Results 201 - 210 of 646

• Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
  10/1/2007 - Conference papers
  This paper evaluates the duty cycle of a typical roof bolting machine operation at two coal mines. The results provide insight into which portion of the operators’ duty cycle is the most prominent contributor to noise exposure.
• Determining Underground Roof Bolting Machine Operators Noise Exposure Using Laboratory Results
  10/1/2007 - Conference papers
  This paper provides a method for predicting sound pressure levels at the operator’s position of a roof bolting machine in an underground coal mine using sound power levels determined in the laboratory.
• Using Laser Absorption Techniques to Monitor Diesel Particulate Matter Exposure in Underground Stone Mines
  10/1/2007 - Conference papers
  This paper describes research into a laser absorption technique that enables one to measure elemental carbon concentration in diesel particulate matter in near real time.
• 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.
• Examination of Diesel Aftertreatment Systems at NIOSH Lake Lynn Laboratory
  10/1/2007 - Conference papers
  A paper describing tests conducted in the NIOSH Diesel Laboratory at the Lake Lynn Laboratory experimental mine, a facility developed to allow evaluation of control technologies directly in an underground environment.
• Application of a Microphone Phased Array to Identify Noise Sources on a Roof Bolting Machine
  10/1/2007 - Conference papers
  This paper discusses the methods NIOSH used to identify noise sources on a roof bolting machine while drilling.
• Visual Performance for Incandescent and Solid-State Cap Lamps in an Underground Mining Environment
  9/1/2007 - Conference papers
  The objective of this research was to determine if there were visual performance improvements in an underground mining environment when using solid-state cap lamps with light emitting diodes (LEDs) as compared to incandescent light bulbs commonly used i...
• Remote Vision System for Dozers on Coal Stockpiles
  9/1/2007 - Conference papers
  NIOSH participated in an experiment to facilitate the remote control of dozers used on coal stockpiles. The normal sensory cues an operator requires to manipulate the dozer from a remote location were supplemented, such as with a vision system.
• Explosion Prevention in United States Coal Mines
  9/1/2007 - Conference papers
  This paper discusses methods for protecting U.S. underground coal mines from explosions of methane gas and coal dust, and presents new research, such as the Coal Dust Explosibility Meter, a handheld device to directly measure coal dust explosibility.
• Dust Control Practices for Underground Coal Mining
  9/1/2007 - Conference papers
  This paper summarizes existing dust control technologies routinely being used in underground coal mine operations, and provides a review of new controls that are being pursued.