Results 131 - 140 of 270

• Bending Fatigue Tests 2 and 3 on 2-Inch 6x25 Fiber Core Wire Rope
  1/1/1992 - Reports of Investigations
  The U.S. Bureau of Mines established a wire rope research laboratory to examine the factors that affect the life of wire rope. The tests indicated that once a wire rope nears the end of its service life, both deterioration and the consequent loss of ro...
• Teleoperation of a Highwall Mining System
  1/1/1992 - Reports of Investigations
  The U.S. Bureau of Mines developed and tested a teleoperating system to control a new highwall mining system. Surface and production testing proved that the teleoperating system supplied the operator with sufficient sensory information to operate the m...
• Cause of Floor Self-Heatings in an Underground Coal Mine
  1/1/1992 - Reports of Investigations
  This report presents a Bureau of Mines study to identify the causes of self-heating events beneath the floor of a deep underground coal mine. The combined results led to the conclusion that pyrite oxidation was the prime cause of the heatings.
• Mine Fire Diagnostics Applied to the Carbondale, PA Mine Fire Site
  1/1/1992 - Reports of Investigations
  The U.S. Bureau of Mines applied its mine fire diagnostic method to an abandoned anthracite mine fire site in Carbondale, Lackawanna County, PA.
• Predicting Materials' Ease of Combustion: Development of a Simple Test Method
  1/1/1992 - Reports of Investigations
  The Bureau of Mines conducted experiments for predicting materials' ease of combustion (smoldering onset, smoldering, flaming, and decomposition rates) by means of sub micrometer smoke particle characteristics of the development of a simple test method.
• Accuracy and Precision of Microseismic Event Locations in Rock Burst Research Studies
  1/1/1992 - Reports of Investigations
  Stability analyses of fractured and faulted rock masses require delineation of the position, extent, and orientation of geologic discontinuities. Recommendations are made for increasing the accuracy of locations of microseismic events detected.
• Underground Test Results of a Laser-Based Tram Control System for a Continuous Miner
  1/1/1992 - Reports of Investigations
  This report documents the status of a laser-based underground guidance system for tracking and controlling the movements of underground mobile mining equipment.
• Development and Testing of a Computer-Assisted Remote-Control System for the Compact Loader-Trammer
  1/1/1992 - Reports of Investigations
  A prototype mucking machine designed to operate in narrow-vein stopes was developed by Foster-Miller, Inc., Waltham, MA, under contract with the U.S. Bureau of Mines. To correct deficiencies of the tether-remote-control system, a computer-based, radio-...
• Transfer of Self-Contained Self-Rescuer Donning Skills Under Similar Conditions of Practice: The Draeger OXY-SR60B and the CSE SR-100
  1/1/1992 - Reports of Investigations
  The purpose of this U.S. Bureau of Mines study was to assess the ability of trainees to don an unfamiliar self-contained self-rescuer (SCSR) after having become familiar with how to put on a different type of apparatus.
• Delineation of Fractures in Igneous Rock Masses Using Common Offset Radar Reflection
  1/1/1992 - Reports of Investigations
  As part of an investigation aimed at improving the health and safety and competitiveness of the mining industry, the U.S. Bureau of Mines evaluated the application of common offset radar profiling, using a 250-MHz ground-penetrating radar (GPR) system, ...