Sdvizhkova Y. Stability of underground mining workings in structural non-uniform rock file with the casually distributed properties

The dissertation is devoted to a problem of increasing the reliability and profitability of designing and exploitation of mining workings by the development and scientific elaboration of the reasonable complex methodology of estimation of stability of mining workings, which takes into account stochastic character of its functioning. Rock file containing natural heterogeneity and artificial cavities is considered as multilevel object with the statistically distributed properties. Probability nature of rock file firmness is investigated, the analysis of the statistical data on loading on fastening of the lingering mining workings are investigated. The algorithm of definition of internal efforts is developed, that arises in elements of fastening under action of casual loading reasonable law of distribution of factor of stability as casual size, the task of a presence of a minimum of expenses on maintenance of the mining working is decided. The stability of mining working in a zone of influence of clearing works is investigated. The parameter of probability of efficiency of security measures is elaborated. The principles of rational mining working accommodation of the rather basic system of cracks are reasonable. It is established, that depending on a direction of cracks the quantitative parameter of stability changes in 1,5-2 times.