Results 31 - 40 of 73

• Noise Source Identification on a Continuous Mining Machine
  7/1/2008 - Conference papers
  In the Hemi-anechoic chamber of the Pittsburgh Research Laboratory noise source identification on a continuous miner was performed using phased array measurements and a frequency domain beamforming algorithm with Diagonal Removal.
• Pillar Strength and Design Methodology for Stone Mines
  7/1/2008 - Conference papers
  This paper presents a pillar design methodology that was developed from a study of pillar performance in operating stone mines and concludes with guidelines for applying a developed equation and selecting appropriate input parameters.
• Continuous Mining Machine Conveyor System Sound Power Levels
  7/1/2008 - Conference papers
  This paper describes the results of different chain types and configurations installed on a continuous mining machine conveyor system and the resulting sound power levels.
• Field Observations and Numerical Studies of Horizontal Stress Effects on Roof Stability in U.S. Limestone Mines
  6/1/2008 - Peer reviewed journal articles
  This paper describes a modeling approach that can be used as a tool to evaluate potential roof failure and optimize the stability of room and pillar layouts.
• Effect of Operator Position on the Incidence of Continuous Mining Machine/Worker Collisions
  10/1/2007 - Conference papers
  This investigation analyzes factors influencing struck-by accidents during tramming of a continuous mining machine using digital human model simulations with a variety of subjects, postures, environmental constraints, and machine characteristics.
• Roof Stability Issues in Underground Limestone Mines in the United States
  7/1/2007 - Conference papers
  This paper presents the results of a study of roof conditions in 34 limestone mines in the Eastern and Midwestern U.S.
• Multiple-Seam Mining Interactions: Case Histories from the Harris No. 1 Mine
  5/1/2007 - Conference papers, Information Circulars
  A detailed evaluation of the multiple-seam experiences at Harris No. 1 Mine was done as part of NIOSH's nationwide multiple-seam mining case history database.
• Underground Evaluation of Coated Flight Bars for a Continuous Mining Machine
  12/1/2006 - Conference papers
  A highly durable polyurethane coating has been developed for chain flights to decrease noise from metal-on-metal impacts. This paper evaluates this engineering noise control in reducing the noise exposure of continuous mining machine operators.
• Pillar Stability Issues Based on a Survey of Pillar Performance in Underground Limestone Mines
  8/1/2006 - Conference papers
  A survey of pillar conditions was carried out at 21 operating limestone mines that use the room-and-pillar method. Pillar instability is most likely caused by unfavorable geological structures in pillars with width to height ratios of less than 1.5.
• Emerging Technologies Control Respirable Dust Exposures for Continuous Mining and Roof Bolting Personnel
  6/1/2006 - Conference papers
  This paper discusses NIOSH studies evaluating the impacts of emerging technologies that may reduce dust exposures for continuous mining and roof bolting personnel. These technologies include use of a wet-head cutting drum on a continuous mining machine,...