ANALYSIS OF THE CHARACTERISTIC MALFUNCTIONS ARISING AT WORK OF THE MECHANIZED FASTENING AND DEFINITION OF CALCULATION ALGORITHM FOR PRESSURE JUMPS AT DYNAMIC LOADINGS, CRITERIA OF NECESSARY INITIAL EXPANSION ON HEAVY ROOFS

Abstract

The purpose of the study is to improve the process of roof management in the face, by upgrading the power element of the mechanized fastening. Scientific novelty and practical significance. Existing research on this topic, related to improving the performance of the fastener, refers to the fact that the normal operation of mechanized fastening, under given conditions, depends on the parameters of the array, the correct choice of mechanized fastening for this face and measures to adapt mechanized fastening to load conditions. However, in all modern research there is no single approach and systematicity, which is proved in particular by the impossibility of widespread use of criteria for assessing interaction, and a large number of theories of stress-strain state of the array, which are valid within certain limits. Therefore, this work, devoted to increasing the service life of mechanized fasteners in the Donbass, by reducing the critical loads in the main fastening units, is relevant because it solves an important scientific and technical problem of analysis and adaptation of mechanized fastening to load conditions, due to statistical analysis of fastening operation in given conditions, modeling of mechanized fastening and load conditions in SolidWorks, calculations for load and fatigue under the action of variable load on fastening model, for rigid rack design, and hydraulic resistance, development of fundamentally new structure of power element of mechanized fastening for given conditions in SolidWorks software environment, methods of modeling load conditions in SolidWorks software environment. Method. Statistical analysis of malfunctions and analytical calculations of parameters are used. Results of the research. Based on the collected data on the operation of mechanized complexes we identified and characterized the shortcomings in the work and the reason for their occurrence, determined the algorithm for pressure jumps at dynamic loads and the criteria of the required initial spacing, made a histogram of the final pressure in hydraulic racks at dynamic load.