Дослідження локального зміцнення підошви виробки методом структурного моделювання

Abstract

Purpose. Search and analysis of rational forms of bottom rock strengthening at their block-discrete structure in the conditions of intensive raising in underground mine roadways. Method. The research methods used are a comprehensive approach, which includes: laboratory research on structural models, computer processing, analysis and interpretation of the results. Results. The urgency of the direction of increasing the stability of the rocks in bottom of the mine roadways by their local directional strengthening is indicated. The method of structural modelling conducted a series of studies on the installation, which was designed and assembled for the research. The influence of different schemes of strengthening block rocks in bottom of the mine roadways on the rock raising, vertical and horizontal convergence is determined. By comparing the areas of displaced rocks, calculated using a graphical editor, a conclusion was made about the effectiveness of each of the comparative hardening schemes. As a result, the scheme of hardening is determined, which allows restraining as much as possible the displacement of rocks into the roadway cavity. Scientific novelty. As a result of research it was found that when creating a bottom of the mine roadways, which is maintained in the conditions of repeated violation of its equilibrium state, a fortified zone in the form of a straight prism with the triangle of its base facing the bottom of the roadways, the volume of rocks extruded less than for the no-action model. The given form of the strengthened zone is the most effective. Practical meaning. A new method of local strengthening of bottom rocks, which can be represented by a block inhomogeneous medium, has been developed.