Results 191 - 200 of 220

• Temporal Imaging of Mine-Induced Stress Change Using Seismic Tomography
  1/1/1997 - Peer reviewed journal articles
  In an effort aimed at monitoring mining-induced stress changes that may influence ground failure, the U.S. Bureau of Mines conducted a series of active 3-D seismic tomographic surveys at the Homestake (Lead, South Dakota) and Lucky Friday (Mullen, Idaho...
• Ignition Tests With a Fiber-Optic Powered Instrument
  9/1/1996 - Conference papers
  New types of industrial instruments use fiber-coupled laser energy to power remote sensors. The U.S. Bureau of Mines began an investigation of laser-powered fiber-optic instruments in explosive atmospheres in support of the standard-making process.
• An Electromagnetic Spatial/Spectral Sensor for Geological Measurements
  9/1/1996 - Conference papers
  The U.S. Department of Energy Pittsburgh Research Center, has developed and field tested a spatial, spectral sensor for measuring the thickness of mineral deposits.
• Continuous Respirable Mine Dust Monitor Development
  8/1/1996 - Conference papers
  In response to an MSHA task group recommendation, the National Institute for Occupational Safety and Health (NIOSH), Pittsburgh Research Center, initiated the development of a fixed-site machine-mounted continuous respirable dust monitor.
• Status of a Tapered Element, Oscillation Microbalance-Based Continuous Respirable Coal Mine Dust Monitor
  1/1/1996 - Peer reviewed journal articles
  In response to the Mine Safety and Health Administration's request, the U.S. Bureau of Mines investigated several sensor technologies for continuously monitoring respirable coal mine dust. One of these technologies is the tapered element, oscillating m...
• A 20-Liter Furnace Test Method to Determine the Combustion Gas Toxicity of Conveyor Belts
  1/1/1996 - Reports of Investigations
  Pittsburgh Research Center conducted experiments with mine conveyor belt samples in a 20-L furnace and in a laboratory fire tunnel to measure and compare the major toxic gas concentrations evolved during the combustion of the materials.
• Comparative In-Mine Evaluation of Carbon Monoxide and Smoke Detectors
  1/1/1996 - Reports of Investigations
  An evaluation of the comparative responses of five types of commercially available smoke detectors and a diffusion-mode CO detector under normal and reduced airflow conditions.
• Using Ground Penetrating Radar for Roof Hazard Detection in Underground Mines
  1/1/1996 - Reports of Investigations
  Ground penetrating radar (GPR) has been investigated by NIOSH for its potential to determine roof hazards in underground mines. GPR surveys were conducted at four field sites with accompanying ground truth to evaluate GPR for roof hazard detection.
• Evaluation of Smoke Detectors for Mining Use
  1/1/1995 - Reports of Investigations
  The U.S. Bureau of Mines has constructed a smoke chamber and developed sensitivity tests for smoke detectors. Evaluation of six smoke detectors showed their potential for use as mine fire sensors or as part of a mine atmospheric monitoring system.
• A Comparison of Mine Fire Sensors
  1/1/1995 - Reports of Investigations
  A report on research to determine the alarm times of smoke and carbon monoxide sensors and a point type heat sensor to slowly developing coal-conveyor belt fires.