Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia



Advanced Search

Journal of Mining Sciences

2017 year, number 3

1.
Calculation of Rock Mass Deformation around Deep-Seated Underground Excavations, Considering Weight of the Overlying Strata

M. V. KURLENYA, V. E. MIRENKOV, A. V. SAVCHENKO
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: выработка, пласт, порода, смещения, напряжения, вес пород, уравнения, некорректные задачи, underground excavation, stratum, rock, displacements, stresses, rock weight, equations, ill-defined problems

Abstract >>
The analytical estimates of stress state of surrounding rock mass around underground excavations neglect the overlying strata weight, which results in the disagreement between the calculated and in situ measured displacements. The authors propose the phenomenological theory of deformation in order to eliminate the mentioned inconsistency. The theory is based on the fact that the direction of the roof rock weight load coincides with the orientation of tensile stresses found in an auxiliary problem. The authors introduce a parameter characterizing ratio of roof rock displacements to floor rock displacements, which allows solving inverse problems using the basic supplement-in situ measured displacements in the floor and roof rocks.
																								



2.
Modeling Deformation and Failure of Anisotropic Rocks nearby a Horizontal Well

V. I. KAREV, YU. F. KOVALENKO, K. B. USTINOV
Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences, pr. Vernadskogo 101, Bld. 1, Moscow, 119526 Russia
Keywords: горные породы, упруго-пластическое деформирование, геомеханическое моделирование, истинно трехосные испытания, rocks, elastoplastic deformation, geomechanical modeling, truly triaxial tests

Abstract >>
The article describes modeling mechanical behavior of rocks, including selection of models of inelastic deformation process in anisotropic rocks, experimental determination of elastoplastic properties of rocks and calculation of stress states for specific design well bottoms. The research is carried out for the conditions of Fedorov oil reservoir. The scope of modeling embraces the situations of uncased well shaft and shaft with slotted holing.
																								



3.
Assessment of Rheological Properties of Bazhen Series Reservoirs by Thermobaric Test Data

L. A. NAZAROVA1,2, L. A. NAZAROV1,3, N. A. GOLIKOV4
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia
3Novosibirsk State Technical University, pr. K. Marksa 20, Novosibirsk, 630073 Russia
4Trofimuk Institute of Petroleum Geology and Geophysics Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia
Keywords: порода-коллектор, баженовская свита, эксперимент, напряжение, температура, модуль Юнга, вязкость, коэффициент линейного расширения, обратная задача, reservoir rocks, Bazhen series, experiment, stress, temperature, Young modulus, viscosity, linear expansion coefficient, inverse problem

Abstract >>
The performed thermobaric tests of cylindrical bazhenite specimens consisted in recording of time variation in height of the specimens, h(t), under constant axial loading at varied temperature T. The authors demonstrate that under rapid increase/decrease in T deformation process obeys the thermoelastic law and calculate the coefficient of linear temperature expansion. Under constant increased temperature, the process of deformation is described using the viscoelastic Voigt model. The authors formulate and solve inverse problems on elastic moduli and viscosity of rocks by the data of h(t).
																								



4.
A Method to Describe Hierarchical Block Structure of Rock Mass, Considering Nonuniformity of Mechanical Properties

A. I. CHANYSHEV1,2, O. E. BELOUSOVA1
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Novosibirsk State University of Economics and Management, ul. Kamenskaya 52, Novosibirsk, 630099 Russia
Keywords: Неоднородность, блочная структура, модуль Юнга, модуль сдвига, статика, динамика, напряженно-деформированное состояние, nonuniformity, blocky structure, Young modulus, shear modulus, statics, dynamics, stress state

Abstract >>
Nonuniformity of a medium shows itself in many characteristics, including Young modulus, Poisson ratio, shear modulus, as well as limit elasticity and limit plasticity. The article shows that introduction of the nonuniformity of properties allows studying hierarchical block structure of a medium in different geomechanical problems and estimating effect of the blocky structure on the stress state of rock mass.
																								



5.
New-Way Determination of the Degree of Loading of a Pillar

V. N. APTUKOV1,2, I. B. VAULINA1
1Galurgia Research Institute, ul. Sibirskaya 94, Perm, 614002 Russia
2Perm State National Research University, ul. Bukireva 15, Perm, 614990 Russia
Keywords: степень нагружения целика, новое определение, соляные породы, критерий разрушения Мора, pillar loading degree, new expression, salt rocks, Mohr failure criterion

Abstract >>
Engineering formulas for the new-way determination of the degree of loading are obtained using the procedure of averaging stress state of pillars having different relative heights. The article presents quantitative estimates of the classical and proposed ways to determine the degree of loading of wide (stiff) and narrow (yielding) pillars. The scope of the study encompasses the influence of a ground surface trough and an upland area on the rock pressure value at the level of pillars, included in the expression for the determination of the degree of loading.
																								



6.
Effect of Energy Deposition on High-Voltage Electropulse Drilling Efficiency in Granite

V. F. VAZHOV1, M. YU. ZHURKOV1, S. YU. DATSKEVICH1, V. M. MURATOV1, A. RODLAND2
1Institute of High Technology Physics, Tomsk Polytechnic University, pr. Lenina 2a, Tomsk, 634028 Russia
2Norwegian University of Science and Technology, Tronheim, 7010 Norway
Keywords: электроимпульсное бурение, гранит, энерговклад, энергозатраты, промывка, шлам, electropulse drilling, granite, energy deposition, energy consumption, washing, cuttings

Abstract >>
The study shows that in electropulse drilling, an increment in deposition of energy into the discharge channel results in the linear increase in the drilling rate that grows with the spacing of electrodes. The energy consumption due to energy deposition undergoes a minimal change, while the size of cuttings is conditioned by the energy deposition and spacing of electrodes.
																								



7.
Producibility of Abrasive Garnet from Garnet-Mica Schist by Electropulse Disintegration

A. S. POTOKIN1, D. G. STEPENSHCHIKOV2, A. F. USOV1, YU. L. VOYTEKHOVSKY2
1Center for Physico-Technical Problems of Energy Engineering in the North Kola Science Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, 184209 Russia
2Geological Institute, Kola Science Center, Russian Academy of Sciences, ul. Fersmana 14, 184209 Russia
Keywords: гранат-слюдяные сланцы, Западные Кейвы, электроимпульсная дезинтеграция, гранатовая абразивная крошка, garnet-mica schist, Western Keivy, electropulse disintegration, abrasive garnet chips

Abstract >>
The article reports the research findings on feasibility of abrasive garnet production from garnet-mica schist of Western Keivy deposit on the Kola Peninsula using the method of electropulse disintegration. After the tests of material ground to - 1 + 0.25, 90% of pure garnet has been produced. The research shows prospects for electropulse disintegration application in production of pure abrasive garnet chips.
																								



8.
Improvement of Hole-Making in Soil by Puncturing

B. B. DANILOV, A. S. KONDRATENKO, B. N. SMOLYANITSKY, A. S. SMOLENTSEV
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: скважина, погружение, пневмомолот, труба, транспортирование, грунтовый керн, поршень, сжатый воздух, давление, hole, driving, air drill hammer, pipe, transport, soil core, piston, compressed air, pressure

Abstract >>
In focus is improvement of hole-making technology by puncturing with batch-wise removal of soil core while a pipe is driven in soil under impact loading. The important advantage of the technology is the concurrent pipe driving and soil core removal. The minimal air pressure required to separate a core and transport it along the pipe is determined. The frequency of soil core separation and transport during vibro-impact puncturing of pipes in soil has been tested in underground construction of utilities. The tests prove the possibility to cut-down time of trenchless construction of underground passages and to raise the level of mechanization of the operations.
																								



9.
Justification of Design and Parameters for Shock-Absorbing Cutter to Make Parts for High-Pressure Drilling Unit Cylinders

E. A. KUDRYASHOV, E. V. PAVLOV, I. M. SMIRNOV
Southwest State University, ul. 50 let Oktyabrya 94, Kursk, 305040 Russia
Keywords: буровые установки, гидроцилиндры, инструмент, композит 10, точение, комбинированная поверхность, прерывистое резание, герметичность, точность, шероховатость, надежность, drilling unit, cylinder, tool, composite 10, cutting-out, combined surface, interrupted cutting, sealing, precision, roughness, reliability

Abstract >>
The research data on the technology of manufacturing adjoining parts of valves meant to create required sealing of high-pressure drilling unit cylinders are reported in the article. The serviceability of the new design tools made of superhard composite 10 in cutting out adjoining parts from steel and plastic and in efficient shock absorption of vibrations during cutting-out has been proved. The achieved process result ensures enhanced quality of manufacturing and running efficiency of pneumatic drilling machines.
																								



10.
Promising Mining Technologies for Gold Placers in Transbaikalia

V. N. OPARIN1, A. G. SEKISOV2, A. I. TRUBACHEV2, B. N. SMOLYANITSKY1, V. S. SALIKHOV2, N. V. ZYKOV2
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Chita Division, Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, ul. Aleksandro-Zavodskaya 30, Chita, 672039 Russia
Keywords: Забайкалье, россыпь, условия залегания, морфолого-генетические типы, минералы шлиха, фотоэлектроактивационное скважинное выщелачивание, золото пластинчатое, тонкое и дисперсное, гранулометрия, новые технологии извлечения, Transbaikalia, placer, occurrence conditions, morphological-genetic types, bullion minerals, photoelectron-activated borehole leaching, flattened gold, fine gold, dispersed gold, grain-size composition, new recovery technologies

Abstract >>
The discussed basic features of geology at gold placers in Transbaikalia include: long extent, occurrence of a gold pay bed nearby gutter, small thickness of a gold pay bed and deep occurrence sometimes, majority of fine flattened gold particles. It is suggested to enhance development of such placers using new engineering solutions. It is recommended to carry out flushing by means of technologies based on the combination of flotation and gravity concentration followed by activation leaching of gold from concentrates and bullion minerals-gold concentrators. A new leaching technology offered for deep-seated placers involves pre-drainage of a pay bed, saturation of the pay bed with photoelectron-activated concentrated solutions and, finally, electrodiffusion leaching of gold.
																								



11.
Optimizing Cupriferous Ore Output at Oktyabrsky Copper-Nickel Deposit, Considering Lag Factor

A. A. ORDIN1, I. V. VASIL'EV2
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2SibgiproZoloto, Krasnyi pr. 1, Novosibirsk, 630007 Russia
Keywords: лаговое моделирование, интегральные критерии оптимальности, максимум, оптимизация, проектная мощность, инвестиции, рудник, камерная система разработки, gently dipping deposits, mining with direct dumping, parameters, process flowsheets, dragline, overburdent rocks, area of application

Abstract >>
Under discussion are the direct dumping flowsheets applied to remove lower overburden layers at coal series deposits in Kuzbass. The authors present the calculation procedure for the parameters of overburden excavation and re-excavation flowsheets using draglines. It is found how the re-excavation coefficient depends on the place and level of the dragline site. The recommendations on selecting the dragline route in case of internal dumping are made. The main trends toward expanding the area of application of the direct dumping technology are identified.
																								



12.
Rock Bolting Design for Mines Exposed to Rockburst Hazard

V. N. LOUCHNIKOV1, V. A. EREMENKO2, M. P. SANDY3, M. A. KOSYREVA4
1Goldfields Mining Company, Perth, WA, Australia
2Institute of Integrated Mineral Development-IPKON, Russian Academy of Sciences, Kryukovskii tupik 4, Moscow, 111020 Russia
3AMC Mining Consultants Ltd, Perth, WA, Australia
4People's Friendship University of Russia, ul. Miklukho-Maklaya 6, Moscow, 117198 Russia
Keywords: горный удар, анкерная “динамическая” крепь, сейсмическое событие, уровень нагрузки, энергопоглощение, деформации, разрушение, rock burst, dynamic rock bolting, seismic events, loading level, energy absorption, yielding, failure

Abstract >>
One of the approaches to reducing aftereffects of rock bursts is the dynamic support capable to stand strong dynamic rock pressure events in the form of seismic vibration and failure of adjacent rock mass. The article describes the support design procedure in use in hard mineral mines exposed to rockburst hazard. Different types of rock bolting and surface support are discussed from the viewpoint of energy absorption and yielding.
																								



13.
Improvement of Designs and Installation of Rock Bolting by Injection

R. A. IGNAT'EV, E. R. IGNAT'EV
Serikbaev East Kazakhstan State Technical University, ul. Protozanova A.K. 69, Ust-Kamenogorsk, 070004 Kazakhstan
Keywords: инъекционный анкер, полимерный упрочняющий состав, упрочняющий органо-минеральный состав, инъектор, технология установки, injection bolt, polymeric reinforcement composition, organo-mineral reinforcement composition, injector, installation technology

Abstract >>
The article describes designs of injection rock bolts that combine the functions of bolts and injectors in reinforcement of jointed rocks during mining. The data of search for low-toxic compositions are presented. The injection rock bolting installation technology is developed.
																								



14.
Enhancing Efficiency of Rock Crushing Screening Utilization

F. L. KAPUSTIN, V. A. PEREPELITSYN, V. B. PONOMAREV, A. B. LOSHKAREV
Ural Federal University named after the First President of Russia B. N. Eltsin, ul. Mira 19, Ekaterinburg, 620002 Russia
Keywords: отсевы дробления изверженных горных пород, состав, свойства, сухое обогащение, воздушная сепарация, песок, применение, бетон, volcanic rock crushing screeenings, composition, properties, dry processing, air separation, sand, application, concrete

Abstract >>
In focus is waste management-utilization of screenings after volcanic rock crushing at broken stone production plants. The authors formulate causes of increased production of screenings and their poor utilization. The composition and properties of screenings of granite, gabbro and hornblendite are determined. High content of dust particles limits the use of screenings in production of concrete and mortar. It is proposed to remove dust from screenings by pneumatic treatment. The test data on air separation of screenings by cross-flow classifier are reported. The efficiency of dry processing of screenings is checked in tests of treated sand behavior in composition of heavy concrete. It is shown that treated sand enhances strength of concrete.
																								



15.
Assessment of Influence of Voids on Phase II Mining Safety at Artemievsk Deposit

YU. N. SHAPOSHNIK, A. A. NEVEROV, S. A. NEVEROV, A. M. NIKOL’SKY
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: пустоты, напряженно-деформированное состояние, моделирование, устойчивость, безопасность, Артемьевское месторождение, руда, voids, stress-strain state, modeling, stability, safety, Artemievsk deposit

Abstract >>
Based on the developed parametric model of mined-out area in Artemievsk Mine, parameters and anticipated size of accumulated voids and exposures within the limits of Phase I mining are determined. Stability of underground excavations is estimated by the data of 3D modeling of rock mass stress state. Implementation of recommendations will allow safe completion of Phase I and transition to Phase II mining.
																								



16.
Regularities of Two-Phase Gas Flow under Coal and Gas Outbursts in Mines

A. ZHOU1, K. WANG1, T. A. KIRYAEVA2, V. N. OPARIN2,3
1China University of Mining & Technology, Beijing, 100083 China
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
3Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630091 Russia
Keywords: характеристики распространения, пылевидный уголь и газ, двухфазный поток, внезапный выброс угля и газа, ударная волна, механико-математическое и физическое моделирование, сравнение результатов, подъемные выработки, flow characteristics, dust coal and gas, two-phase flow, coal and gas outburst, shock wave, mechano-mathematical and physical modeling, comparison, hoist openings

Abstract >>
The authors discuss the mechanism of interaction between dust coal and gas flow. The characteristics of two-phase flow are studied with regard to energy of expanding gas at the stage of outburst propagation using the developed method of numerical modeling. The mechano-mathematical method is verified in the wind tunnel tests of dust coal and gas flow. The comparison of the experimental and modeling data show satisfactory agreement in description of two-phase coal dust and gas flow under outburst with formation of shock waves attenuating in the line of the flow. The volume concentration of dust coal in two-phase flow essentially influences the process of the outburst shock wave attenuation.
																								



17.
Finely Dispersed Microand Nano-Gold Recovery Using Thermomorphic Polymer with Diphenylphosphine

N. N. MATVEEVA, V. A. CHANTURIA, A. O. GAPCHICH
Institute of Integrated Mineral Development-IPKON, Russian Academy of Sciences, Kryukovskii tupik 4, Moscow, 111020 Russia
Keywords: термоморфный полимер, дифенилфосфин, золотосодержащие сульфиды, адсорбция, флотация, thermomorphic polymer, diphenylphosphine, gold-bearing sulfides, adsorption, flotation

Abstract >>
The article reports test data on adsorption and flotation characteristics of thermomorphic polymer joined with diphenylphosphine-TMPD. The tested materials are natural pyrite and arsenopyrite, and models of gold-bearing sulfide minerals. Electron microscopy and X-ray structure analysis prove that reductive adsorption of gold at the surface of sulfide minerals from HAuCl4 solution allows modeling natural aggregates of sulfides and finely dispersed gold. UV spectrophotometry proves selective adsorption of TMPD at gold. Laser scanning microscopy shows connection of TMPD with micro- and nano-size gold on polished sections of pyrite and arsenopyrite. During monomineral flotation, joint use of TMPD and butyl xanthate at a ratio of 1:1 doubles the yield of gold-bearing sulfides and enables maximum recovery of gold minerals at the total consumption of reagents reduced by 30-50%. It is found that TMPD is selective relative to gold-bearing minerals and its combination with xanthate ensures considerable increment in gold-bearing mineral recovery by flotation.
																								



18.
Platinum-Group Metals in Residual Soils and Potential Efficiency of Their Processing in Gravity Concentrators

T. N. ALEKSANDROVA, I. V. TALOVINA
Saint-Petersburg Mining University, 21-ya liniya V.O. 2, Saint-Petersburg, 199106 Russia
Keywords: платиноиды, коры выветривания, гравитационное обогащение, центробежная сепарация, отсадка, критическая скорость, коэффициент гидравлического разделения, платина, золото, морфологические особенности, Светлоборский массив, Нижнетагильский массив, platinoids, residual soils, gravity concentration, centrifugal concentration, settling, critical velocity, hydraulic separation coefficient, platinum, gold, morphological features, Svetloborsk massif, Nizhny Tagil massif

Abstract >>
The authors analyze geochemical data on residual soils of Svetloborsk and Nizhny Tagil massifs of the Ural Platinum Belt after tests aimed to determine content of platinum group elements, gold and silver in different zones of geological cross section. The scope of the analysis embraces theory of gravity concentration in the flows of suspended matter. The criterion of efficient dressability in gravity concentrators (hydraulic separation coefficient) is adapted as an alternative to the equal-settling factor inclusive of the influence of a particle shape. The presented calculated coefficients of hydraulic separation for different shape particles of olivine and platinum prove that flattened particles are separated more efficiently with centrifugal gravity concentrators. The theory is backed with the experimental data, and the conclusion on applicability of the proposed hydraulic separation coefficient is drawn.
																								



19.
Evaluation of Additional Recovery of Iron from Iron Ore Tailings

E. K. YAKUBAILIK1, A. D. BALAEV1, I. M. GANZHENKO2
1Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, ul. Akademgorodok 50, Bld. 38, Krasnoyarsk, 660036 Russia
2Evrazruda, Kondomskoe shosse 39, Novokuznetsk, 654018 Russia
Keywords: отвальные хвосты, сухая центробежная сепарация, мокрая сепарация, магнитные характеристики, неодим-железо-бор, tailings, dry centrifugal separation, wet separation, magnetic characteristics, neodymium-ferrum-boron

Abstract >>
The article demonstrates feasibility of additional iron recovery from the secondary kind of mineral raw materials-dry magnetic separation tailings obtained at crushing and processing factories of Abaza and Irba and wet magnetic separation tailing produced at Abagur processing plant of Evrazruda. Dry centrifugal separation treatment of Abaza tailings -3 mm in size allowed 6.3% of middlings with Fetotal and Femag contents of 40.4 and 32%, respectively; the result of dry magnetic separation of Irba tailings -5 mm in size is 7.7% middlings with the content of Fetotal and Femag 39.9 and 30.8%. Wet magnetic separation of Abagur tailings -0.007 mm in size allowed recovery of 0.6 to 1.45% of magnetic fraction with Fetotal content of 53.3 and 51.6%, respectively, and Femag content of 49.8 and 48.5%. Fitting of modern separators with the magnetic systems based on neodymium-ferrum-boron considerably improves output of the machines (in dry centrifugal separation circuit) and enhances the yield of magnetic product in wet separation of tailings.
																								



20.
Effect of Intergrowth Boundaries between Mineral Species of Ferruginous Quartzite on Ore Pretreatment

T. N. GZOGYAN1, YU. I. GOLOVIN2, A. I. TYURIN2, S. R. GZOGYAN1
1Belgorod State University, ul. Pobedy 85, Belgorod, 308015 Russia
2Nanotechnologies and Nanomaterials Science & Education Center Derzhavin Tambov State University, ul. Internatsional’naya 33, Tambov, 392000 Russia
Keywords: железистые кварциты, границы срастания, магнетит, гематит, кварц, наноиндентирование, нано- и микротвердость, зарождение микротрещины, структурное состояние, ferruginous quartzite, intergrowth boundaries, magnetite, hematite, quartz, nanonindentation, nano- and micro-hardness, micro-crack initiation, structural condition

Abstract >>
In focus is the nature of intergrowth boundaries between basic minerals (magnetite, hematite and quartz) composing ferruginous quartzite of Kursk Magnetic Anomaly. The data of investigation of intergrowth boundaries between contact minerals on nanotribometer Ti-950, dynamic nanotester TNI and micro-hardness tester PMT-3M before and after mechanical treatment are presented. The studied physical properties and structural conditions of basic minerals demonstrate diversity and complexity of intergrowth boundaries. It is found that strength of interphase boundaries and features of jointing are interrelated with their types and structure. It is shown that treatment of ferruginous quartzite simply by compression will result in generation of hard-to-dissociate aggregates, sludging of the ground material and reduction in the recovery of a target mineral in the end product. Based on the strength of contact phases, it is recommended to adjust grinding mode, or to apply efficient method of mechanical treatment.
																								



21.
Limit Moisture Content of Coal Concentrate Produced with Industrial Drainers

M. I. SHILYAEV1, A. I. GORBUNKOV2, A. R. BOGOMOLOV3, E. M. KHROMOVA1, E. YU. TEMNIKOVA4
1Tomsk State University of Architecture and Building, pl. Solyanaya 2, Tomsk, 534003 Russia
2Chemicals Plant Research and Production Association, ul. Pritomskaya naberezhnaya 13, Kemerovo, 650000 Russia
3Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentieva 1, Novosibirsk, 630090 Russia
4Gorbachev Kuzbass State Technical University, ul. Vesennyaya 28, Kemerovo, 650000 Russia
Keywords: обезвоживание, угольная суспензия, центрифугирование, коэффициент поверхностного натяжения, коэффициент динамической вязкости, порозность, диаметр угольных частиц, вакуум-фильтры, фильтр-прессы, влажность, dewatering, coal suspension, centrifuge process, surface tension coefficient, dynamic viscosity coefficient, fractional void volume, coal particle diameter, vacuum filter, filter press, moisture content

Abstract >>
The process of coal suspension dewatering in centrifuges and pneumatic drainage in vacuum filters and filter presses is theoretically studied. From the condition of equal centrifugal forces and surface tension applied to liquid in a granular layer of the working element of the centrifuge bowl, the analytical relation is obtained to calculate residual concentration of liquid in the treated layer. It is shown that calculation results obtained using the relation, rated data and specifications of industrial drainers agree well. With regard to the equality between the kinetic energy applied by filtration flow in the granular layer to the liquid film in the granules and the work to overcome surface tension forces that keep the film on the surface of the granules, the analytical relation is obtained to calculate residual concentration of liquid in the layer under pneumatic drainage. The estimates prove realistic nature of the results obtained with the latter relation as well as their agreement with the test and rated data of industrial vacuum filters and filter presses.
																								



22.
Wollastonite Production from Raw Material of Tyrnyauz Deposit

V. V. MARCHEVSKAYA1, S. V. TERESHCHENKO1, A. F. BARANOVSKY2, E. V. BELUZHENKO2, E. D. RUKHLENKO1
1Mining Institute, Kola Science Center, Russian Academy of Sciences, ul. Fersmana 24, Apaptity, 184209 Russia
2Kabardino-Balkaria Geological Exploration, ul. Kalinina 262, Nalchiik, 360005 Republic of Kabardino-Balkaria, Russia
Keywords: волластонитовое сырье, рентгенолюминесцентная предконцентрация, электромагнитная сепарация, флотация, схема цепи аппаратов, wollastonite raw material, X-ray luminescence preconcentration, electromagnetic separation, machine flow sheet

Abstract >>
The article describes studies into process properties of wollastonite-bearing rocks of Tyrnyauz deposit with a view to developing an efficient technology for production of high-grade wollastonite concentrate. The recommended process flow diagram includes milling, screening, X-ray luminescence separation, wet electromagnetic separation and flotation. From the data of chemical and X-ray phase analyses, the produced wollastonite concentrate conforms with the Voksil-100 grade.
																								



23.
Geoinformation Modeling of Sulfide Frost Weathering in the Area of Udokan Deposit

V. A. ABRAMOVA1, A. V. PARSHIN2, A. E. BUDYAK2, A. P. PTITSYN1
1Institute of Natural Resources, Ecology and Cryology, Siberian Branch Russian Academy of Sciences, ul. Nedorezova 16a, Chita, 672014 Russia
2Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, ul. Favorskogo 1A, P.B. 9, Irkutsk, 664033 Russia
Keywords: Кодаро-Удоканская зона, сульфидные месторождения, соединения азота, многолетняя мерзлота, поток рассеяния, подвижность элементов, физико-химическое моделирование, эксперимент, геоинформационные технологии, криогеотехнология, Kodaro-Udokan area, sulfide deposits, nitrogen compounds, permafrost, leakage flux, element mobility, physicochemical modeling, experiment, geoinformation technologies, cryo-geotechnology

Abstract >>
The presented geoinformation technology developed based on the experimental and computer-aided physicochemical modeling enables quantitative calculation and mapping of aftereffects of geochemical processes in sulfide material dumps in terms of Udokan copper deposit. The role of nitrogen as a component of acid rains is emphasized together with its effect on chemical weathering of sulfides. The authors report modeling and testing data on oxidative leaching of Udokan sulfide ore using nitrogen compounds. The classical and geoinformation approaches to calculating leakage flux being of importance for exploration and geoecology studies in permafrost are compared. The obtained results on intensification of sulfide oxidation under conditions of permafrost allow estimating potential environmental impact of the planned mining operations at Udokan deposit and can be used to improve the current cryo-geotechnologies of metal ore mining.
																								



24.
Data Recording and Transmission System for Laser Strainmetering Equipment

A. YU. RYBUSHKIN1, M. D. PARUSHKIN2,3, D. O. TERESHKIN1,2, S. V. PANOV3
1Siberian Division, Unified Geophysical Service, Russian Academy of Sciences, pr. Akademika Lavrentieva 13/3, Novosibirsk, 630090 Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
3Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentieva 13/3, Novosibirsk, 630090 Russia
Keywords: лазерный деформограф, измеритель фазового сдвига, передача данных, техногенные катастрофы, laser strainmeter, phase shift meter, data transmission, mining-induced disasters

Abstract >>
The authors have designed a multi-purpose multi-channel data recording and transmission system for the laser strainmeters and the related geophysical and seismic equipment intended for service in operating mines.