Optimum design of roof truss installations based on bending strain energy.
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
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.
Mining; Mining engineering; Roof support systems; Roof supports; Roofing; Structural design; Structural engineering; Slope stability; Force; Mining industry; Rock mechanics; Engineering controls
OP; Conference/Symposia Proceedings
Farmer IW; Dacmen JJK; Desai CS; Neuman SP
Rock mechanics: proceedings of the 28th U.S. Symposium on Rock Mechanics, June 29 - July 1, 1987, Tucson, Arizona