bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computer Modeling of Deformation Processes in the Event of Liquidation of a Dip Over a Rock Mine
Authors: Prokopov A , Prokopova M , Hamidullina N 
Published: June 2019

Abstract
The urgency of the problem of the occurrence of earth surface failures above underground excavations is substantiated. A model of a rock massif in the zone of a dip over a mine excavation has been developed. A new method for eliminating the failure of the earth’s surface is proposed. The strength and deformation characteristics of the packing material used to eliminate the dip are investigated. Stresses and deformations in a soil massif are determined for various variants of layerwise deposition of materials into a dip. On the basis of full-scale observations of the development of failures and generalization of the results of their elimination, it has been established that the method of liquidating the failure has a significant effect on the nature of the work of the rock-lining structure being created. It is proved that the strength and deformation characteristics of the formed filling massif exert a significant influence on the stability and durability. The results of modeling the layer-by-layer method of liquidation of the dip confirmed its high reliability and efficiency.
Adamantane Hydrocarbons as Indicators of Oil Genesis in the Open System
Authors: Lifshits S Kh , Chalaya O N 
Published: June 2019

Abstract
Hydrocarbons of the adamantane structure are referred to as hydrocarbon biomarkers. However, they differ from other biomarkers in that no analogues of hydrocarbons of adamantane structure in wildlife have been found. These hydrocarbons are assumed to have been formed because of structural rearrangements and at the polycyclic naphthenic hydrocarbons molecules fragmentation. Adamantane hydrocarbons, regardless of the deposit location, are featured by the pronounced nonequilibrium composition. This is, although in laboratory experiments at sufficiently low temperatures (180-220°C) equilibrium is reached within a few days. All these testify to the fact that the formation of adamantane structures has proceeded very fast, in the kinetic regime, and is most likely to associate with the processes of hydrocarbons migration into the deposit. Researchers of adamantane hydrocarbons indicate the option of adamantane structures formation in migration processes, though not specifying the mechanism of their development. It has been suggested that the formation of adamantane hydrocarbons proceeds dynamically in a stream of deep fluids in the supercritical state. The isomeric composition of alkyl adamantanes is determined by the time of contact with the rocks, as well as their catalytic activity. This can confirm the earlier assumption on oil genesis in thermodynamically open system.
A Study of the Qualitative Chemical Composition of Technogenic Waters in the Tailing Dumps of the Russian Southern Far East in a Wide Temperature Range Using the Physicochemical Modeling Method
Authors: Frolov K R , Lysenko A I , Pyatakov A D 
Published: June 2019

Abstract
The article presents the results of technogenic waters composition physicochemical modeling for Kavalerovsky and Dalnegorsk ore districts closed tailing dams (Primorsky Krai, South of the Russian Far East). Thermodynamic modeling in “Selektor” software package in a wide temperature range from -10 to +30 °C allowed to establish the Eh-pH characteristics and to study quantitative and qualitative composition of slurry and drainage waters
Express Assessment of the Quality of Fluorite-Containing Raw Materials
Authors: Glushkova T A , Talalay A G , Shinkaryuk I E 
Published: June 2019

Abstract
In the production of fluorspar (fluorite) of various grades, the rapid and accurate determination of fluorite is important. The chemical method is used as a marking method, and neutron activation analysis is used as an express method. Initially, the neutron-activation analysis method for fluorite was used by V. Ya. Bardovski for well logging. Its essence is reduced to the irradiation of rocks containing CaF2, a neutron flux from the polonium-beryllium source, followed by the measurement of induced activity on the short-lived isotopes 16N and 20F. This method has the following advantages in comparison with chemical: expressiveness and relatively simple analysis technique, the ability to determine very small amounts of individual elements in rocks and the possibility of element-by-element analysis of rock composition in natural occurrence. The results obtained from the studies indicate that a plutonium-beryllium source should be given preference. According to calculations by E M Filippov [10], 50% of oxygen using a polonium-beryllium source is equivalent to 0.025% fluorine, and for plutonium-beryllium it is 0.0085%.
Methodological Guidelines for Prevention of Destruction of Parallel Filter Cartridges Located in One Vessel at Maximum Pressure Drop
Authors: Usachev A P , Shurayts A L , Biriukov A V 
Published: June 2019

Abstract
Technical literature lacks scientific foundations for prevention of destruction of parallel filter cartridges within one vessel in gas purification devices at maximum pressure drop. In order to prevent filter net damage caused by solid particles, which can be found in the raw (non-purified) gas stream at the inlet to the gas purification device, we have developed principles and technical solutions for installation of a protective plate with perforated holes, the size of which excludes entry of debris capable of destroying the outer surface of the filter net. In order to prevent the destruction of fully-clogged filter net from the impact occurring as the result of pressure drop in the filter cartridge, we have developed solutions for transferring gas pressure from the clogged net to the supporting rectangular plate perforated with openings. An equation is proposed for finding the maximum opening diameter in rectangular support plates, which prevent damage to the clogged filter mats adjacent to them in the event of an increase in the pressure drop to the maximum value in the cartridge.
Estimation of the Error in the Calculation of Mineral Reserves Taking into Account the Heterogeneity of the Geological Space
Authors: Shurygin D N , Vlasenko S V , Shutkova V V 
Published: June 2019

AbstractFor effective application of the method of analogy in the geometrization and prediction of indicators, it is necessary to observe the principle of similarity of the field being studied to the field-analog developed by the development. Under the conditions of similarity, it can be assumed that the nature and intensity of deformation of rocks in the conduct of mining operations will be about the same. When choosing a mine-analogue should be based on the coincidence of the degree of metamorphism of coal and rock epigenesis, tectonic structure of the sites, the lithological and material composition of rocks and their physical and mechanical properties, power and depth of the coal seam, hydrogeological conditions. Homogeneous areas of the deposit can be distinguished by various methods of cluster analysis. The quality of the classification is assessed by comparing the average values of indicators in individual clusters (homogeneous areas) with their average values throughout the place.
The Decadal-Multidecadal Changes of Extreme Air Temperature in the Black Sea Region
Authors: Kovalenko O Yu , Voskresenskaya E N 
Published: June 2019

Abstract
The decadal-multidecadal changes of extreme air temperature characteristics during winter and summer in the Black Sea region are studied in the paper. The 5th and 95th percentiles of intra-seasonal daily temperature anomalies and number of days with air temperature below the 5th and above the 95th percentile were used to describe moderate extremes. The average daily air temperature data from 13 hydrometeorological stations in 1950–2014 and from several stations in 1900–2005 were analyzed.
Pacific Decadal oscillation (PDO) and the Atlantic Multidecadal oscillation (AMO) were considered as the main global processes in the ocean-atmosphere system responsible for regional climate change on decadal-multidecadal scale. The differences of extreme air temperature characteristics between positive and negative AMO and PDO phases are analyzed in the paper. It is found that the extreme winter air temperature anomalies are increased by about 2 °C during the positive PDO phase and negative AMO phase. The winter frequency of extreme low temperature is decreased by two times during the positive PDO phase and negative AMO phase. The summer changes of extreme temperature characteristics, associated with the PDO and AMO phases are insignificant.
Study of Heat-Hydraulic Efficiency of Asphalt-Resinous Paraffinic Oil Deposits in Field and Trunk Pipelines
Authors: Sunagatullin R Z , Karimov R M , Dmitriev M E 
Published: June 2019

Abstract
The results of laboratory and numerical experimental studies of the thermal and hydraulic efficiency of a layer of wax deposits formed on the inner surface of the pipeline wall are presented. Measurements of the coefficient of thermal conductivity of wax samples of deposits taken from sections of existing main oil pipelines have been performed. To assess the effect of the sediment wax layer on the smoothness of the inner surface of the pipe wall, tests were carried out to determine the values of the roughness coefficient on samples of coils cut from sections of repaired main oil pipelines whose inner wall surface is covered with a layer of wax accumulated during their long operation and periodical pigging. The results of laboratory studies of the samples confirmed the relatively high thermal insulation properties and the smoothing capacity of the wax layer, and therefore, numerical experiments were also conducted to assess the effect of a formed wax layer on the heat and hydraulic regime mode of oil pipelines, including such parameters as the average kinematic viscosity of the flow, the final oil temperature, loss of pressure caused by the hydraulic resistance of the pipeline. Analysis of the results obtained in the course of mathematical modeling made it possible to evaluate the effective limits of the positive usage of a controlled oil wax layer as an internal thermal insulation coating for oil pipelines. Also, the paper discusses the effects of wax deposits on operational factors, such as the corrosion activity of the oil wax layer with respect to the inner surface of the pipeline wall metal.
Creating Rare Species Artificial Populations of the Genus Hedysarum L. (Fabaceae)
Authors: Maslova N V , Muldashev A A , Elizaryeva O A 
Published: June 2019

Abstract
In connection with the intensive mineral resource development, it is now topically relevant to 3cinserve the gene pool of plant rare species, whose populations find themselves within the exclusion zones (quarry mining, disposal of overburden and waste rocks, etc.). However, methods for moving plants from such zones to safe places in order to create artificial populations are still poorly developed. In Bashkortostan, tests are being undertaken to develop the methods for creating rare species artificial populations, including tick trefoils, such as Hedysarum grandiflorum Pall. and H. razoumovianum Fisch. et Helm. These species are included into the Red Data Books of the Republic of Bashkortostan and the Russian Federation. The works are being performed in the Natural Botanical Garden (natural protected area “Gurovskaya Gora” near Ufa). The aim of the research is to develop the methods for evacuating rare species and to create artificial populations and source nurseries for obtaining seeds and planting materials in order to conduct reintroduction works in the crucially endangered populations. In the test with H. grandiflorum we used 15 specimens from different places of Bashkortostan, among them from two sites where mining works are planned to be launched. The number of testing plots created since 2006 is 53. Seedlings are recorded during the first 4-6 years of observation. A massive loss of young plants is observed. Generative plants and self-seeding occur in the majority of the tests. Six specimens of H. razoumovianum are under investigation. Starting in 2005, 17 tests have been undertaken. Seedlings are recorded during 4-6 years. Generative plants emerge in the fourth or fifth year of observation. These plants bloom, produce fruits and self-seed every year. By 2014, two self-reproducing micropopulations have been formed. In 2017, 487 plants were recorde4d in one of them, with 24 maternal plants. The tests suggest the possibility to create artificial populations of these species and to conserve them under eco-phytocoenotic conditions comparable to those in nature. Even now they can serve as the seed source for the reintroduction works.
Persistent Pollutants in Urban Soil
Authors: Zubkova A , Abrosimov I 
Published: June 2019

Abstract
The paper presents an analysis of the content of PAHs and total petroleum hydrocarbons in the urban soil of the Kazan city (Russia). The soil was sampled in the areas of vehicles and industrial impact. There was no exceeding of standards neither by the sum of PAHs not by the individual compounds. Compounds with high-molecular-weight, which indicates a pyrolytic origin of their intake from air aerosols during fuel combustion, made the main contribution to the sum of PAHs content. The relative uniformity of the PAHs content in the soil was determined with the exception of the area with a high traffic activity, where the excess of the standards were 3.2 and 96 times for the sum of PAHs and benzo(a)pyrene respectively. The average content of total petroleum hydrocarbons did not exceed the regional standards in urban soil.
The Improvement of Conceptual and Categorical Framework for the Classification of Objects of Cadastral Registration
Authors: Kharitonov A A , Ershova Natalia V , Vikin Sergei S. 
Published: June 2019

Abstract
The analysis of the current legislation concerning the State Real Estate Cadastre shows that in practice the technical inventory system still exists in parallel to the State cadastral registration system. Moreover, the procedures of technical inventory and State cadastral registration are carried out in declarative order, which does not allow a timely replenishment of the tax base, in consequence of which a substantial sum of money is drained annually from the State treasury. As part of research the authors reveal that one of the major legislative lacunae is the absence of clear concepts and classification features of objects of cadastral registration, which should be completely identical to the objects of taxation. The authors propose a conceptual and categorical framework for classifying the objects in order to avoid the confusion of concepts concerning the objects of cadastral registration from the point of view of their category of importance or solidity, and eventually to form a unified approach to registration and subsequent taxation of such objects. The paper presents the suggestions on taking the real estate inventory, which due to information exchange will allow creating and updating the database of the State Real Estate Cadastre and the taxable base, by extension.
Method of Calculating the Wear, ROP and PDC Bit Operating Time
Authors: Tretyak A A , Borisov K A , Grossu A N 
Published: June 2019

Abstract
The article deals with the questions of the operating time calculation technique for the cutting PDC element of cylindrical shape. The results of laboratory studies of PDC plates in the accelerated material testing facility (AMT-2) are presented in the course of experimental studies, wear of the cutting elements over time, the relationship between the abrasiveness of the rock and the development of the PDC cutting element has been studied. The carried out researches allowed not only to confirm some existing experimental results, but also to propose a new dependence of PDC wear prediction in different rocks, rate of penetration and bit operating time in order to predict the rate of penetration. This largely determines the economic efficiency of the drilling process, greatly simplifying the forecasting of the bit wear.
Assessing the Impact of Inundation Preventing Construction on River Morphology of Can Giuoc River in Long An Province
Authors: Nguyet L M , Kandasamy Jaya , Minh D Q 
Published: June 2019

Abstract
To attend to inundation prevention in Ho Chi Minh city, the Prime Minister approved the irrigation plan to prevent inundation in which there is a solution of constructing Thu Bo tidal drainage in Long An province. Thu Bo drainage is expected to have a total width of 200m, including 120m with drainage threshold -8m and 80m with drainage threshold -4,0m. Thu Bo drainage will be constructed on Can Giuoc River which is a national waterway that has been planned (two level 3 waterways from Ho Chi Minh city to Kien Luong and to Ca Mau). The article presents the result of MIKE 21 model study to assess the impact of inundation preventing construction on river morphology of Can Giuoc River in Long An province. The result indicates that the location of the drainage has caused local erosion due to narrow riverbed, flow velocity here increases, hence there are erosions in front of and behind the drainage. The sphere of erosion influence causes riverbed modification towards the upstream and downstream about 180 – 200m, especially in the time of drainage operation, there are significant differences between the upstream and downstream water level, which causes local erosion, therefore it is essential to have riverbed and river bank strengthening reinforcement measures to stabilize riverbed.
Analysis of Build-Up of Pollutants in Bottom Deposits and Their Environmental Impact
Authors: Larin D , Staseva E , Pchelnikov I 
Published: June 2019

Abstract

Problem immediacy. Modern environmental situation in Rostov region is characterized by great pollution supply in the open air, industrial and household waste production, and presence of waste and surface watercourses. The main sources of pollution are motor transport, industrial and public utility companies in the region. Bottom deposits are generators of pollutants that are entering to water bodies. Whereas it determines the immediacy of research of their specific aspects, structures, chemical constitution and material composition and their impact on ecosystems as well.

Purpose. Researching of build-up of pollutants in bottom deposits and analysis of their environmental impact.

Object of research: Bottom deposits in water bodies of Rostov region.

Subject of research: Analysis of heavy metal accumulation in bottom deposits in water bodies

Methods. Toxico-chemical agents’ extraction in bottom deposits in water bodies of Rostov regions was performed in accordance with GOST 17.1.5.01-80, RD 52.18.191-89 based on atomic-and-absorption analysis.

Results. Problem of pollution of bottom deposits is a result of human impact on the environment. Bottom deposits owing to their high set sorption properties could be thought of as an integrated indicator of man-caused impact to water supplies. Survey findings shows that there are toxic heavy metals such as copper, lead, zinc, nickel, cadmium in bottom deposits composition in water bodies of Rostov region. Index of impact of pollutants in bottom deposits on natural ecosystems is excess of their concentration over MAC (maximum allowable concentration).

Findings: Survey findings shows the serious overrun of MAC of heavy metals in bottom deposits composition in water bodies of Rostov region. This points to necessity of survey of economy heavy metals recovery techniques and bottom deposits detoxification methods. This problem’s solution is the most pressing thing not only for Rostov region but the whole Russia.
Nanodispersing and Hardening in Technology of Selective Laser Melting of Metallic Powders
Authors: Zhukov A , Barakhtin B , Bobyr V , Kuznetsov P 
Published: June 2019

Abstract
The structure of materials produced by selective laser melting from metal powders of different chemical composition is analyzed. For all samples obtained by melting, studies showed an increase in the strength characteristics over similar indices of monolithic samples of identical chemical composition. In the set experiments, the effects of the anisotropy of the properties, due to the samples growth direction, and hardening, which linearly increased with increasing of the laser energy, were recorded. A phenomenological model of phase nuclei formation is formulated by the mechanism of condensation of metal vapors formed above the melting zone. Completeness of the crystallization process determines the quality of the material obtained. It has been established that nanoparticles of vapor condensation above the melting zone and the peculiarity of the structure of materials obtained by selective laser melting, in the form of a combination of ultradispersed particles of a condensed state and needle-like crystallites (ultrafine-grained structure of crystallization) are factors of strength enhancement. The ultra-fine-grained structure of the needle-shaped species is formed by the mechanism of epitaxy at the stage of crystallization in microvolumes with a melt, depending on the temperature conditions.
Analysis of the Acoustically Noise Situation in an Urbanized Area in the Presence of Vehicular and Industrial Noise
Authors: Bulkin V V , Khromulina T D , Kirillov I N 
Published: June 2019

Abstract
Acoustic noise is now becoming one of the important problems of the technosphere. The source of such noise in the streets of large cities is mainly motor transport, as well as industrial enterprises located in the city and construction sites. In the report some results of monitoring of acoustic pollution of the big industrially developed cities (on the example of the city of Murom) are considered. Monitoring is carried out with the help of a combined ecology-meteorological system. The measurement errors due to the standard octave analysis procedure with a control at central weighted frequencies are analyzed. It is shown that the application of the full spectral analysis using the fast Fourier transform allows us to compensate for these errors. The features of the construction of the measuring channel used in the monitoring procedure are considered. Some results of analysis of the spectrum and levels of acoustic noise on the streets of the city at different periods of the day are given. It is shown that in the most heavily loaded areas of the city, combining the activity of traffic flows and the functioning of industrial enterprises, the maximum values of sound pressure level of acoustic noise can reach 100 dB. Both maximum and average values of sound pressure are analyzed from the point of view of their compliance with the current sanitary norms. The conclusion is made that the actual noise levels exceed the maximum permissible levels for open spaces.