Malykhin O. Substantiation the parameters of the support system of the reusing excavation workings during coal seams mining

Revealed regularities of load control of elements of the support system via optimization of strain-force parameters of wall anchors in stabilization zone of rock pressure manifestation behind the longwall in layered massif of soft rocks for creation of resource-saving conditions of reusing excavation mine workings are again defense. The support system loading mechanism behind the longwall face with detailization of limit equilibrium of zone formation of mine workings is developed. This mechanism distinguishes different-sized section of weakened rocks in walls of mine working on high and width of different it sides, and also an integrated indicator of stress-strain state "massif-excavation mine working" system from development face in zone of rock pressure manifestation behind the longwall. The multiparameter three-dimensional model of actuation processes of over-coal rock layer on a row combination with excavation mine working is justified. Model includes section ahead the longwall face, section of goaf behind the longwall face with zone of random failure, joined-block shift and gradual deflection of layers from the side of adjacent extraction pillar, and takes into account the structure and properties of neighboring rock layers in coal-bearing massif of Western Donbass. The stepwise algorithm of carrying out multiparameter computing experiment FEM based on SSS: non-uniform thin layer of soft rocks taking into account its structure, properties, mining depth and elements of support system with full deformation material diagram is developed. The complex of multiple calculations of the SSS of support system of excavation mine working in different mining-and-geological conditions of Western Donbass found a level of application feasibi-lity of each load-carrying element with a set of recommendation and calculation ex-pression at the choice of their rational parameters. The calculation results are given. These calculations completely determine the necessary parameters, which are coordinates of installation of anchors and their slope angel, length of anchors and diameter of the bearing rod. The boundary of areas of feasibility of wall resin-grouted and rope anchors application is also justified. "The methodology of calculation support system of excavation mine working of Western Donbass mines" is developed and confirmed. The expected economic effect of improvement of stability of the excavation mine workings in one stope district will make 12,02 mln UAH.