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An Investigation of the Interaction of Rock and Types of Rock Bolts for Selected Loading Conditions.

Authors
Haas-CJ; Davis-RL; Keith-HD; Et Al
Source
For Reference Only At Bureau Libraries :398 pages
Link
NIOSHTIC No.
10000848
Abstract
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.
Publication Date
19760101
Document Type
CP; Final Contract Report;
Fiscal Year
1976
NTIS Accession No.
NTIS Price
Identifying No.
OFR 51-80
NIOSH Division
SRC;
Source Name
For Reference Only At Bureau Libraries
State
MO;
Performing Organization
University of Missouri-Rolla
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