Results 1 - 5 of 5

• An Approach to Identifying Geological Properties from Roof Bolter Drilling Parameters
  8/1/2000 - Conference papers
  Rock drilling parameters including thrust, rotational speed, torque and velocity were examined to determine the ability to identify the strength of the rocks being drilled from the measured parameters.
• Coal Mine Geology in the U.S. Coal Fields: a State-of-the-art
  8/1/2006 - Conference papers
  Describes the procedures and thought processes used by coal mine geologists when determining various mineability and reserve extraction feasibility issues. The paper also address underground geologic hazard mapping and prediction techniques.
• Spatial Trends in Rock Strength - Can They Be Determined From Coreholes?
  8/1/2004 - Conference papers
  Average UCS may differ between coreholes but not be statistically significant, and widely spaced coreholes may be able to identify valid spatial trends in rock strength. The paper describes NIOSH's extensive investigation into these issues.
• Shear Mechanism for Mining-Induced Fractures Applied to Rock Mechanics of Coal Mines
  8/1/2002 - Conference papers
  Two examples of an echelon mining-induced fractures seen in hard-rock mines provided a basis for inferring that fracture zones and bedding plane sap rations immediately surrounding mine openings are promoted by oblique shear into the openings.
• Pillar Mechanics of Coal Mine Bursts: A Control Strategy
  9/1/1995 - Conference papers
  In this study, data available for a range of U.S. bursts were considered in an effort to evaluate both common and distinctive features of coal mine bursts.