Gusiev O. Substantiation the parameters of system of supporting mine workings by resin-grouted and rope anchors

The purpose of work is substantiation of parameters of bolting system of extraction mine workings by resin-grouted roof bolts and rope anchors with taking into account regularities of changing the stress-strain state (SSS) of surrounding rocks and their strengthening for realization of possibility of their reuse. A research object is a process of hardening of foliated massif of weak rocks by resin-grouted roof bolts and rope anchors of a extraction mine working roof in a zone of stoping operations influence. An object of research is regularities and parameters of power interaction of surrounding massif with bolting system of extraction mine workings by resin-grouted roof bolts and rope anchors during strengthening of roof rocks. The integrated approach that including analysis of processes of structural transformations of coal-bearing strata around extraction mine workings at their separate bolting is used in work; numerical modeling and analysis of SSS of load-bearing elements of geomechanical system, and also mine research of advanced bolting system and estimation of efficiency of its application. Scientific novelty of received results is following: dependence of coordinates of installation and angle of inclination of resin-grouted roof bolts in the arch of extraction mine working from an indicator of rock pressure manifestations intensity with taking into account the relation of settlement resistance to compression of immediate roof rocks of coal seam to its thickness is established for the first time; the range of parameters change changing of rope anchors installation as a part of the combined system, depending on a standard size of extraction mine working is specified and dependences of relative lengths of a plastic state of resin-grouted roof bolts and rope anchors in system from changing of the relation of settlement of resistance to compression of immediate roof rocks of coal seam to its thickness are established; the criterion for evaluation of level of resistance of resin-grouted roof bolts and rope anchors in the combined system from depth of placement of mine working and an indicator of rock pressure manifestations intensity and the relation of settlement of resistance to compression of immediate roof rocks of coal seam to its thickness is specified. Realization of results of work consists in development of a method of calculation of rational parameters of bolting system of reuse extraction mine workings, in foliated massif of weak rocks (approved by NMU and PJSC "DTEK Pavlohradvuhillia" 6/8/2015) and working documentation on drivage and maintenance of mine workings are implemented on PJSC "DTEK Pavlohradvuhillia" mines.