THE SELECTION OF EFFICIENT OPERATING FORCE ACTIONS WHEN USING STEEL ARCHED SUPPORTS AT "SOKOLOVSKAYA" MINE
The analysis of the use of efficient operating force actions when using steel arched supports at “Sokolovskaya” mine is carried out. Haulage-drift Otkatochnyi Shtrek-15 (Haulage-drift-15), strengthened with profile Spetsial’nyi Vzaimozameniaemyi Profil-22 (Special Interchangeable Profile-22), with poor supporting strength of arch pliable support, certain frames of which showed the areas of plastic deformation, is chosen for the research. Ultimate vertical and side loads are obtained for the said frames of support. With the help of RAMKREP program calculations are performed and efficient means to increase the supporting sfrength of the frames of support are found. It is determined that, with the installation of two wedgings in the areas of pliability units and two anchors in arched support frame stands it is possible to gain the decrease of topping torque value in arched support frame up to 10.4 kN · m, which is twice lower than without the anchors.