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Development and Testing of Self-drilling Roof Bolts.

Authors
Kendorski-FS; Singh-SD; Singh-MM
Source
For Reference Only At Bureau Libraries :225 pages
Link
NIOSHTIC No.
10002440
Abstract
This report presents the results of a search for viable roof bolt concepts, detailed development, design, and manufacture of such bolts that drill their own holes. Testing in the laboratory and in the field in two different coal mines of three self-drilling roof bolts is described. Three new types of bolts, a spring-actuated mechanical expansion shell, a slot and wedge, and a self-contained resin anchor bolt, that drill their own holes and then anchor in a continuous operation were designed and tested. Such bolts, when fully developed for mine use, would allow safer and remote installation of ground support and increase productivity.
Publication Date
19790101
Document Type
CP; Final Contract Report;
Fiscal Year
1979
NTIS Accession No.
NTIS Price
Identifying No.
OFR 102-82
NIOSH Division
SRC;
Source Name
For Reference Only At Bureau Libraries
Performing Organization
Engineers International, Inc.
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