Abstract
The article presents the results of studies of the structural features of the massif and the strength properties of rocks of the Karatau phosphorite deposits. The general pattern of variability of the strength properties of rocks in the massif was considered by the method of mathematical statistics and correlation analysis, as well as data on rock properties for deposits in the Karatau basin, where a stable relationship between average density, strength, adhesion, resistance and depth of their occurrence was established. The stress-strain state of the massif was determined by the unloading method and the correlation dependence of horizontal stresses on the depth of occurrence, as well as an assessment of the degree of strength, elasticity, plasticity of rocks and their ability to fracture or deformation under various loads. The regularities and parameters of the process of displacement of rock massifs similar in geological and tectonic structure for predicting the properties of rocks in the deposits of the basin are revealed. The results of the research can be useful in solving a number of technical problems in quarries and underground mines in assessing the stability of ledges and sides of quarries, in predicting angular displacement parameters, in calculating targets and ceiling spans.
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