-81 Improving Surface Coal Refuse Disposal Site Inspections

    By R. A. Meister

    The study on improving surface coat refuse disposal site inspections included surface inspections of 15 refuse disposal sites. Monthly aerial photos were taken of the sites and computer methods were u

    Jan 1, 1980

  • NIOSH
    OFR-27-89 Proceedings Of The 23rd International Conference Of Safety In Mines Research Institutes ? Session I ? Mines Fires ? Review Paper: Mine Fires

    By A. F. Roberts

    The subject of mine fires is a very wide one. To give reasonable coherency, the paper concentrates on the behaviour of fires in the ventilated airways of mines; spontaneous combustions are not conside

    Jan 1, 1989

  • SME
    NATM Through Clean Sands—The Michigan Street Experience

    By Mohamed A. Younis, Paul J. Headland, Paul H. Madsen, Vojtech Gall

    INTRODUCTION A 100 ft long, 20 ft high and 18 ft wide NATM tunnel was excavated through grouted clean sands beneath a busy city street, including a variety of existing utility lines. The new tunnel

    Jan 1, 2007

  • NIOSH
    OFR-121-77 Longwall Ignition Suppression

    By Ronald D. Rothchild

    This report describes the results of a study of longwall ignition hazards and specific suppression systems to minimize each of the major hazards. The major ignition hazards were identified by conducti

    Jan 1, 1976

  • TMS
    An Efficient Method of Stirring Melt With a Modulated Traveling Magnetic Field

    By Xiaodong Wang

    A liquid metal flow generated by a magnetic field whose traveling direction is periodically reversed, the Reversed Traveling Magnetic Field (R-TMF) is studied. The modulation frequency ranges from 0 t

    Jan 1, 2009

  • NIOSH
    The National Economy In The Third Quarter

    By Keith L. Harris

    The U.S. economy continued to grow moderately in the third quarter, but at a slightly higher rate than in the previous quarter. According to the Department of Commerce's preliminary estimate, rea

    Jan 1, 1985

  • SME
    Innovative Mining Systems For Low-Cost Production In Very Thick Alluvial Deposits

    By G. Goellner

    The thick alluvial sand and gravel deposits along the base of the San Gabriel mountain range in Southern California area have been mined for construction aggregates for over 100 years. Encroachment of

    Jan 1, 2004