ABSTRACT
The issue of interbed sustainability is actual when «chamber – safety block – interbed» system sustainability period is considered. The interbed damage leads to the formation of the common safety block for the several excavated beds. It has generally greater shape and more loading level than acceptable characterized by low sustainability period. Consequently, factors influencing the interbed behavior and the influence of its state on the whole system are considered. The complex analysis of mathematical modeling and instrumental observations results are used to investigate its behavior. Interbed stress-strain state calculations are carried out by finite element method in «ANSYS» based on specific rheological model considering three creep deformation stages. Besides, this model includes salt fracture and softening processes. Modeling results achieved are compared with the results of interbed instrumental observations. Diverse graphs of interbed breaking were obtained to predict its behavior for the certain mine and technical conditions.
