This research focuses on patterns of change in the dimension stone commodity blocks quality production on previously identi ed and measured geometrical parameters of natural cracks, modelling and planning out the nal dimension of stone products and nished products based on the proposed digital photogrammetric techniques. The optimal parameters of surveying are investigated and the in uence of surveying distance to length and crack area is estimated. Rational technological parameters of dimension stone blocks production are taken into account.

The influence of primary kaolin moisture on the duration of bucket unloading is proven, and the analytical dependence for the estimation of this ratio in the form of a second-degree polynomial is obtained. Three main technological schemes for different technological conditions substantiate the procedure for evaluating the productivity of the primary kaolin excavation for cases of selective development of curvilinear sections on the basis of the first proposed technological coefficient of the contact form, which takes into account the fractal nature of the section's shape, are suggested in the article. It is first proposed to include the specific time of shifting in the working cycle of backhoe type excavators. The mathematical models of the primary kaolin excavation process on the curved face of the conditioned area with a backhoe type excavator for different varieties of the mutual arrangement of the hydraulic excavator and the hauler are developed.

When developing the deposits of decorative facing stone, the economic efficiency of mining to a large extent will depend on the effectiveness of management of technological processes. According to the results of research into approaches to the process of extraction of blocks of decorative stone [1-8], the efficiency of application of separate 19. A Guide to the Project Management Body of Knowledge (PMBoK Guide). Fifth Edition [Теxt].-USA : PMI Inc., 2013.-589 p. 20. Bubela, T. A study of uncertainty of expert measurement results in the quality management system [Text] / T. Bubela,

Studies have been conducted with the aim of studying ways to improve the decorative properties of natural stone products. That will allow to make a nished product run of natural stone with a homogeneous tint. For this purpose, the indicators of lustre, lightness and saturation of natural surfaces of facing stone worked by mechanical and chemical methods are described. The in uence of chemical treatment on the decorative indicators of various kinds of natural facing stone depending on its mineralogical composition is determined.

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