An Investigation of the Interaction of Rock and Types of Rock Bolts for Selected Loading Conditions.
Haas-CJ; Davis-RL; Keith-HD; Et Al
For Reference Only At Bureau Libraries :398 pages
This report presents five aspects of the interactions of rock bolts and surrounding rock to support coal mine roofs: (1) a finite element analysis of the bolted mine roof structure including the affects of bedding planes, inclined fractures, lateral stress, and bolt type (expansion anchored and fully grouted). (2) Theoretical and experimental studies of a split-ring forced into an undersize hole (split-set rock bolt) with elastic and plastic solutions. (3) Laboratory shear tests on resin-grouted bolts and split-set tubes with anchors with smooth and rough shear planes in limestone and shale rock. (4) Laboratory creep tests on resin-grouted bars to determine the initial load bleed off, creep under constant axial load, pull out stiffness, and ultimate strength. (5) Field tests with resin-grouted bolts instrumented with strain gages and placed in a coal mine roof. Roof sag stations were also installed in an attempt to relate bolt loading to vertical strata movement.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
University of Missouri-Rolla