Results 1 - 10 of 33

• 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.
• NIOSH Jupiter II Wide Area Light
  5/9/2019 - Blueprints
  NIOSH developed the Jupiter II Wide Area Light to mount on mining machines or illuminate a working area.
• Improved NIOSH Collapsible Drill Steel Enclosure (CDSE) Prototype Helps Reduce Roof Bolting Drilling Noise
  11/15/2018 - Research areas
  Read about a NIOSH-developed noise control technology that reduces noise emissions when drilling holes during roof bolting.
• Dust Control by Air-blocking Shelves and Dust Collector-to-Bailing Airflow Ratios for a Surface Mine Drill Shroud
  5/17/2018 - Peer reviewed journal articles
  A study using computational fluid dynamics (CFD) models to examine the effects of air-blocking shelves on airflows and respirable dust distribution associated with medium-sized surface blasthole drill shrouds as part of a dry dust collector system.
• Development of a Mine Rescue Drilling System and Robotics Mission Feasibility Study
  7/18/2016 - Interagency agreements
  An interagency agreement to conduct experiments to improve the efficiency and speed of drilling operations and develop robots and robotic assist technology.
• Rapid Rescue Drilling Equipment Transferred to National Mine Health and Safety Academy
  6/16/2015 - News and announcements
  A feature story about the transfer of rapid rescue drilling equipment to the National Mine Health and Safety Academy.
• Evaluations of Bit Sleeve and Twisted-Body Bit Designs for Controlling Roof Bolter Dust
  2/1/2015 - Peer reviewed journal articles
  A paper detailing the use of a bit sleeve in combination with a dusthog-type bit to improve dust extraction during the critical initial phase of drilling.
• 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.
• 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.
• 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.