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Results 1 - 10 of 33
8/1/2000 - Conference papersRock 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.
Improved NIOSH Collapsible Drill Steel Enclosure (CDSE) Prototype Helps Reduce Roof Bolting Drilling Noise11/15/2018 - Research areasRead about a NIOSH-developed noise control technology that reduces noise emissions when drilling holes during roof bolting.
10/18/2018 - BlueprintsNIOSH developed the Jupiter II Wide Area Light to mount on mining machines or illuminate a working area.
Dust Control by Air-blocking Shelves and Dust Collector-to-Bailing Airflow Ratios for a Surface Mine Drill Shroud5/17/2018 - Peer reviewed journal articlesA 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.
7/18/2016 - Interagency agreementsAn interagency agreement to conduct experiments to improve the efficiency and speed of drilling operations and develop robots and robotic assist technology.
6/16/2015 - News and announcementsA feature story about the transfer of rapid rescue drilling equipment to the National Mine Health and Safety Academy.
2/1/2015 - Peer reviewed journal articlesA 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.
8/15/2014 - Contracts and cooperative agreementsA contract to identify equipment needs, available contractors, and the development and demonstration process for a rapid response drilling system for mine rescue operations.
12/1/2012 - Non-peer reviewed journal articlesThis 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.
1/1/2012 - Peer reviewed journal articlesThis 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.