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The relevance of the research is caused by the fact that thermal destruction is one of the most common processes used to refine oil residues, heavy oils and natural bitumen. The use of such technologies promotes the formation of distillate fractions due to destruction of high-molecular components of feedstock and is always accompanied by the formation of oil-insoluble carbonization products, usually called coke. Some processes of oil refining are purposefully used to produce coke. Resin-asphaltene substances are considered as the main coke genes. Various options of resin and asphaltene thermal destruction are widely used to study their molecular structures. The study of the composition and properties of insoluble products obtained by thermal treatment of resin-asphaltene substances will provide information on the ways of their formation. The nature of insoluble products of resin and asphaltene thermal destruction at relatively low temperatures (160...250 °C) has not been studied yet. The main aim of the research is the comparative study of composition and properties of insoluble products obtained at different temperatures of autoclave thermolysis of resins and asphaltenes from the Usinskaya oil in an inert atmosphere. Objects: resins and asphaltenes of heavy, high-sulfur and highly resinous oil from the Usinskoye oil field, chloroform-insoluble products of their autoclave thermolysis in an argon atmosphere at 250, 450 and 650 °C. Methods: autoclave thermolysis in argon atmosphere, extraction, elemental analysis, IR and Raman spectroscopy, «Rock-Eval» pyrolytic analysis, flash pyrolysis (600 °C, 20 s) with «on-line» analysis of volatile products by gas chromatography with a mass+spectrometric detector. Results. The paper introduces the results on the study of insoluble products obtained at autoclave thermolysis of resins and asphaltenes from the Usinskaya oil in argon atmosphere at 160...650 °С. Chloroform-insoluble thermolysis products obtained with high yield from the resins of heavy high-sulfur oil at 250 °C significantly differ from the insoluble products obtained from resins and asphaltenes at 450 and 650 °C. By elemental composition, IR- and Raman spectra, the results of Rock Eval pyrolytic analysis and «on-line» flash pyrolys is (600 °C, 20 s) they correspond to «asphaltenelike» substances. Their formation is probably due to the breakage at 250 °C of the most labile S-S or C-S bonds in the resin molecules with generation and subsequent recombination of macroradicals. The thermal destruction of these sub-stances at higher temperatures (450 and 650 °C) is accompanied by formation of more carbonized coke-like products.

The relevance of the research is caused by the fact that thermal destruction is one of the most common processes used to refine oil residues, heavy oils and natural bitumen. The use of such technologies promotes the formation of distillate fractions due to destruction of high-molecular components of feedstock and is always accompanied by the formation of oil-insoluble carbonization products, usually called coke. Some processes of oil refining are purposefully used to produce coke. Resin-asphaltene substances are considered as the main coke genes. Various options of resin and asphaltene thermal destruction are widely used to study their molecular structures. The study of the composition and properties of insoluble products obtained by thermal treatment of resin-asphaltene substances will provide information on the ways of their formation. The nature of insoluble products of resin and asphaltene thermal destruction at relatively low temperatures (160...250 °C) has not been studied yet. The main aim of the research is the comparative study of composition and properties of insoluble products obtained at different temperatures of autoclave thermolysis of resins and asphaltenes from the Usinskaya oil in an inert atmosphere. Objects: resins and asphaltenes of heavy, high-sulfur and highly resinous oil from the Usinskoye oil field, chloroform-insoluble products of their autoclave thermolysis in an argon atmosphere at 250, 450 and 650 °C. Methods: autoclave thermolysis in argon atmosphere, extraction, elemental analysis, IR and Raman spectroscopy, «Rock-Eval» pyrolytic analysis, flash pyrolysis (600 °C, 20 s) with «on-line» analysis of volatile products by gas chromatography with a mass+spectrometric detector. Results. The paper introduces the results on the study of insoluble products obtained at autoclave thermolysis of resins and asphaltenes from the Usinskaya oil in argon atmosphere at 160...650 °С. Chloroform-insoluble thermolysis products obtained with high yield from the resins of heavy high-sulfur oil at 250 °C significantly differ from the insoluble products obtained from resins and asphaltenes at 450 and 650 °C. By elemental composition, IR- and Raman spectra, the results of Rock Eval pyrolytic analysis and «on-line» flash pyrolys is (600 °C, 20 s) they correspond to «asphaltenelike» substances. Their formation is probably due to the breakage at 250 °C of the most labile S-S or C-S bonds in the resin molecules with generation and subsequent recombination of macroradicals. The thermal destruction of these sub-stances at higher temperatures (450 and 650 °C) is accompanied by formation of more carbonized coke-like products.

Relevance and aim of the study. Improving the quality of metal ores in development of complex deposits by underground method is provided by the use of technology with the laying of the cavities hardening compounds, but the extension of the scope of technology development with the laying of the cavities hardening mixtures is limited by lack of binding cements. Reduction of deficit in binders as a means of improving the quality of extracted ores through the involvement of mineral waste in production is an urgent task of mining science and the aim of the research. Methods. Research methodology includes the analysis of efficiency of ore extraction through the use of anthropogenic resources in underground development of deposits of metal ores, activation of components of solid mixtures in a laboratory ball mill for differentiated parts of the backfill array and interpretation of the results. Results. The authors have proved the possibility of reducing the deficit in the goods by making the binder solid mixtures on the basis of the utilized slag. The paper introduces the results of studies of the activation parameters of the granulated blast furnace slag in ball mill. The authors determined the concrete mixture strength dependence on duration of slag activation and recommended the economicmathematical model to determine the amount of profit from the disposal of tailings the metallurgical mining industry, taking into account the lost in ore extraction. It is shown that the disposal of hazardous during storage of mineral waste allows solving a set of problems in mining industry. Conclusions. Improving the quality of ores in their extraction and extension of application area of resource-saving technologies of exploration with voids bookmark with hardening mixtures is achieved by using available and cheap tails of technological processes.

Relevance and aim of the study. Improving the quality of metal ores in development of complex deposits by underground method is provided by the use of technology with the laying of the cavities hardening compounds, but the extension of the scope of technology development with the laying of the cavities hardening mixtures is limited by lack of binding cements. Reduction of deficit in binders as a means of improving the quality of extracted ores through the involvement of mineral waste in production is an urgent task of mining science and the aim of the research. Methods. Research methodology includes the analysis of efficiency of ore extraction through the use of anthropogenic resources in underground development of deposits of metal ores, activation of components of solid mixtures in a laboratory ball mill for differentiated parts of the backfill array and interpretation of the results. Results. The authors have proved the possibility of reducing the deficit in the goods by making the binder solid mixtures on the basis of the utilized slag. The paper introduces the results of studies of the activation parameters of the granulated blast furnace slag in ball mill. The authors determined the concrete mixture strength dependence on duration of slag activation and recommended the economicmathematical model to determine the amount of profit from the disposal of tailings the metallurgical mining industry, taking into account the lost in ore extraction. It is shown that the disposal of hazardous during storage of mineral waste allows solving a set of problems in mining industry. Conclusions. Improving the quality of ores in their extraction and extension of application area of resource-saving technologies of exploration with voids bookmark with hardening mixtures is achieved by using available and cheap tails of technological processes.

The Arctic is undergoing rapid climate change, which affects the global and regional carbon cycles. The East Siberian Arctic shelf, that is believed to store huge amounts of organic carbon in different pools, has been the subject of growing scientific interest in recent decades. The aim of the work was to study the lithological features of bottom sediments on the East Siberian Arctic shelf and to assess their influence on the spatial distribution of organic material in the study area. Materials and methods. The sediment samples were collected during the 45-day multidisciplinary SWERUS-C3 expedition on IB ODEN in summer 2014. Surface sediments from inner and middle East Siberian Arctic shelf were collected in summer 2008 during the International Siberian Shelf Study (ISSS-08) campaign onboard the HV Yakob Smirnitsky. The samples were analyzed for the grain size and specific surface area characteristics and total organic carbon content. It is shown that the subglacial sedimentation and the accumulation of predominantly fine-grained sediments prevail within the study area. Nevertheless, atypical sand zones were identified on the outer shelf. The authors have suggested several external factors, including modern and paleo ice scouring in the early Holocene, and intensive gas venting, which are accompanied by removal of fine-grained sediments. The paper considers spatial distribution of organic matter in the bottom sediments of the East Siberian Arctic shelf and its interrelation with their lithological properties.

The Arctic is undergoing rapid climate change, which affects the global and regional carbon cycles. The East Siberian Arctic shelf, that is believed to store huge amounts of organic carbon in different pools, has been the subject of growing scientific interest in recent decades. The aim of the work was to study the lithological features of bottom sediments on the East Siberian Arctic shelf and to assess their influence on the spatial distribution of organic material in the study area. Materials and methods. The sediment samples were collected during the 45-day multidisciplinary SWERUS-C3 expedition on IB ODEN in summer 2014. Surface sediments from inner and middle East Siberian Arctic shelf were collected in summer 2008 during the International Siberian Shelf Study (ISSS-08) campaign onboard the HV Yakob Smirnitsky. The samples were analyzed for the grain size and specific surface area characteristics and total organic carbon content. It is shown that the subglacial sedimentation and the accumulation of predominantly fine-grained sediments prevail within the study area. Nevertheless, atypical sand zones were identified on the outer shelf. The authors have suggested several external factors, including modern and paleo ice scouring in the early Holocene, and intensive gas venting, which are accompanied by removal of fine-grained sediments. The paper considers spatial distribution of organic matter in the bottom sediments of the East Siberian Arctic shelf and its interrelation with their lithological properties.