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Results 21 - 30 of 82
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.
7/1/2012 - Peer reviewed journal articlesThis 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.
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.
7/1/2010 - Peer reviewed journal articlesThe 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.
6/1/2010 - Conference papersThis study examined the potential for coal mine roof bolter dust to be a source of a worker's exposure to respirable quartz.
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.
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.
NIOSH conducted research to reduce the noise emission of various underground coal-mining equipment and developed a suite of controls to reduce drilling noise.
The paper documents NIOSH research to date of a damped drill steel on a roof bolting machine.
2/1/2010 - Information CircularsThis report describes a study of operator movement relative to the motion of a roof bolting machine boom arm. This work was aimed at reducing the risk of injury to underground coal mine workers from moving machinery.