The article considers some specific peculiarities of metasomatically altered rock of Svetloye gold and silver field , which is situated in Okhotsk region of Khabarovsk Territory. Enclosing rock of ore zones of the field under consideration are lava and tuff of andesite and andesite-dacitic, which are altered in all parts in the result of hydrothermal-metasomatic processes. At the field the following types of metasomatosis are displayed: propylitization, secondary silification, and argilization. Each type is characterized by own origination conditions – alkali composition of hydrothermal fluids and the temperature of their origination. The characteristics of physical and mechanical properties of field rock is examined, the regularities in strength characteristics reduction are defined by means of “weakening” minerals presence in rock, the regularities in the alternation of properties depending on the type of metasomatosis and the distribution of minerals in the cut of the field. With the purpose of defining the peculiarities of physical and mechanical properties alternation, the analysis of the results of field rock mineral composition and physical and mechanical properties determination is fulfilled. The regularities stated are important at the solution of the problem of the mineral stripping, the degree, character, and type of mine workings support.
Geodynamic (tectonic) stress state of the upper part of the earth crust is manifested by the presence of the main normal stresses, which, as a rule, exceed geostatic stresses from the rock weight. Extension zones form sections with the lower bearing capacities in geological strata. From the perspective of hydrogeology, sections of extension are the most water-bearing; they contribute to the formation of high filtration properties at the local section of rock massif. In the Urals, in case of shears intersecting, extension zones usually occur in the northern and southern sectors, whereas the compression zones, correspondingly, in the western and eastern sectors. In the field of modern tectonic stresses under the intersection of multidirectional faults and the faults of various kinematic type, the zones of extension and compression may occur, which should be studied to estimate the safety of the buildings and structures construction and exploitation, as well as to search for the sections with higher filtration properties in rock massif for water supply. Modern fulfillment of the complex of geophysical, geodetic, and hydrogeomechanical investigations at the stage of pioneering or at the initial operating period, makes it possible to reveal the reasons for the possible deformations and, perhaps, save a building from destruction.
The article deals with problems of natural and human-induced processes in the city of Khanty-Mansiysk. Processes are characterized by diversity and intensity of a wide range of activity and adverse effects; processes of erosion and slope stand out. About 40-50% of the city center, located within Samarovsky outcrop, is in different scale exposed to such processes as gullying, landslides, debris and suffusion. With a significant variety of formation conditions and peculiarities of such processes, the common patterns are the increase of the affected areas and the growing intensity of the process. Under their threat are many residential buildings, industrial sites, structures of the world famous "Biathlon Center". This research made it possible to establish the main features and patterns of development of these processes.
The position of mineral deposits of the Urals of various geological and industrial types in rocks of structural and formational megazones, their belonging to the metallogenic sub-provinces, zones and subzones are considered. Natural and technical system of mineral deposits as a structured interaction region of the rock mass deposits and mining facilities was characterized; modalities of the interaction region and their components: physical and geographical conditions (climate, biota, topography, hydrology); geological and structural conditions (tectonic features, occurrence of rocks); lithological and petrographic conditions (genesis, age, composition and properties of rocks); permafrost-hydrogeological conditions (types of groundwater, frozen state of rocks); geodynamic conditions (stress state, geological and mining-geological processes). Mining facilities (quarry, underground mining) include: type of facility, method of construction, construction of excavation. Deposits are differentiated by the complexity of geotechnical conditions of their development into three groups - simple, medium and difficult. The features of the development of mineral deposits of varying complexity in open pit and underground mining were considered.