Development of a Mathematical Model of Deforming Behavior of an Insulating Jumper during Hydraulic Filling of Mine Working

Implementing measures to eliminate the negative consequences of soil subsidence during mine workings is an urgent problem. One of the methods to close mine workings not in operation is the technology of hydraulic filling; new types of insulating jumpers are studied in order to improve the technology. To select optimum dimensions of the structural elements, a comprehensive study of the impact of geometry and materials structure on its operability is required. The ANSYS Mechanical APDL software package provides a mathematical model of the deformation behavior of the insulating jumper with step-by-step backfilling of the worked space with a backfill mixture. The model is fully parametrized in accordance with the geometrical dimensions of the structure, the mechanical properties of materials, the space-filling rate, and the backfill mixture properties. This enabled the automation of the process of analysis of the impact of technological solutions and the nature of filling the worked mine space on the operability of load-bearing structural elements. Within the framework of the first approximation, the impact of the bearing frame wall thickness on the waterproof jumper stress-strain state has been evaluated; the behavior of the structure during a step-by-step filling and under instantaneous load has been compared.