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Igor P. Timofeev
Igor P. Timofeev
Professor, Ph.D., Dr.Sci.
Saint Petersburg Mining University
Professor, Ph.D., Dr.Sci.
Saint Petersburg Mining University

Articles

Geotechnical Engineering and Engineering Geology
  • Date submitted
    2022-03-14
  • Date accepted
    2022-06-20
  • Online publication date
    2022-11-07
  • Date published
    2022-11-10

Model of a walking sampler for research of the bottom surface in the subglacial lake Vostok

Article preview

Technologies and technical means for investigation of subglacial lakes in Antarctic is a new developing scientific and technical direction, which today has no clearly established methodology. Based on the developed technology of drilling a new access well to lake Vostok and its penetration as well as analysis of existing methods and devices for bottom sediment sampling, a basic model of a sampler with a walking-type mover, capable of moving along different trajectories and operating in a wide technological range, is proposed. The proposed device model is equipped with different actuators for sampling the bottom surface with different physical and mechanical properties. Based on the presented basic model of the walking sampler, a mathematical model of the device was developed, which was based on the theoretical mechanics methods. As a result of conducted research the dependencies were obtained, which allow making a scientifically justified choice of optimal values for geometric and force parameters of the walking sampler. A conceptual design of the walking sampler has been developed, taking into account the mutual location and coupling of its main components, the overall dimensions of the delivery tool, as well as the esthetic component of the device.

How to cite: Shishkin E.V., Bolshunov A.V., Timofeev I.P., Avdeev A.М., Rakitin I.V. Model of a walking sampler for research of the bottom surface in the subglacial lake Vostok // Journal of Mining Institute. 2022. Vol. 257. p. 853-864. DOI: 10.31897/PMI.2022.53
Geology
  • Date submitted
    2021-10-19
  • Date accepted
    2021-11-30
  • Date published
    2021-12-17

Potential technological solution for sampling the bottom sediments of the subglacial lake Vostok: relevance and formulation of investigation goals

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The subglacial Lake Vostok in Antarctic is a unique natural phenomenon, its comprehensive study involves sampling of water and bottom surface rocks. For further study of the lake, it is necessary to drill a new access well and develop environmentally safe technologies for its exploration. This article discusses existing and potential technologies for sampling bottom surface rocks of subglacial lakes. All these technologies meet environmental safety requirements and are conducive for sampling. The authors have proposed an alternative technology, using a walking device, which, due to its mobility, enables selective sampling of rocks across a large area from a single access well. The principal issues, related to the implementation of the proposed technology, are investigated within this article. This report is prepared by a team of specialists with many years of experience in drilling at the Vostok Station in Antarctic and in experimental work on the design of equipment and non-standard means of mechanization for complicated mining, geological and climatic conditions.

How to cite: Bolshunov A.V., Vasiliev N.I., Timofeev I.P., Ignatiev S.A., Vasiliev D.A., Leichenkov G.L. Potential technological solution for sampling the bottom sediments of the subglacial lake Vostok: relevance and formulation of investigation goals // Journal of Mining Institute. 2021. Vol. 252. p. 779-787. DOI: 10.31897/PMI.2021.6.1
Electromechanics and mechanical engineering
  • Date submitted
    2015-11-18
  • Date accepted
    2016-01-10
  • Date published
    2016-05-01

PNB type loader shoveling arm motion irregularity in dependence of its mass

Article preview

Requirements are formulated on motion trajectory of the front edge of the arm of PNB type loader needed to provide the maximum shoveling of bulk mass under the condition of fitting that trajectory into the dimensions of reception plate. Kinematic schemes are analyzed of mechanisms of shoveling arms. Rational parameters are suggested for that mechanism, which provide a 1.5 times increase of single-time shoveling of bulk load resulting in a 30 % increase of theoretical capacity of the machine. A technique is presented of defining the area embraced by the complex motion trajectory of the front edge of the arm. A mathematical model is designed of motion of the shoveling arm with curvilinear tail part using the techniques of vector algebra, second order central differences and triangulation. Geometric parameters of the mechanism of work tool of the loader are described by a linear equation yielding the functional dependence of coordinates of the position of front edge of the arm on the turning angle of the leading joint and the parameters of kinematic scheme. The effect is studied of the total mass of shoveling arm on the irregularity factor of mechanism motion. It is found that redistribution of mass between the work tool and the tail part of the arm within the given total mass of the tool suppresses the motion irregularity factor.

How to cite: Timofeev I.P., Kuzkin A.Y. PNB type loader shoveling arm motion irregularity in dependence of its mass // Journal of Mining Institute. 2016. Vol. 221. p. 717. DOI: 10.18454/PMI.2016.5.717
Electromechanics and mechanical engineering
  • Date submitted
    2014-12-09
  • Date accepted
    2015-02-16
  • Date published
    2015-06-01

Dynamic study of underground loading machine’s working tool crank-rocker mechanism

Article preview

The article is devoted to the dynamic study of the underground shovel’s working tool mech-anism, assembled in accordance with a crank-rocker scheme, containing curved wings, as well as to the study of the effect on uneven movement rate, produced by the working tool mechanism; pa-rameters and structural characteristics of the shovel paw design shape. On the basis of a synthesis of the loading machine’s working tool mechanisms, a kinematic scheme with a shovel paw, con-sisting of a straight operating part and a curved working tail, is offered. A dynamic model of the mechanism based on a variable weight of shovel bulk cargo and drive parameters of the working tool is developed, a motion equation is made up. Comparison between statistical indicators of effec-tive output obtained from the shovel loaders drive mechanism and the results of a separate computer simulation of the mechanisms under analysis attest to the proposed model’s performability.

How to cite: Timofeev I.P., Korolev I.A. Dynamic study of underground loading machine’s working tool crank-rocker mechanism // Journal of Mining Institute. 2015. Vol. 216. p. 104.
Manufacturing machinery and equipment
  • Date submitted
    2013-09-19
  • Date accepted
    2013-11-06
  • Date published
    2014-03-01

Parameters optimization of the mechanism of the shovel loaders feet type PNB

Article preview

Influence of geometrical and kinematic parameters of the kinematic scheme of the mechanism of working body of a loader of type PNB on increase in theoretical productivity depending on position of the area of capture of cargo is shown and the analysis of change of speed and acceleration of an extreme point of working body of a paw for one turn of a crank is given.

How to cite: Belous N.A., Kuzkin A.Y., Timofeev I.P. Parameters optimization of the mechanism of the shovel loaders feet type PNB // Journal of Mining Institute. 2014. Vol. 209. p. 13.
Manufacturing machinery and equipment
  • Date submitted
    2013-09-29
  • Date accepted
    2013-11-22
  • Date published
    2014-03-01

Mathematical modeling of movement of the bottom device during its transporting by flexible traction element

Article preview

The interaction of the flexible traction element with bottom mining device by the solution of the set of equations, which allows to determine the nature of the movement and the force between them, and also described the situation flexible traction element as it moves in the water.

How to cite: Kolton G.A., Korolev I.A., Timofeev I.P. Mathematical modeling of movement of the bottom device during its transporting by flexible traction element // Journal of Mining Institute. 2014. Vol. 209. p. 55.
Mining electromechanics and mining equipment
  • Date submitted
    2011-08-15
  • Date accepted
    2011-10-24
  • Date published
    2012-02-01

The investigation of complex production of ferromanganese nodules during its movement by flexible traction elements

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The article deals with contemporary problems of the world mineral complex, reflects the main issues of relevance and prospects of integrated development  of solid mineral resources of the seabed. The composition, morphology and potential reserves of iron-manganese nodules are presented, a complex of equipment for the extraction of iron-manganese nodules and power characteristics that influence the extraction process are considered. On the basis of a mathematical model, the relationship between the force and kinematic characteristics is defined. The basic equation of motion of bottom devices is derived, concluded the possibility of solving this equation by numerical methods.

How to cite: Timofeev I.P., Korolev I.A. The investigation of complex production of ferromanganese nodules during its movement by flexible traction elements // Journal of Mining Institute. 2012. Vol. 196. p. 244.
Mining electromechanics and mining equipment
  • Date submitted
    2011-07-27
  • Date accepted
    2011-09-30
  • Date published
    2012-01-01

Synthesis of the mechanism of the effektor of a gathering-arm loader

Article preview

In article possibility of performance improvement of a gathering-arm loader at the expense of adjustment of the kinematic circuit oscillating crank mechanism a method of synthesis of a path of driving of the leading edge of a gathering arm on the given conditions of processes of implementation, capture and bulk cargo transportation is considered.

How to cite: Vasileva M.A., Kuzkin A.Y., Timofeev I.P. Synthesis of the mechanism of the effektor of a gathering-arm loader // Journal of Mining Institute. 2012. Vol. 195. p. 241.
Technological machinery and equipment of mining and oil & gas industries
  • Date submitted
    2007-11-07
  • Date accepted
    2008-01-28
  • Date published
    2008-05-01

Results of analytical research of crushers with complex jaw motion

Article preview

In this article, the results of the kinematics and dynamics analysis of a single-toggle jaw crusher mechanism are represented. Connection between operation mode parameters of the crusher and its technical characteristics is shown. Such parameters as position of the toggle plate, pin angle of the crusher, rotation speed and the eccentricity of the main shaft are described.

How to cite: Golikov N.S., Timofeev I.P. Results of analytical research of crushers with complex jaw motion // Journal of Mining Institute. 2008. Vol. 178. p. 40-42.
Without section
  • Date submitted
    2000-07-15
  • Date accepted
    2000-08-16
  • Date published
    2001-02-01

New developments in mechanical equipment at the Faculty of Mining and Electrical Engineering

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The main results of research work performed at the departments of the mechanical cycle of the Faculty of Mining and Electromechanics in 2000 are presented. Research and design works for making effective and environmentally safe machines and complexes for mining and processing industries are made at the Faculty of Mining and Electromechanics under the guidance of leading experts. The analysis of design and operating characteristics of manufactured dump trucks is given and modern principles of formation of design and operating requirements to them are formulated. A methodology and mathematical model for determining the optimal characteristics of the complexes have been developed. Studies on the development of hydraulic transport equipment for underwater development of offshore mineral deposits have been carried out. New technological schemes of slurry hydrotransportation in flexible sectional pipelines of variable curvature united by spherical joints are proposed. Research work on the development of the theory of working processes and improvement of electromechanical mining equipment complexes for energy-saving technologies was carried out.

How to cite: Ivanov S.L., Kuleshov A.A., Makhovikov B.S., Timofeev I.P. New developments in mechanical equipment at the Faculty of Mining and Electrical Engineering // Journal of Mining Institute. 2001. Vol. 147. p. 105-111.
Mining
  • Date submitted
    1994-09-26
  • Date accepted
    1994-11-01
  • Date published
    1995-03-01

Расчеты и применение энергетических характеристик для проходческих комбайнов

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Представлены результаты расчетов на ЭВМ энергети­ческих характеристик проходческих комбайнов со сдвоен­ными корончатыми и шнековыми исполнительными органами. Приведены параметры исполнительных органов с минимальными удельными энергозатратами на разруше­ ние породы.

How to cite: Bolshunov A.V., Timofeev I.P., Yungmeister D.A. // Journal of Mining Institute. 1995. Vol. 142. p. 121.
Without section
  • Date submitted
    1992-09-22
  • Date accepted
    1992-11-06
  • Date published
    1993-03-01

Теоретические исследования параметров шагающего шасси с подвижным поплавком

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Изучение и промышленное освоение ресурсов морского дна невозможно без технических средств и, в первую очередь, подводного горного оборудования. Важная роль среди подводных горных машин отводится данным агрегатам, несу­щим на себе добычные и геолого-разведочные рабочие органы в виде всасываю­щих наконечников, рыхлителей, ковшей, подборщиков, отвалов, грунтовых на­сосов, эрлифтных головок, зондов, крыльчаток, штампов и др.

How to cite: Timofeev I.P., Ulashchik N.K. // Journal of Mining Institute. 1993. Vol. 138. p. 3.
Without section
  • Date submitted
    1987-09-06
  • Date accepted
    1987-11-15
  • Date published
    1988-03-01

Результаты океанических испытаний установки исследований донных грунтов

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При проведении инженерно-геологических работ на научно-исследовательском судне «Академик Александр Карпинский" ПГО  «Севморгеология» в Тихом океане была испытана глубоководная исследовательская установка УГИ-4М, предназначенная для проведения измерений в натурных условиях ме­ханических свойств океанических донных отложений на глубине до 6000 м ...

How to cite: Timofeev I.P., Ulashchik N.K., Ulyanov E.M. // Journal of Mining Institute. 1988. Vol. 117. p. 93.
Without section
  • Date submitted
    1985-08-13
  • Date accepted
    1985-10-19
  • Date published
    1986-02-01

Установка для глубоководных исследований

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В настоящее время активно развивается промышленное освоение океана и одно из основных направлений работ по исследованию его ресурсов - добыча полезных ископаемых. Для добычи полезных ископаемых на шельфе создан комп­лекс машин и аппаратов, куда входят землесосы, подводные бульдозеры типа "Комацу", роботы "Нихон" и "Комацу", аппарат РУМ, система "Хитачи", раз­личные шагающие установки, разработанные и испытанные в Советском Союзе ...

How to cite: Timofeev I.P., Ulashik N.K., Ulyanov E.M., Andreev A.G. // Journal of Mining Institute. 1986. Vol. 108. p. 100.
Without section
  • Date submitted
    1980-11-28
  • Date accepted
    1981-01-09
  • Date published
    1981-05-01

Статика шагающих добычных машин с подвижной массой

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При опытной разработке морского дна на шельфе Балтийского моря в 1977 г. испытана шагающая машина с эрлифтным рабочим органом, которая движется по морскому дну за счет изменения положения центра масс при пе­ремещении рабочего органа вдоль несущей рамы на одну из консолей  ...

How to cite: Timofeev I.P. // Journal of Mining Institute. 1981. Vol. 88. p. 128.
Without section
  • Date submitted
    1974-07-25
  • Date accepted
    1974-09-15
  • Date published
    1975-01-01

Исследование вибротранспортирования калийной руды

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Исследованиями института ВНИИГалургии определены перспективные комплексы для камерной системы разработок, состоящие из комбайнов для отбойки руда, самоходных погрузочных и транспортных машин для погрузки и доставки руды по камере, скребковых и ленточных конвейе­ров для транспортирования руда к отводу ...

How to cite: Kuznetsov E.S., Timofeev I.P. // Journal of Mining Institute. 1975. Vol. № 1 69. p. 60.
Information on research works of the department of construction of mining machines
  • Date submitted
    1969-09-27
  • Date accepted
    1969-11-30
  • Date published
    1970-03-01

Исследование эксцентрикового привода вибрационных машин

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На примере вибрационной погрузочной машины разрабатывается метод расчета действующих нагрузок в кинематических парах эксцентрикового привода вибрационного погрузочного лотка. При этом используется графи­ческий метод кинетостатического исследования, с помощью которого опре­деляются величины и направления реакции в шарнирах.

How to cite: Timofeev I.P. // Journal of Mining Institute. 1970. Vol. № 1 60. p. 208.