ABSTRACT
Thus, taking attention to resource-saving factor the analysis of effectiveness of present constructions of the frame support, combined with rock bolts, is done with following criteria of low cost maintaining of development openings in the weak coalcontaining rock mass:
– the highest level of a rock mass near the contour involved to resist to rock pressure manifestations;
– the maximum adaptation degree of such combined support to the character of rock pressure manifestations in time and space;
– the coordination level (or level of synchronism) of main bearing element behavior of a combined support;
– the maximum strength balance degree of a combined support in longitudinal section and crosssection of an operation due to the self-regulation of loading on main bearing elements.
