Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Noise abatement of pneumatic rock drill.

Authors
Summers-CR; Murphy-JN
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7998, 1974 Dec; :1-45
NIOSHTIC No.
10000217
Abstract
In response to the Coal Mine Health and Safety Act of 1969, mandatory noise standards have been developed that specify time- noise limits of mine personnel exposure. Most affected by elevated noise levels is the pneumatic roof bolter operator, both in terms of levels near or in excess of 115 dba and in terms of length of exposure. Therefore, the principal emphasis of this Bureau of Mines report is on pneumatic drill noise control. It is not the intent of this report to suggest any drill redesign; instead, methods are suggested to reduce the noise level by complementing existing machines. An integral muffler system and a separate muffler system were tested in an attempt to lower pneumatic drill noise levels. Pneumatic drills, when new, operate at about 115 dba when drilling in sandstone. Using the drill muffler systems, it was possible to decrease the noise level of a 115-dba stope drill to approximately 100 dba.
Keywords
Mining-industry; Mining-equipment; Noise; Noise-exposure; Noise-levels; Noise-sources; Power-tools; Pneumatic-tools; Pneumatic-equipment; Engineering-controls; Control-technology
Publication Date
19741201
Document Type
IH; Report of Investigations
Fiscal Year
1975
NTIS Accession No.
PB-240095
NTIS Price
A03
Identifying No.
RI-7998
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7998
State
PA
TOP