Ausbautechnische und arbeitsorganisatorische Optimierung eines nach ergonomischen Gesichtspunkten neu konzipierten Streckenausbausystems Schlussbericht

Yielding arch support being used in German mining almost exclusively, more and more comes up against limiting factors. The consequence is lacking strata control, and hence a high rate of accident risk due to late bearing characteristics and, for that reason loosened surrounding rock. In addition to that setting the heavy support components means high physical stress to the heading worker. This work cannot be mechanized. A new support concept, canopy compound support, has been tested in scale models to optimize both its rock mechanical effect and ergonomy. To achieve these two aims, coordination of the support setting activities with the roadheading-system as a whole is crucial besides optimal handling capacity of the single components. The canopy compound support has been tested on a special test rig in scale 1 : 3. Already available experimental data concerning yielding arch support and roof-bolting, facilitated a direct comparison and hence a purposeful optimization of special support characteristics, e.g. yieldability after breaking of the surrounding rock. The experiments in scale 1: 3 were prepared on a test rig in scale 1 : 20, which allowed for a great number of variants being tested, as well as load-control being optimized in advance. In addition to that, single components have been tested on their own: experiments have been carried out with scale models of the polygonsegments as well as with numerical models using FEM: several variants of arch legs have been tested. As a conclusion of the investigations to hand, which include an ergonomical study, as well, it can be said, that the canopy compound system is a promising support combining the advantages of both yielding arch support and roof-bolting. This should now be proved underground. (orig.)SIGLEAvailable from TIB Hannover: F94B0786+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman