NIOSHTIC-2 Publications Search

Optimum design of roof truss installations based on bending strain energy.

Authors
Mangelsdorf CP
Source
Rock mechanics: proceedings of the 28th U.S. Symposium on Rock Mechanics, June 29 - July 1, 1987, Tucson, Arizona. Farmer IW, Dacmen JJK, Desai CS, Neuman SP, eds. Boston, MA: A. A. Balkema, 1987 Jun; :1115-1122
NIOSHTIC No.
10005551
Abstract
Questions asked by mine operators about the installation of roof trusses frequently deal with optimum position, slope and initial tension of the inclined chords. The purpose of this paper is to examine the effects of those chord parameters on the strain energy of bending and to offer optimum values which will minimize the strain energy of the immediate roof. The method of solution involves calculating strain energy in bending for a roof beam partially supported by a roof truss. The beam is treated as homogeneous and isotropic. The strain energy Contours are then plotted as functions of the truss uplift force and its position. Approximate optimum conditions can usually be achieved without specific knowledge of the material properties of the roof. The results are compared with current practice.
Keywords
Mining; Mining engineering; Roof support systems; Roof supports; Roofing; Structural design; Structural engineering; Slope stability; Force; Mining industry; Rock mechanics; Engineering controls
Publication Date
19870629
Document Type
OP; Conference/Symposia Proceedings
Editors
Farmer IW; Dacmen JJK; Desai CS; Neuman SP
Fiscal Year
1987
ISBN No.
9789061916994
Identifying No.
OP 176-92
NIOSH Division
PRC
Source Name
Rock mechanics: proceedings of the 28th U.S. Symposium on Rock Mechanics, June 29 - July 1, 1987, Tucson, Arizona
State
PA; AZ
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division