Starotitorov I. Substantiation of the support parameters of Krivbass iron ore development mine workings, driven in a heterogeneous rock mass

An actual scientific and technical problem of improving the stability of development workings for Krivbass iron ore mines is solved in the work. The analysis of the costs associated with maintaining mine workings is made. Situ measurements of convergence in the mines are organized and carried out. Laboratory testing the main enclosing rocks and ores, including compressive strength testing, are made. The analysis of existing strength theories is made. Simulation of rock failure in a complex stress state and in uniaxial compressive strength is done using finite element method. An algorithm for the solution of elastoplastic problem is developed. It takes into account the possibility of rocks to failure in compressive strength. Geomechanical analysis of the maintaining conditions for development workings with using an improved calculation algorithm is made for the mining and geological conditions of the "Rodina" mine. Calculations of the bolt support parameters are made for the conditions considered.