Results 161 - 170 of 259

• Technology News 465 - Method for Predicting Methane Emissions on Extended Longwall Faces
  11/1/1997 - Technology News
  A method is described for allowing operators to predict methane emissions from panels with increased face width.
• Control and Monitoring of Gas in Blind Auger Headings
  2/1/1997 - Conference papers
  Deeper surface mining and deeper highwall penetration depths have lead to more frequent encounters with methane gas. While this coal is remotely mined from the surface, underground ignitions of methane have propagated to the surface and injured miners. ...
• Impact of Unbalanced Intake and Scrubber Flows on Face Methane Concentrations
  2/1/1997 - Conference papers
  Research was conducted to investigate how ventilation of a mining face is affected when scrubber flow is greater or less than intake flow.
• A Technique for Measuring Toxic Gases Produced by Blasting Agents
  1/1/1997 - Conference papers
  Traditional techniques to experimentally determine toxic fumes produced by detonating high explosives are not applicable to blasting agents. To detonate properly, blasting agents require confinement, a significant booster, and other parameters.
• 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.
• Technology News 448 - Improving the Performance of Longwall Gob Gas Ventholes
  3/1/1995 - Technology News
  The absence of fundamental scientific and engineering principles in the design and placement of gob gas ventholes can cause difficulties for mine operators when gas emissions increase because of a change in mine design or because variable geologic condi...
• 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.
• Detection and Control of Spontaneous Heating in Coal Mine Pillars-A Case Study
  1/1/1995 - Reports of Investigations
  This U.S. Bureau of Mines study examined spontaneous heating episodes in coal mine pillars in an active underground coal mine. The objective of this study was to discover if the location of future events of pillar spontaneous heating could be inferred ...
• Evaluation of Alternative Placement of Longwall Gob Gas Ventholes for Optimum Performance
  1/1/1994 - Reports of Investigations
  Production trends were analyzed for 82 gob gas ventholes on 7 longwall panels in the Lower Kittanning Coalbed, Pennsylvania.
• Evaluation of Catalyzed Diesel Particulate Filters Used in an Underground Metal Mine
  1/1/1993 - Reports of Investigations
  Catalyzed diesel particulate filters (CDPFs) reduce the concentration of diesel particulate matter (DPM) and may reduce the emissions of carbon monoxide (CO) and hydrocarbons (HC) in diesel exhaust.