Romanenko A. Comprehensive assessment and justification of statement rock massif parameters during the development of deep iron pit

The dissertation directed on research the complex method to prognoses slope stability of ferruginous quartzite massif. On the basis of the analysis of scientific approaches and methods of assessing the stability of bits of iron ore quarries, it is established that at the present stage of the solution of the problem of estimating the state of an array does not take into account the whole complex of factors having an influence on it. The main goal of the work is to establish regularities and substantiate the parameters of the integral indicator to developing a methodology for a comprehensive assessment of the state of a rock mass in order to increase the reliability of identifying potentially hazardous areas of a pit field. For achievement of the abovementioned purpose integrated multiplefactor approach for an assessment of a slope stability, based on division into districts of a career field by a offered factors, the integral result that developed for an assessment of pit boards sections stability that allows to define most potentially dangerous sections behind the researched factors. Сarriedout systematization of pacing factors that cause a level of stability of an array, with determination each of them specific weight. Practical importance of the presented dissertation work consists in development of a technique of division into districts of a quarry field behind major factors which cause stability of slopes. Application of the offered multiplefactor approach to an assessment of a status of a massif, gives the chance to carry out safe and effective development of mineral deposits at the considerable depths. On the basis of fractal geometry methods use, a method of calculating the coefficient of structural weakening is developed, taking into account the fractal dimension of structural disturbances. As a result of calculating the coefficient of structural weakening of the array for the Ingulets pit, it was possible to specify its value by 510%. As a result of complex research, recommendations were developed to improve the organization of mine surveying observations. Results of work passed test in Ingulets pit and quarry №1 in PJSC «CGOK» and have been accepted for provide as application by the relevant groups of service. Keywords: pit, slope stability, massif, division into districts, movements of rock, factor analysis.