Results 81 - 90 of 91

• Determination of Physical Properties of Cable Bolts in Cement Grout Pull Tests Using Instrumented King Wires
  4/1/2000 - Conference papers
  Researchers are investigating the physical properties of cable bolts by replacing the conventional king wire with a modified king wire on which strain gauges have been installed.
• Creep Along Weak Planes in Roof and How It Affects Stability
  3/1/2000 - Conference papers
  A NIOSH study of the time-dependent response of rock stressed along weakness planes with the objective to improve mine safety by reducing the number of roof falls that cause injuries and fatalities to miners.
• Miner Mike Saves the Day! or Ground Support... It's Important!
  1/1/2000 - NIOSH/USBM numbered publications, Videos and multimedia
  This video teaches the necessity and use of ground supports.
• Design Methodology for Standing Secondary Roof Support in Longwall Tailgates
  8/1/1999 - Conference papers
  This paper discusses a design methodology for standing secondary tailgate supports, using the performance characteristics generated in the NIOSH Mine Roof Simulator (MRS) to match load characteristics of various supports to ground reaction behavior.
• Preventing Injuries Caused by Unrecognized Stone Mine Roof Beam Failures With a Pro-Active Roof Control Plan
  3/1/1999 - Conference papers
  To help mitigate the potential for falls-of-ground injuries to underground stone miners, NIOSH developed the Roof Monitoring Safety System (RMSS) to aid in monitoring dangerous levels of roof beam deflection.
• An Overview of Geomechanics Safety Research on Mobile Roof Supports
  1/1/1999 - Conference papers
  A study on the mechanics of strata behavior determined through extensive field measurements. Practical techniques for assessing roof behavior were developed along with a prototype remote controlled roof support system.
• 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.
• A Case Study of Bolt Performance in a Two-entry Gate Road
  8/1/1998 - Conference papers
  This paper presents the results of a case study conducted in a two-entry gateroad in a coal mine where excessive roof deformation and bolt loading resulted in failure of many roof supports.
• Technology News 467 - Wood Crib Performance Model
  11/1/1997 - Technology News
  With the increasing cost of wood and greater dependency on wood cribs for support in applications such as longwall tailgate and bleeder entries, more efficient use of wood crib supports is required.
• A Method for the Selection of Rock Support Based on Bolt Loading Measurements
  8/1/1997 - Conference papers
  A method to assist in the evaluation and selection of roof bolts using in situ measurements of roof bolt loading has been developed by researchers of the Spokane Research Center, National Institute for Occupational Safety and Health.