National Mineral Resources University
National Mineral Resources University
Briaud J.-L.,Texas A&M University |
Chedid M.,Texas A&M University |
Shidlovskaya A.,National Mineral Resources University
Scour and Erosion - Proceedings of the 8th International Conference on Scour and Erosion, ICSE 2016 | Year: 2016
Soil erosion is a major problem in civil engineering. It is involved in bridge scour, meander migration, levee and dam overtopping, internal erosion of earth dams, surface erosion of embankments, and cliff erosion. The best way to predict the erodibility of a soil is to measure it directly on a site specific basis by testing samples in the laboratory or by in-situ testing in the field. The borehole erosion test or BET is a new in-situ soil erosion test proposed to measure the erosion of the walls of a borehole while wet rotary drilling takes place. The increase in diameter of the borehole as a function of time and for a given flow velocity in the borehole is measured with borehole calipers. The result is a profile of soil erodibility as a function of depth. Tests in clay and in sand conducted at the National Geotechnical Experimentation Sites at Texas A&M University are presented. © 2016 Taylor & Francis Group, London.
Galkin A.,National Mineral Resources University
Metallurgical and Mining Industry | Year: 2015
The analysis of data on operation of the underground collector tunnel located in frozen aqueous soil was carried out. It is established that misuse and design errors caused accident conditions of the tunnel due to the progressing thawing of frozen soil. The new scheme of tunnel aeration during the winter period of year was suggested. The optimum air flow rate providing the optimum thermal conditions in a tunnel excluding progressive thawing of frozen soil in a zone of thermal influence was determined.
Kovshov S.,National mineral resources University
International Journal of Ecology and Development | Year: 2013
Biogene methods of fertility increase in restored technogenic territories are analyzed in article. Use of sapropel, biologically active foams, a biohumus belong to such directions. These technological decisions are developed on experimental base of National mineral-resources university, Saint-Petersburg, and introduced on open cast mine complexes on northwest part of the Russian Federation. The considerable attention is given to a worm technology. It is the progressive biotechnology directed on processing of an organic waste by means of rain kopost worms Eisenia Foetida. As a result of its application highly effective fertilizer a biohumus is formed. Within researches it is established that the biohumus when mixing with sodium salt carboxymethylcellulose in a proportion 125:1 can create ecologically active mix. This mix is put on raising dust technogenic territorial surfaces. It possesses high bioefficiency. As a result dust pollution essentially decreases. The fulfilled technogenic territories turns into a secondary ecosystem. Worm technology division into Russian districts became research result. Such division into districts allows to allocate zones in which it is necessary to use the various technological directions of a worm technology. © 2013 IJED.
Lyagova A.,National Mineral Resources University
International Journal of Applied Engineering Research | Year: 2016
The present papers deals with longitudinal external surface cracks in vertical steel storage tanks. A crack is a reason of tank removal from service. The analytical expression of Kcalibrations functions is need, for prediction residual life of tanks with cracks. K-calibrations functions taken into account the crack size and location, geometric tank features. The main purpose of this research is to present analytical expression of K-calibrations functions for longitudinal external surface cracks in low belt of the vertical cylindrical steel tanks. ANSYS Mechanical is used for the calculation. Several size of tanks with cracks are estimated. A wide range of various geometries of cracks and filling level of oil are researched. The two finite element models are generated for every simulation case. These are global model of tank and submodels of part of wall with crack. The finite element tank models have a good agreement with wellknown analytical decisions. The submodels have a fine precision with Raju, I. S. and Newman, Jr. J. Solutions. All K-calibrations functions results are expressed with second order polynomial functions, which should be used for the estimation of the residual life of tanks. Results of this work could be useful for engineers in oil storage field. © Research India Publications.
Alekseev V.I.,National Mineral Resources University |
Marin Y.B.,National Mineral Resources University
Geology of Ore Deposits | Year: 2015
Accessory mineralization of the Late Cretaceous intrusive series in the Far East was investigated on the basis of published data and the author’s original evidence. The composition of accessory minerals from leucogranite, monzonitoid rocks, and Li–F granites has been established. The trend in the evolution of Late Cretaceous granitoids is characterized by an increase in the mineral-forming role of iron and rare elements. Diverse accessory minerals and their typomorphic assemblages have been identified for Li–F granites and ongonites. The regional specificity of accessory mineralization in rare-metal granites consists in the leading role of the minerals W, Ta, Nb, Bi, Y, REE, and As. The uniformity of mineral species and mineral assemblages and the typomorphism and evolution of accessory minerals are inherent to the Far East belt of Li–F granites. © 2015, Pleiades Publishing, Ltd.
Gulbin Y.L.,National Mineral Resources University
Geology of Ore Deposits | Year: 2015
Phase equilibria in medium-grade metapelites of the Northern Ladoga area are calculated with the pseudosection method and Theriak/Domono software on the basis of zoning in garnets. It is shown that garnet in the staurolite-bearing parageneses crystallized at 520–600°C against the background of a pressure release from 7.0 to 3.5–4.0 kbar. The evolution of the mineral composition of rocks in the course of porphyroblast formation is discussed, placing special emphasis on the comparative analysis of P–T paths of garnet growth under decompression conditions. © 2015, Pleiades Publishing, Ltd.
Tsinkoburova M.,National Mineral Resources University
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2014
The toponymy as science arose rather recently, on at the turn of linguistics, history and geography. Natural features of the district have considerable impact on formation of place names. Therefore, studying distribution of the toponyms in connection with geological and geographical features of the region, it's possible to determine some general consistent regularities that will help to resolve an issue of an origin of toponyms and in disputable situations.Ingermanland – the ethnocultural and historical region in the territory of the Leningrad region. By the author was analysed over 100 geographical names in the former Ingermanland's territory for which is proved the connection with natural features of the district. The analysis of geological and geographical features was accompanied by studying of cartographic and archival materials for the purpose of identification of an initial pronunciation of toponyms.The established connection can not only be a key to understanding of the toponym's origin, but also represent the indirect testimony of the paleolandscape's character in the region in historical time (a question which geologists usually don't concern). © SGEM2014. All rights reserved.
Bazhin V.Yu.,National Mineral Resources University
Tsvetnye Metally | Year: 2015
Chemical and Metallurgical Faculty was founded together with Mining and Prospecting Faculties as a part of a first Russian high technical institute-Mining institute. Experts and scientists of Saint-Petersburg Mining institute made a huge contribution to development of Russian metallurgical industry and chemical productions. On the basis of the Faculty, there were created the largest scientific and design institutes as VAMI, Mekhanobr, Gipronikel. Nowadays, employees and teachers of Chemical and Metallurgical Faculty (Faculty of Processing of Mineral Resources), using modern equipment and applying innovative approaches, carry on the traditions of scientific development of great scientists. This article gives the historical information, and the leading schools of sciences and prospects of development of the Faculty are presented.
Mikhailov A.,National Mineral Resources University
Legislation, Technology and Practice of Mine Land Reclamation - Proceedings of the Beijing International Symposium Land Reclamation and Ecological Restoration, LRER 2014 | Year: 2015
This work was carried out on tailings from the Greens Creek Mine, Alaska. Establishment of vegetation on the Greens Creek Mine tailings deposit is planned to take place at closure of the mine, using natural peat as soil. The Greens Creek Mine tailings are silt-sized and composed primarily of pyrite, dolomite, quartz, and barite. Hecla Greens Creek Mining Company would place an engineered four-layer soil cover over the tailings disposal facility to minimize the amount of air and water that might enter the tailings after permanent closure. The closure plan for the tailings disposal facility at Greens Creek prescribes an engineered soil cover specifically designed to reduce available oxygen below the cover in the tailings. The cover is primarily designed to prevent diffusion of oxygen in a vapor state into the tailings. The water-saturated layer incorporated into the proposed cover design is intended to limit the flux of oxygen into tailings to that which can be dissolved in water and infiltrated. Ultimately, the rate of water flux through the cover at closure would determine the rate of oxygen ingress to tailings, which in turn would dictate the rate of pyrite oxidation. Peat from bogs represents a vast renewable source of organic matter. Peat bog is near the tailings disposal facility of Greens Creek Mine. Peat cover materials are beneficial in the provision of a top cover for the introduction and maintenance of a vegetative cover. © 2015 Taylor & Francis Group, London.
Protosenya A.G.,National Mineral Resources University
Neftyanoe khozyaystvo - Oil Industry | Year: 2015
The work is dedicated to research of strength and damage of fluid saturated rocks and has a practical application in petroleum and gas related rock mechanics. In order to understand the influence of fluids on the limit state of rock, triaxial laboratory tests on saturated rocks were conducted. The Mohr Coloumb strength theory is used to describe limit state of fluid saturated rocks. The results of stress distribution around vertical boreholes located in fluid saturated rocks based on the elastoplasticity theory are given. Prediction of limit state zone around vertical borehole shows that if initial stress state is non-hydrostaticthe shape of limit state zone is elliptical. The presents of fluids in the rockswill magnify the size of limit state zone. The assessment of probability of crack formation during hydro fracturing of borehole due to significant fluid and mud pressure is done.