Developing information systems of operation schedules to stabilize the grade of a mineral

Purpose. To develop information technology making it possible to obtain ore flow with the required grade parameters in the context of open-pit mining owing to the implementation of methods and algorithms optimizing operation schedules for ore mass mining and moving. Methods. The process involved both traditional (i.e. analysis of scientific and patent sources; analytical methods to study parameters of ore flow; analysis of experience and operations of open pits; and passive experiment as well as statistic processing of data) and new forms of scientific research (i.e. simulation modeling with the help of the deve-loped program models). Findings. Results of the studies made it possible to solve a significant scientific problem concerning stabilization of ore grades in an open pit; to develop new mathematical models concerning the effect of operational parameters of production units, intraopen-pit stabilization warehouses, and traffic flows; to develop new algorithms on the basis of mathematical models; and to implement program packages to optimize operations of stope sites, stope-to-stope traffic flows, and stabilization warehouses. Originality. The carried-out studies have helped solve significant scientific problem concerning ore grade stabilization in an open pit; new mathematical models concerning the effect of operational parameters of production units, intraopen-pit stabilization warehouses, and traffic flows have been developed; new algorithms on the basis of mathe-matical models have been obtained; and program packages to optimize operations of stope sites, stope-to-stope traffic flows, and stabilization warehouses have been implemented. The information system use made it possible to improve the accuracy of determination of boundaries between selective mining and complete mining, to optimize both design and parameters of warehouses, and to systemize determination of a mineral disposal by means of transport means. Practical implications. The program support helps improve the grade of ore flow delivered to preparation complex from open pits at the expense of optimization of operation schedule and technological development in the context of formation of blending piles. That makes it possible to achieve economic effect owing to the extraction of the commercial mineral and decrease in expenditures connected with preparation stage.Цель. Разработка информационной технологии, позволяющей получить рудопоток с требуемыми параметрами качества при открытой разработке месторождений полезных ископаемых за счет реализации методов и алгоритмов оптимизации технологических схем выемки и перемещения рудной массы. Методика. При выполнении использованы как традиционные (анализ научно-патентной литературы, аналитические методы исследования параметров рудопотока, анализ опыта и эксплуатации карьеров, проведение пассивного эксперимента и статистической обработки данных), так и новые формы научного исследования (имитационное моделирование при помощи разработанных программных моделей). Результаты. В результате проведенного исследования разработаны модели и алгоритмы формирования технологических схем стабилизации качества полезного ископаемого при открытой разработке месторождений. По полученным результатам разработан в Embarcadero RAD Studio XE программный продукт “ИС поддержки принятия решений при формировании эффективных технологических схем стабилизации качества полезного ископаемого”, состоящий из модулей “Трехмерный редактор забоя – Развал”, “Валовая выемка”, “Экскавация”, “Автотранспорт” и “Усреднительный склад”. Научная новизна. В результате проведенного исследования решена важная научная задача по стабилизации качества руд в карьере, получены новые математические модели влияния параметров работы добычных участков, внутрикарьерных усреднительных складов и транспортных потоков; на основе математических моделей разработаны новые алгоритмы и реализованы программные пакеты для оптимизации работы забойных участков, межзабойных грузопотоков и работы усреднительных складов. Использование информационной системы позволило повысить точность определения границ селективной и валовой выемки, оптимизировать конструкции и параметры складов, а также систематизировать порядок отсыпки полезного ископаемого транспортом. Практическая значимость. Программное обеспечение позволяет обеспечить повышение качества получаемого на обогатительный комплекс с карьеров рудопотока за счет оптимизации технологической схемы выемки и совершенствования технологии формирования усреднительных штабелей. Это позволяет добиться экономического эффекта за счет улучшения извлечения полезного компонента и уменьшения затрат на обогатительный передел.Мета. Розробка інформаційної технології, що дозволяє отримати рудопотік з необхідними параметрами якості при відкритій розробці родовищ корисних копалин за рахунок реалізації методів та алгоритмів оптимізації технологічних схем виїмки і переміщення рудної маси. Методика. При виконанні використані як традиційні (аналіз науково-патентної літератури, аналітичні методи дослідження параметрів рудопотоку, аналіз досвіду та експлуатації кар’єрів, проведення пасивного експерименту і статистичної обробки даних), так і нові форми наукового дослідження (імітаційне моделювання за допомогою розроблених програмних моделей). Результати. В результаті проведеного дослідження розроблені моделі та алгоритми формування технологічних схем стабілізації якості корисної копалини при відкритій розробці родовищ. За отриманими результатами розроблено в Embarcadero RAD Studio XE програмний продукт “ІС підтримки прийняття рішень при формуванні ефективних технологічних схем стабілізації якості корисної копалини”, що складається з модулів “Тривимірний редактор забою – Розвал”, “Валова виїмка”, “Екскавація”, “Автотранспорт” та “Усереднювальний склад”. Наукова новизна. В результаті проведеного дослідження вирішено важливе наукове завдання щодо стабілізації якості руд в кар’єрі, отримані нові математичні моделі впливу параметрів роботи видобувних дільниць, внутрішньокар’єрних усереднювальних складів і транспортних потоків; на основі математичних моделей розроблені нові алгоритми й реалізовані програмні пакети для оптимізації роботи вибійних ділянок, міжвибійних вантажопотоків і роботи усереднювальних складів. Використання інформаційної системи дозволило підвищити точність визначення меж селективної і валової виїмки, оптимізувати конструкції та параметри складів, а також систематизувати порядок відсипки корисної копалини транспортом. Практична значимість. Програмне забезпечення дозволяє забезпечити підвищення якості одержуваного на збагачувальний комплекс з кар’єрів рудопотоку за рахунок оптимізації технологічної схеми виїмки і вдосконалення технології формування усереднювальних штабелів. Це дозволяє домогтися економічного ефекту за рахунок поліпшення вилучення корисного компонента й зменшення затрат на збагачувальний переділ.Выражаем глубокую признательность А.Ф. Цеховому, П.А. Цеховому, Д.Ш. Ахмедову и В.А. Галкину за содействие при проведении исследований и научные консультации. Исследования выполнены в рамках государственного гранта Министерства образования и науки Республики Казахстан по теме “Разработка ИС поддержки принятия решений при формировании эффективных технологических схем стабилизации качества полезного ископаемого”, выполняемой по бюджетной программе 055 “Научная и/или научно-техническая деятельность” (№ госрегистрации 0112РК02423). Исследования выполнены на базе Рудненского индустриального института

Self-organising supply networks: A case study of the SA mining industry

For efficient operation, it is vital for supply chain management leaders and policy makers to recognize the nature of the system they deal with. Supply chains, are increasingly recognized as systems of systems, which are complex networks exhibiting selforganising properties. In large scale real-life networks, selforganisation manifests itself in distinctive structural patterns, such as Power Law connectivity distribution, scale-free, fractal, and nearly decomposable modular structure. Identification of such structural patterns in real-world supply networks may provide useful insights into their dynamics and functionality, and as a result, apply adequate governance frameworks to embrace structural complexity. To this end, the methods for identification of complexity traits in real-world industrial supply networks are of interest. A case study of the mining industry supply network in South Australia has been used to propose a method for identifying self-organisation patterns in regional industrial supply network structures. The approach combines network analysis and recent methods for testing Power Law distributions. The findings provide insights into the mining industry supply network functionality, including such operational characteristics as robustness, responsiveness, flexibility, and resilience.Larissa Statsenko, Vernon Ireland, Alex Goro

A supply network governance framework: a case study of the South Australian mining industry

Purpose – The competitiveness of mining regions largely depends on the performance of the regional supply chains that provide services to mining companies. These local supply chains are often highly intertwined and represent a regional supply network for the industry. Individual companies often use supply chain strategies that are sub-optimal to overall supply network performance. To effectively respond to an uncertain business environment, policy-makers and supply chain participants would benefit by a governance framework that would allow to incentivise the formation of supply networks structures enabling effective operations. The purpose of this paper is to offer an empirically grounded conceptual framework based on Complex Adaptive Systems (CASs) governance principles, which links network governance mechanisms with supply network structure and operational performance to incentivise the formation of adaptive and resilient supply networks in the mining industry. Design/methodology/approach – A mixed method research design and a case study of the South Australian mining sector were used to collect empirical data. Qualitative interviews and network analysis of the SA mining industry regional supply network structure were conducted. The relationships between network parameters were interpreted using CAS theory. Findings – An empirically grounded conceptual framework based on CAS governance principles is developed. The case study revealed that supply chain strategies and governance mechanisms in the SA mining industry have led to the formation of a hierarchical, scale-free structure with insufficient horizontal connectivity which limits the adaptability, responsiveness and resilience of the regional supply network. Research limitations/implications – The findings are drawn from a single case study. This limits generalisability of the findings and the proposed framework. Practical implications – The proposed framework draws the attention of the policy-makers and supply chain participants towards the need for utilising CAS governance principles to facilitate the formation of adaptive, responsive and resilient regional supply networks in the mining industry. Originality value – The proposed conceptual framework is an attempt to parameterise the governance of the regional supply networks in the mining industry.Larissa Statsenko, Alex Gorod and Vernon Irelan

Application of reverse engineering in the production of individual dental abutments.

© Published under licence by IOP Publishing Ltd. The purpose of the research is to develop a method of manufacturing individual dental abutments for a variety of dental implants. System of industrial X-ray microtomography Phoenix V|tome|X S 240 has been applied for creation of highly accurate model of the dental abutment. Scanning of dental abutment and the optimization of model was produced. The program of milling the individual abutment with a standard conical neck of hexagon was produced for the five-axis milling machine imes - icore 450i from the materials titanium and zirconium oxide

Calculation of Filtration Characteristics of Porous Media by Their Digitized Images with the Use of Lattice Boltzmann Equations

© 2018, Springer Science+Business Media, LLC, part of Springer Nature. We have investigated the features of using STR and MTR models of lattice Boltzmann equations for calculating the filtration characteristics of porous media with the use of their digital images. The results of calculations performed on the basis of these models were compared with the results of analytical calculations made with the use of stationary Navier–Stokes equations and continuity equations. Calculations of the laminar flow in a pipe with the use of the MTR model had a much higher accuracy as compared to analogous calculations by the SRT model and showed independence of the relaxation parameter. It has been established that for fluid flow in pore channels the MRT model and the Navier–Stokes equations give comparable results, whereas in using the SRT model the numerical solution depends on the relaxation parameter

X-ray microtomography and grain size analysis of bituminous sandstones from Ashalchinskoye oil field

X-ray microtomography on 4.6 mm long 4.7 mm diameter samples of bituminous sandstones from Ashalchinskoye oil field was performed with a spatial resolution of 5.8?m. The representative elementary volumes for grain size distribution were estimated along with porosity and permeability coefficients for digital cube geometry ranged between 0.3 and 3.5 mm (0.03-43 mm3).The representative elementary volume for grain size distribution was achieved at cube edge length of 2.3 mm (12.2 mm3). This value is almost 2 times higher than the estimation of representative elementary volume for absolute permeability tensor and almost 4 times higher than the estimation for porosity coefficient. It is shown that Kozeny's formula characterizing the dependence of the effective permeability coefficient on the grain diameter and the porosity gives lower values, compared with the permeability coefficients obtained by modeling flow processes on digital images

Tube fossils from gossanites of the Urals VHMS deposits, Russia: Authigenic mineral assemblages and trace element distributions

© 2016The occurrence, types, morphology, and mineralogical characteristics of tube microfossils were studied in gossanites from twelve VHMS deposits of the Urals. Several types of tube microfossils were recognized, including siboglinids, polychaetes and calcerous serpulids, replaced by a variety of minerals (e.g. hematite–quartz, hematite–chlorite, carbonate–hematite) depending on the nature of the substrate prior to the formation of the gossanites. Colonial hematite tube microfossils (~ 150 μm across,1–2 mm long) are composed of hematitic outer and inner walls, and may exhibit a cellular structure within their cavities. Spherical forms are saturated with Fe-oxidizing bacteria inside the tubes – probably analogues of trophosomes. Colloform stromatolitic outer wall surfaces are characterized by the presence of numerous interlaced filaments of hematite (2–3 μm diameter, up to 1–2 mm long). Between tube microfossils, the hematitized cement contains bundles of hematitized filaments with structures similar to the hyphae of fungi. Hematite–chlorite tube microfossils are scattered in gossanites, mostly as biological debris. They are typically 30 to 300 μm in diameter and 1 to 5 mm long. The layered structure of their tube walls is characterized by hematite–quartz and chlorite layers. Abundant filamentous bacteria coated by glycocalix and chlorite stromatolite are associated with hematite–chlorite tubes. The carbonate–hematite tube microfossils (up to 300 μm across, 2–3 mm long) occur in carbonate-rich gossanites. The tubes are characterized by fine (~ 10 μm thick) walls of hematite and cavities dominated by relatively dark carbonate or hematite. Carbonates may be present both in walls and cavities. Stromatolite-like leucoxene or hematite–carbonate aggregates were also found in association with tubes. Randomly oriented filaments are composed of ankerite. Single filaments are composed of individual cells, typically smaller than 100 nm across, similar to that of magnetotactic bacteria. Three dimensional tomographic images of all types of tube microfossils demonstrate a clear wavy microlayering from outer and inner walls, which may reflect segmentation of the tube worms. The traces of burrowing or fragments of glycocalix with relict spheres are typical of tube microfossils from gossanites. The carbon isotopic composition of carbonates associated with tube microfossils from hematite–quartz, hematite–carbonate, and hematite–chlorite gossanites average − 7.2, − 6.8, –22.8‰, PDB, respectively. These values are indicative of a biogenic origin for the carbonates. The oxygen isotopic composition of these carbonates is similar in all three gossanite types averaging + 13.5, + 14.2, + 13.0‰ (relative to SMOW), and indicative of active sulfate reduction during the diagenetic (and anadiagenetic) stages of the sediments evolution. The trace element characteristics of hematite from tube microfossils are characterized by high contents of following trace elements (average, ppm): Mn (1529), As (714), V (540), W (537), Mo (35), and U (5). Such high contents are most likely the result of metal and metalloid sorption by fine particles of precursor iron hydroxides during the oxidation of sulfides and decomposition of hyaloclasts via microbially-mediated reactions

The study of the structure of anxiety in athletes

Objective: to study the structure of disorders caused by anxiety in athletes. Materials and methods: the objects of the first task of the research were different terminological definitions and classifications of anxiety disorders. Comparative analysis of the definitions and concepts used in psychology, physiology, sports medicine, theory and methodology of physical education has been carried out. The second task was to determine the leading factors characterizing the psychological status of athletes, and to give them the descriptive characteristics. A factor analysis was conducted on the results of testing 79 athletes of combat sports (34 men, 45 women) using the M Luscher color test and the integrative anxiety test by AP Bizyuk, LI Wasserman, BV Iovlev. Results: Luscher's test scores (total deviation from the autogenous rate, mental performance, vegetative coefficient) explained only 14.5% of the total variance. Simultaneously, the indicator of situational anxiety from Luscher's test was not included in any factor. The informativeness of more detailed integrative anxiety test was significantly higher: its indicators were included in 3 factors, explaining totally 49.5% of the total variance, as well as in the general factor, which explains 33% of the total variance. Conclusions: the emotional component (emotions which cause situational anxiety) contributes largely to the total anxiety level, some smaller contribution accounts for the social components (fear of condemnation, dependence on the opinions of others), finally, the personal anxiety contributes to it even less

НЕІНВАЗИВНА ОЦІНКА ФУНКЦІОНАЛЬНОГО СТАНУ СЕРЦЯ, СУДИН І ОРГАНІВ ТРАВЛЕННЯ ПРИ ПРИЙОМІ ЗМІШАНОЇ ЇЖІ В ПРАКТИЦІ СІМЕЙНИХ ЛІКАРІВ

Функціональну коморбідність серцево-судинної і травної систем необхідно врахо-вувати при змішаному харчуванні і призначеннімедикаментозної терапії

Комплексные лабораторные исследования при профессиональных заболеваниях органов дыхания

Results of complex laboratory examination of 103 patients with dust related bronchitis caused by exposure of various industrial dusts, 22 patients with pneumoconiosis and 12 subjects not having respiratory pathology and not exposed to quartz dust or any other occupational hazards are presented in this article. Laboratory examination included morphological investigations of sputum and bronchial brush biopsy specimens, cytochemical characterization of bronchial ciliated epithelium and blood cells, and bacteriological and serological investigations of bronchial mucus. Our results demonstrated that morphological lesions of bronchial epithelium cells leading to their death followed cell dysfunction, disorders of enzyme activity, hypoxemia, predominance of Haemophilus influenzae in microflora, and significant inflammatory and allergic response in blood. These changes were found in different clinical stages of dust related bronchitis and pneumoconiosis. The findings obtained are of great importance for understanding pathogenic mechanisms of dust related lung diseases as well as from clinical point of view such as diagnosis and development of individual treatment strategies.В статье представлены результаты комплексного лабораторного обследования 103 больных с пылевым бронхитом, вызванным различными видами производственной пыли, 22 пациентов с пневмокониозом различной степени выраженности и 12 человек, не имевших в анамнезе заболеваний органов дыхания и не подвергавшихся воздействию кварцсодержащей пыли и других профессиональных вредностей. Комплекс лабораторного обследования включал морфологическое изучение мокроты, соскоб слизистой бронхов, цитохимическую характеристику функционального состояния мерцательного эпителия, а также клеток крови в сочетании с бактериологической и серологической оценкой отделяемого бронхов. Исследования показали, что изменения морфологической структуры клеток бронхиального эпителия, приводящие к их гибели, связаны с нарушением функционального состояния, ферментативной активности клеток, гипоксемией, изменением микробной флоры с преобладанием Haemophilus influenzae, выраженной воспалительной и аллергической реакцией крови и характерны для различной степени выраженности клинических проявлений пылевого бронхита и пневмокониоза. Полученные данные имеют значение как с позиции уточнения патогенетических механизмов развития пылевых заболеваний легких, так и с практической точки зрения – в диагностике и при формировании индивидуальных лечебных комплексов при этой патологии