Results 21 - 30 of 85

• Rapid Response Rescue Drilling System Development for Mine Rescue Application
  8/15/2014 - Contracts and cooperative agreements
  A contract to identify equipment needs, available contractors, and the development and demonstration process for a rapid response drilling system for mine rescue operations.
• Directional Control-Response Compatibility Relationships Assessed by Physical Simulation of an Underground Bolting Machine
  3/1/2014 - Peer reviewed journal articles
  A study conducted to examine the pattern of direction errors made during the manipulation of a physical simulation of an underground coal mine bolting machine to assess directional control-response compatibility relationships.
• Visual feedback system to reduce errors while operating roof bolting machines
  2/1/2013 - Peer reviewed journal articles
  An experiment was conducted to explore coding and directional compatibility on roof bolting equipment and to determine the feasibility of a visual feedback system to alert operators of critical movements and workers in close proximity to the equipment.
• Evaluations of a noise control for roof bolting machines
  12/1/2012 - Non-peer reviewed journal articles
  This paper reports results of field tests of the device conducted at five underground coal mines. Noise reduction was assessed by comparing the operator’s noise exposure during drilling with and without the drill bit isolator.
• Development of a canopy air curtain to reduce roof bolters' dust exposure
  7/1/2012 - Peer reviewed journal articles
  This experimentally designed air curtain, adapted for roof bolting machines used in this study, is based upon previous design prototypes, computational fluid dynamics (CFD) simulations and trial-and-error testing.
• The Evolution of Drill Bit and Chuck Isolators to Reduce Roof Bolting Machine Drilling Noise
  1/1/2012 - Peer reviewed journal articles
  This paper documents the evolution of the bit isolator and chuck isolator. Laboratory testing confirms that production bit and chuck isolators reduce the A-weighted sound level generated during drilling by 3.7 to 6.6 dB.
• Reducing Control Selection Errors Associated with Underground Bolting Equipment
  7/1/2010 - Peer reviewed journal articles
  The aims of this research were to determine the effectiveness of arbitrary shape coding in reducing selection error rates in a virtual analogy of roof-bolting and whether any advantages exist for mirror or place layouts for dual control situations.
• Respirable Quartz Hazard Associated with Coal Mine Roof Bolter Dust
  6/1/2010 - Conference papers
  This study examined the potential for coal mine roof bolter dust to be a source of a worker's exposure to respirable quartz.
• Acoustic Assessment of Pneumatic and Electric Jackleg Drills used in the Mining Industry
  4/1/2010 - Conference papers
  This paper presents an acoustic assessment of pneumatic and electric jackleg drills involving Noise Source Identification (NSID), penetration rate measurements, operator’s cumulative noise dose measurements, and determination of sound power levels.
• Less Sound Underground: Reducing Roof Bolting Machine Drilling Noise
  4/1/2010 - Conference papers
  This article presents the most significant findings from NIOSH research to develop noise controls that reduce the sound at the operator’s position of mining machinery.