The article presents the results of the analysis of the hydrocarbon potential (KH) of the Lower Pliocene sediments (Productive series (PS) in the Azerbaijan sector and Red colored series in the Turkmenistan (RS)) and the temperature conditions for its realization within the Absheron-Pribalkhan uplift zone. The analysis is based both on the study of the regularities of changes of temperature in the space, and on the directly evaluation of maturity of organic matter (HC) in the rock. As a result of the studies carried out, the low hydrocarbon potential of the Lower Pliocene sediments (PS-RS) and the epigenetic nature of the main hydrocarbon resources of the South Caspian Basin are confirmed. Two temperature zones are distinguished within the Absheron-Pribalkhan zone, the boundary between which passes along the supposed deep break fault between the structures of Neft-Dashlary and Gunashly. In accordance with the revealed zonality in the NW of the part of the zone, the upper threshold for the beginning of oil generation is timed to a depth of approximately 2.8 km and in SE it is submerged to a depth of approximately 4.5 km. On the whole, the organic matter of the Lower-Pliocene rocks within the Absheron-Pribalkhan zone, in the considered depth interval, is characterized by low maturity and is below the "oil window".

Gold reserves localized in Precambrian deposits are known in the most crystallized shields of the Earth. They are confined to Greenstone belts on the Canadian, Indian, Brazilian and Australian shields and represented by gold reserves deposits from the first ton to 1000 – 1500 tons (Pickle crow, nor-Acme, Homestake, etc. in North America, Kalgoorlie, Leonora and others in Western Australia). Despite the presence of trough structures of Precambrian age, some of which can be considered as analogues of Greenstone belts, the Aldan shield is quite specific of the named above. The comparison of ore fields help evaluate the genesis process of gold mineralization localized in Precambrian formations crystalline shields of the planet and thus define their similarity. There is a number of features that let evaluate the uniqueness of similarities: the anomaly of the magnetic field in the plan coincide with the gravity anomalies indicating the presence of dome uplifts of the basement; the rocks that led to the existence of anomalies of the magnetic field are similar in their geochemical features; the structures mapped by these anomalies are similar to the narrow anticlinal folds; the age of those structures is approximately the same; the identity of the ore-controlling factors and stratigraphic positions. These features allow to accurately assess the similarity of deposit named after P. Pinigin that has the largest gold resources in the world. Therefore, it gives the opportunity to hope for a significant expansion of the gold potential of the Precambrian age at the Aldan shield.

The values of density and velocity in the samples of the main rocks from the Archaean section of the Kola superdeep borehole (SG-3)  drilled in the northern frame of the Pechenga palaeorift structure  were studied. The predominant part of rocks of the SG-3 Archaean  section is represented by gneisses, schists and amphibolites. Their  main rock forming minerals are plagioclase, hornblende, mica and  quartz. The structure of the rocks is mainly medium-grained, the  texture is nematogranoblastic and lepidogranoblastic. The elastic  anisotropy and orientation of the rock texture were estimated by the acoustopolariscopy method, the density and velocity of compression and shear waves were determined in the laboratory and the  mentioned characteristics were calculated by the mineral  composition. The measured sample velocities are unusually low, which can be explained by the decompaction effect of deep rocks.  The values of the velocity characteristics that are close to those for  the conditions of the rock deep occurrence are obtained by  calculation with regard to their specific mineral composition. The  average values of the velocity of compression and shear waves for gneisses calculated by the mineral composition are 6.38 ± 0.16  km/s and 3.52 ± 0.14 km/s, respectively. The average of the  compression wave velocity for schists is 6.40 ± 0.13 km/s, of the  shear wave velocity – 3.46 ± 0.09 km/s, and for amphibolites 6.84±0.13 km/s and 3.82±0.08 km/s, respectively. The ratios of the values of compression and shear moduli in different rocks exhibit the same trends as the average velocities. However, their values are  lower in schists, medium in gneisses and grater in amphibolites.

In the real work the problem of zonal disintegration of rocks around deep underground workings is considered. The review of new works of foreign scientists in the field is provided. Their main results are reflected, the used methods and approaches are described. In the work the task about distribution of the field of tension around development of round section, in the conditions of an incompressibility and hydrostatic character of a loading on infinity is considered. To be carried out the statistical assessment of a significance of earlier received analytical dependence, the linear look, an arrangement of the middle of the feed zone of destruction measured in the relative to the radius of developments units from ultimate strength of breed on an axial compression. The alternate is constructed statistically the reasonable model of a non-linear look describing dependence of the considered parameters. The comparative analysis with earlier obtained results and the experimental datas is carried out. Statistical significance of non-linear dependence of an arrangement of the feed zone of destruction, from ultimate strength of breed, its convergence with natural data and advantage before dependence of the linear look is shown.

The aim of the work is to develop new technological solutions for the use of composite materials to fill the cavities of cone crushers. The  analysis of the methods of restoring the landing surfaces for the  installation of armor and the supporting cup of cone crushers is  carried out. The publication offers a fundamentally new technology  for filling the cavities of conical shot-loks using special composite  materials. As the filled material, the use of a polyurethane composite is justified. The composition of the composite material has been  adjusted to achieve optimal technological performance. The  proposed composite material is a relatively low viscosity composition that has a high flowability and a high penetrating power. Thanks to the presented technology it is achieved: providing the initial geometric dimensions of the crusher; Hardening of hardness seats up to 400 NV, i.е. almost twice as much as the original; increase the contact area of the lower seat with the cone armor and reduce the load on the seat; ensuring tight connection of the upper and lower seats of the cone with the seats of the armor. The complex of new technological solutions for restoration provides for the reduction of off-schedule stops of the crushers and, accordingly, the number of technically complex and dangerous repairs is reduced, the efficiency of the units is increased, and the operating costs are reduced. This recovery method significantly reduces the downtime of equipment and ensures the reliability of further operation.

The article suggests a practical method of indirect curvature radius measurements of the working surface worn profile due to rail operation to create a conformal contact locomotive wheel tread with the rail. Conformal contact can provide an increase of the coefficient wheel-rail adhesion in the contact spot and lead to contact stress decrease due to an increase of the actual contact area of the interacting surfaces. The measured radius of curvature is used to restore the worn rail profile by of the rail surface grinding. It is established that in connection with the presence of random factors affecting on the surface of driving path at interaction of the locomotive wheel with the rail, random errors should be excluded from the obtained measurement results or the magnitude of the random components of errors should be estimated. At indirect measurements, it is not easy to find the best estimate of the true value of the measured size because of the unknown law of error distribution. On the basis of theoretical studies, the paper justifies a simplified formula for determination of the variance of the indirect measurement function of rail profile curvature radius according to the mathematical expectations and variances of the measured arguments. Simultaneous measurement of several arguments of the indirect measurement function leads to a correlation dependence of the arguments, that is taken into account in the proposed technique. Based on the measurement data, confidence intervals are constructed to estimate the mathematical expectation and the standard deviation of the radius of curvature of the rail. The question of choosing the number of measurements to achieve a specified accuracy of the curvature radius of the rail surface profile is considered.