Development and Testing of Self-drilling Roof Bolts.
Kendorski-FS; Singh-SD; Singh-MM
For Reference Only At Bureau Libraries :225 pages
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.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
Engineers International, Inc.