Details:

Personal Author:
Mark, C. ; Compton, C. S. ; Dolinar, D. R. ; Oyler, D. C.
Mark, C. ; Compton, C. S. ; Dolinar, D. R. ; Oyler, D. C. Less -
Corporate Authors:
National Institute for Occupational Safety and Health.
Conference Authors:
Society for Mining, Metallurgy, and Exploration (U.S.) Annual Meeting (2003 February 24-26 : Cincinnati, Ohio)
Description:
More than 80% of U.S. roof bolts are fully-grouted, but about 1500 roof falls are reported each year. Anchorage failure of a fully grouted bolt can occur when the roof is active near the top of the hole. This paper reports on an extensive series of short-encapsulation pull tests (in which the bolts are installed with only 1 ft of resin) that were conducted in the National Institute for Occupational Safety and Health (NIOSH) Mine Safety Research Laboratory and operating mines in WV and PA. The tests confirmed that poor anchorage can been countered under some weak rock conditions. Suggestions for improving anchorage are included.
Subject:
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Mining

Source:
2003 SME Annual Meeting, Feb 24-26, Cincinnati, Ohio, preprint 03-138. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2003 Feb; :1-8
Document Type:
Book Chapter
Genre:
Conference Publications
Collection(s):
National Institute for Occupational Safety and Health
Main Document Checksum:
[+]
urn:sha256:8947127806efe041b4c66d0d42c4b7a6f0bbaf667013a18d8b5160abe6a9b63e
File Type:

Supporting Files

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