Results 11 - 20 of 270

• Assessing the Impact of Safety Climate Constructs on Worker Performance in the Mining Industry
  4/8/2020 - Reports of Investigations
  See how findings on mineworker perceptions about safety climate can help companies develop improved health and safety management systems.
• Assessing the Methane Hazard of Gassy Coals in Storage Silos
  1/1/1981 - Reports of Investigations
  The Bureau of Mines investigated coal storage silos to determine how gassy coal must be for methane accumulations in a silo to become hazardous and where such accumulations are likely to occur. Methane concentrations were measured in the open space abov...
• Assessment of Airborne Dust Generated From Small Truck-Mounted Rock Drills
  1/1/1995 - Reports of Investigations
  Dust control modifications were implemented on small, truck-mounted rock drills at surface coal mines. The control techniques showed noticeable improvement in measured dust concentrations around the drills.
• Assessment of Methane Hazards in an Anomalous Zone of a Gulf Coast Salt Dome
  1/1/1984 - Reports of Investigations
  This Bureau of Mines research study found gas emission rates from an advancing face, and flows and pressure of gas from an exploration drill hole were dependent upon the geology of salt encountered in a domal salt mine. This information suggests a great...
• Behavior of Simulated Longwall Gob Material
  1/1/1993 - Reports of Investigations
  This report presents results of a U.S. Bureau of Mines study of longwall gob material. The objective of this work was to determine material stiffness properties of the gob for use in numerical models or rock mass response to longwall mining.
• 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...
• Bleeder System in Virgin Area in a Pittsburgh Coalbed Mine
  1/1/1973 - Reports of Investigations
  Air quantity-pressure and methane concentration surveys were conducted in accessible portions of an area being pillared in a Pittsburgh coalbed mine in West Virginia.
• Calculation of Vertical Stress Exerted by Topographic Features
  1/1/1992 - Reports of Investigations
  The Bureau of Mines developed a computerized method to calculate vertical stress exerted on surfaces at depth that includes the effect or topography. The limitation of the method is that stresses cannot be accurately determined near an outcrop.
• Canopy and Base Load Distribution on a Longwall Shield
  1/1/1992 - Reports of Investigations
  Roof and floor contact pressure provided by the interaction of a shield with the surrounding strata are examined. Controlled forces were applied to an 800-ton two-leg shield using a mine roof simulator.
• 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.