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

Development of Commercial Quiet Rock Drills.

Authors
Dutta-PK; Runstadler-PW Jr.
Source
NTIS: PB 84-232644 Available for Reference At Bureau Libraries :114 pages
Link
NIOSHTIC No.
10004130
Abstract
This report describes the design, development, and manufacture of production stoper drills and the results of their field tests. It is shown that underground stoper drill noise level can be reduced from 118 dba to below 100 dba by using pneumatic drills. The design concept of these drills is a radical departure from the standard valved rifle bar type drill machine design to a drill featuring a valveless independent rotation system, use of an integral muffler, and a shroud tube. Six drills were manufactured in a standard commerical drill manufacturing setup and organization. The design and production technology proved that commercially viable quiet drills can be made available for mine use.
Publication Date
19830101
Document Type
CP; Final Contract Report;
Fiscal Year
1983
NTIS Accession No.
PB84-232644
NTIS Price
A07
Identifying No.
OFR 143-84
NIOSH Division
PRC;
Source Name
NTIS: PB 84-232644. Available for Reference At Bureau Libraries
Performing Organization
Creare Products, Inc.
TOP