Results 101 - 110 of 150

• Analysis of Underground Coal Mine Fire Incidents in the United States from 1978 through 1992
  1/1/1995 - Information Circulars
  An analysis of 164 underground coal mine fire incidents occurring in the United States during the 15 years from 1978 through 1992.
• Evaluation of Several Natural Gamma Radiation Systems - a Preliminary Study
  1/1/1995 - Information Circulars
  To help evaluate the usefulness of the natural gamma radiation (NGR) technique for the coal interface detection (CID) project, the U.S. Bureau of Mines (USBM) collected data from various mining companies conducting underground and surface operations.
• Bleederless Ventilation Systems as a Spontaneous Combustion Control Measure in U.S. Coal Mines
  1/1/1994 - Information Circulars
  The U.S. Bureau of Mines conducted a worldwide literature review of bleederless ventilation practices to evaluate their use as a spontaneous combustion control measure in U.S. coal mines. This report describes the types of ventilation systems used throu...
• Smoke, Carbon Monoxide, and Hydrogen Chloride Production from the Pyrolysis of Conveyor Belting and Brattice Cloth
  1/1/1992 - Information Circulars
  An investigation of the combustion products of typical materials found in underground mines. The results are combined with previous analyses to estimate relative toxicities, product levels and detectability of smoldering mine combustibles.
• Analysis and Design Considerations for Superimposed Longwall Gate Roads
  1/1/1992 - Information Circulars
  A U.S. Bureau of Mines investigation of longwall panel layouts to maximize coal recovery and minimize interactive problems in multiple-seam operations.
• The Availability of Primary Copper in Market Economy Countries: A Minerals Availability Appraisal
  1/1/1992 - Information Circulars
  A U.S. Bureau of Mines study on the potential availability of copper from 204 mines and deposits in market economy countries.
• MULSIM/NL Application and Practitioner's Manual
  1/1/1992 - Information Circulars
  MULSIM/NL is a U.S. Bureau of Mines boundary-element-method program for calculating stresses and displacements in coal mines or thin, tabular metalliferous veins. This manual gives detailed operating instructions for MULSIM/NL and illustrates its use w...
• MULSIM/NL Theoretical and Programmer's Manual
  1/1/1992 - Information Circulars
  The program described in this U.S. Bureau of Mines report is part of the MULSIM/NL package, which features the actual BEM program described herein, as well as a preprocessor program called MULPRE/NL and a plotting postprocessor program called MULPLT/NL.
• In-Mine Evaluation of Smoke Detectors
  1/1/1992 - Information Circulars
  An report on the evaluation of smoke detectors placed in conveyor belt entries of underground coal mines. Recommendations for performance standards, sensitivity tests, detector classification and maintenance are also presented.
• Rib Stability: Practical Considerations to Optimize Rib Design
  1/1/1992 - Information Circulars
  Reviews the mechanics of rib failure and the relationship of coal mine geology and pillar constraint to rib instability. Strategies for choosing an effective method of rib support are considered and various rib support methods are discussed.