Results 111 - 120 of 137

• Material Properties Affecting the Stability of a 50-Year-Old Rock Dump in an Active Mine
  12/1/1999 - Reports of Investigations
  Material properties affecting slope stability were measured in a large 50-year-old, partially consolidated rock dump located in an active open-pit mine. Field tests included single-ring infiltration and density.
• Coal Mine Subsidence Prediction Using a Boundary-Element Program
  3/1/1999 - Conference papers
  This paper presents several case studies in which a mechanics-based boundary-element program is used to back-calculate the surface subsidence associated with various panels at several northern Appalachian coal mines.
• Neural Network Technology for Strata Strength Characterization
  1/1/1999 - Conference papers
  The process of drilling and bolting the roof is currently one of the most dangerous jobs in underground mining, resulting in about 1,000 accidents with injuries each year in the United States. To increase the safety of underground miners, researchers f...
• Analysis of the Interaction Between Mobile Roof Supports and Mine Strata
  11/1/1998 - Conference papers
  To provide a better understanding of the mechanics of strata deformation, the authors have collected and reviewed measurements of convergence and stress in one western U.S. mine and have completed modeling for two typical pillar-pulling plans.
• Advances in Remote Sensing Techniques for Monitoring Rock Falls and Slope Failures
  8/1/1998 - Conference papers
  This paper describes the potential adaption of systems such as interferometric synthetic aperture radar, imaging spectroscopy, and time-domain reflectometry, to slope monitoring and design.
• A Static Fatigue Constitutive Law for Joints in Weak Rock
  4/1/1998 - Conference papers
  Researchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) are developing numerical modeling tools to forecast time-dependent deformation around coal mine entries.
• Simplified Pre- and Post-Processing Technique for Performing Finite-Element Analyses of Deep Underground Mines
  8/1/1997 - Conference papers
  Demonstration of a technique developed at the Spokane Research Center that allows the user to create a finite-element model of a two-dimensional section of an underground mine in a relatively straightforward manner.
• 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...
• 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.
• In Situ Stress at the Lucky Friday Mine (In Four Parts): 3. Reanalysis of Overcore Measurements from the Star Mine
  7/1/1995 - Reports of Investigations
  U.S. Bureau of Mines researchers reviewed an in situ stress estimate developed from measurements of overcore strain taken at test sites on the 7300 and 7500 levels of the Star Mine near Mullan, ID. Although the field measurements of overcoring strain we...