State Enterprise Navoi Mining and Metallurgical Combine

Navoiy, Uzbekistan

State Enterprise Navoi Mining and Metallurgical Combine

Navoiy, Uzbekistan

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Sultanov K.S.,Academy of Sciences of Uzbekistan | Khalikulov E.Kh.,State Enterprise Navoi Mining and Metallurgical Combine | Loginov P.V.,Academy of Sciences of Uzbekistan
Gornyi Zhurnal | Year: 2013

There are considered the aspects of stability of Muruntau open pit edges and complex of high-angle conveyor KNK-270 during the interconnection of possible seismic loads and dynamic loads, which appear in the conditions of mining operations in open pit. The basic characteristics of dynamic loads were defined on the basis of obtained records of detectors of seismic signals of autonomous seismic monitoring complex, functioning in Muruntau open pit. Both dynamic loads appear because of large scale blasts in open pit, and because of functioning of the conveyor KNK-270. There were defined the amplitudes and frequencies of oscillations of blast and technological loads, which make an influence on open pit's eastern edge, where the conveyor KNK-270 is situated. Parameters of possible seismic loads were also defined on the basis of microseismic zoning methods. There is substantiated that seismic loads are the most significant dynamic loads. Amplitude technological loads are insignificant and constant. However they can cause the oscillations of high-angle conveyor in dangerous directions. That's why, all possible types of dynamic loads should be taken into account during the calculations of eastern edge stability.


Malgin O.N.,State Enterprise Navoi Mining and Metallurgical Combine | Shelepov V.I.,Constructor and Design Institute of Coal Industry UkrNIIproekt | Larionov E.D.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

Since 2007, experimental exploitation of high-angle conveyor loader (mined rock lifting height of 30 m) has been carried out at Muruntau deep open pit of Navoi Mining and Metallurgical Combine. For the purpose of ore transporting, the high-angle conveyor elevator was designed with its following installation at the pit edge on the basis of positive experience of this loader functioning. Productive capacity of this elevator is 3500 t/hour, and its united flight deeping is 270 m. The elevator is continued by the main conveyor line on the surface. This line delivers ore to the load-store facility of enterprise. Industrial exploitation of the whole complex of equipment has begun since June 21, 2011. Since then, this complex has been successfuly functioning: its technical production capacity has been already increased. According to this, mined rock motor transportation consumptions were significantly decreased. Designing of open pit's transport system on the basis of high-angle conveyor was carried out by institute «UkrNIIproekt». The complex of equipment was manufactured by Novokramatorsky Mashynobudivny Zavod (Ukraine). Building and assembly jobs were carried out by forces of Navoi Mining and Metallurgical Combine.


Rakhimov V.R.,Tashkent State Technical University | Pyankov A.G.,Tashkent State Technical University | Shemetov P.A.,State Enterprise Navoi Mining and Metallurgical Combine | Petrosov Yu.E.,Tashkent State Technical University
Gornyi Zhurnal | Year: 2013

An integral assessment of technical and economic indices of «open-ended» technology of the whole cycle of final marketable products manufacturing (subject to the influence of each technological conversion on the others) is an urgent task in the following conditions: exhausting of reserves of rich ores with development depth; more significant involving of poor and off-balance ores and anthropogenic splashes into extraction and processing; complex usage of mineral raw material resources. Researches and analysis of energy intensity of the basic stages of mining production and preparation of ore mass to concentration were carried out by the joint collaboration of scientists of Tashkent State Technical University and specialists of largest Uzbekistan open pits (Muruntau gold ore open pit and Kalmakir copper ore open pit). According to results of these researches, the numerical values of power inputs were stated in terms of developed rock strength and average size of blasted ore mass in Muruntau open pit. The basic conclusion of researches became the substantiation of technological and economic feasibility of redistribution of energy consumptions by intensification of drilling and blasting crushing of durable rock massifs. A new technology of intensive drilling and blasting crushing of ore mass is developed, proposed and directed on obtaining of average size of parts of broken ore mass, optimal for following conversions of mining production and ore mass processing.


Sanakulov K.S.,State Enterprise Navoi Mining and Metallurgical Combine | Umarov F.Ya.,Tashkent State Technical University | Shemetov P.A.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

Together with increasing of open pit's depth, there takes place the sharp increasing of amounts of transported mined rock and range of its wheeled transport delivery to the surface. This increasing makes a negative influence on economic efficiency of opencast mining of this deposit. In this situation, transfer of open pit to the shortest way of mined rock delivery is a fundamental compensating decision. The shortest way of delivery of mined rock is carried out by installation of conveyor elevator on the pit edge, with preliminary crushing of transport material. Such transfer was realized at the Muruntau open pit (Navoi Mining and Metallurgical Combine). In 1984, the traditionnaly-designed elevator (elevation angle is 15°) was installed at this open pit for the purpose of overburden rocks transporting. Such elevator made it possible to provide the long-term efficient activity of enterprise. However, it gradually started to hold the development of mining at its installation boundary. As a result, it could not solve the problem of ore transporting from more and more deepen horizons of open pit. Unique high angle transporter (37°) with mined rock lifting height of 270 m and productivity of 3500 t/hour was introduced in 2011 on another edge of Muruntau open pit. Firstly, this transporter was oriented only on ore transporting. Nowadays, it became used for transportation of overburden rocks, by including of approximately half amount of the whole open pit materials traffic. Introduction of high angle conveyor at Muruntau open pit helped to realize the significant improvement of technical and economic indices of open pit's operation. Introduction of such facility to the deeper depth is planned to be realized.


Rakhimov V.R.,Tashkent State Technical University | Shemetov P.A.,State Enterprise Navoi Mining and Metallurgical Combine | Snitka N.P.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

Methods and technical means of formation of mineral raw material flow during the joint extraction of natural and anthropogenic mineral raw materials are shown by the example of open cast mining of Muruntau and Myutenbai deposits. Both deposits have significant sizes and open-pit mine reserves in horizontal and vertical projection. These deposits are characterized by complex structure of ore bodies with balance and off-balance ores and inclusions of conditionally waste rocks in one mine section. Specific character of these deposits substantiated the following operations: separate extraction, transporting and warehousing of ore mass into four grades, together with management of qualitative and quantitative parameters of open pit's mineral raw material flow and regulation of intensity of works in bottoms; wide range of mining operations both in vertical projection of open pit and in its working area; formation of mineral raw material flow not only for processing from open pit, but also for processing with usage of reserves of external stock locations of off-balance ore, with simultaneous increasing of its part in ore flow structure. On the basis of the carried out researches, an urgent scientific and practical task was solved for substantiation of technology and organization of formation of mineral raw material flow and its processing to marketable metal during the joint development of natural and anthropogenic deposits. The deposits are developed by realization of improved system of continuous projecting and planning of open cast mining. Mastering of the proposed system in joint open pit «Muruntau - Myutenbai» (Navoi Mining and Metallurgical Complex) makes it possible to prolong the period of effective (profitable) operation of «open pit - plant» complex and provides the obtaining of total economic effect of near 2.5 mln USD per year.


Muzafarov A.M.,State Enterprise Navoi Mining and Metallurgical Combine | Temirov B.R.,State Enterprise Navoi Mining and Metallurgical Combine | Sattarov G.S.,Navoi State Mining Institute
Gornyi Zhurnal | Year: 2013

This article considers the conditions and prospects of ecological and radioecological researches of mining and metallurgical productions. Departments of Navoi Mining and Metallurgical Combine participate in anthropogenic pollution of environment. The following activities were carried out for the qualitative assessment of importance of this participation: ecological control of soil and air; ecological control of drinking, sewage and underground waters; assessment of annual total effective dose in geotechnological mines, production facilities and nearby settlements; analysis of state and rational usage of water resources; assessment of anthropogenic influence of gold extraction plants on environment; status and methods of lands recultivation; assessment of anthropogenic participation in uranium production and tailing dunps. Results of multi-year observations are summarized along with definition of ways of improvement of ecological condition in the area of activities of Navoi Mining and Metallurgical Combine. There is estimated the correspondance of final products (uranium) to international requirements, which are presented in limitation of specific activity.


Pastikhin D.V.,Moscow State Mining University | Tolipov N.U.,State Enterprise Navoi Mining and Metallurgical Combine | Zairov Sh.Sh.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

The following composition of excavator-automobile complex was considered in the period of researches and analysis: two excavators EKG-10; one excavator EKG-12,5; two excavators EKG-15; ten mine dump trucks R-170; thirteen mine dump trucks BelAZ-7513. Productive capacity of the complex is 11430 thousands m3 per year. For the purpose of provision of maximal productivity of applied excavator-automobile complex, the ratio of passive and total fields of operations should be maintained at the level of 0.6, according to the considered regularities and results of analysis of design of working board of eastern section of open pit (third area). Estimation of indices made it possible to find the method, completely corresponding to accepted limitations and criteria, where the length of passive front is 27.4 km, which is 0.6 from the complete length of benches front on the section. Average width of areas of active and passive reserves is 4.15 and 13.9 m, respectively. Redistribution of reserves makes it possible to do the following operations: additional creation of haulage benches at five horizons; provision of the through movement of motor transport with decreasing of transporting distance for separate technological complexes by 0.6 m. The chosen method became the basis for construction of both the diagram of distribution of active and passive reserves on the section benches and recommended design of working edge. According to the calculations, bringing of design of working edge of the Muruntau open pit's third area to the proposed methodology provides the increasing of productivity of excavator-automobile complex by 8.2%.


Leu S.V.,State Enterprise Navoi Mining and Metallurgical Combine | Sadinov Sh.M.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

Safety of mining operations in Muruntau open pit is provided by geodynamic monitoring system, which includes the following operations: - instrumental mine surveying and geophysical methods of research of near-edge and dump massifs for the purpose of revelation of areas and sections of deformation development; - estimation of deformation development scales; - estimation of possible consequences of deformation development for open-pit functioning; - organization of stationary instrumental observations in the most dangerous deformation areas; - division of open pit edges into various grade steadiness parts, based on attribution of similar geological structure sections and weakening factors to unstable, conditionally unstable and stable areas; - forecasting of deformation appearance on the basis of analysis of data about geological construction of near-edge massif, obtained as a result of monitoring. Two interconnected aspects are included in provision of slopes stability during the development of complex-structure deposits in rocks by deep open pits: - estimation of stability grade on the basis of geomechanic calculations; - control of development of deformation processes in near-edge massif. Geophysical researches are carried out with application of two auxiliary methods: vertical sounding method and seismometry method. These methods are used for the definition of structure of massif and its stress and strain state. Since 1979 till nowadays, there have been held the scientific and research works for estimation of pit edges stability. Obtaining of scientifically based information is the final object of researches for the purpose of provision of maximal technical and economic efficiency and safety of mining operations. This information makes it possible to do the following operations: - forecasting of development of deformation processes; - development of measures for prevention of detrimental deformations or decreasing of their negative impact on open pit's operation mode (on the basis of obtained data).


Snitka N.P.,State Enterprise Navoi Mining and Metallurgical Combine | Madaminov Sh.A.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

Economic and technological dominance of the world's leading countries is based on the science intensive and high-technological branches of industry. This dominance is provided both by the self scientific-engineering potential of these countries, and by the infrastructure, which makes it possible to carry out the constant and system creation and introduction of innovations. Creation of national innovation system is one of the priorities of formation of innovation economy of Republic of Uzbekistan. Innovation activities of enterprises (including career-oriented, technological, scientific and organization improvement) are the important elements of this system. Navoi Mining and Metallurgical Combine works out an innovation development model for the purpose of guaranteeing of production volume increasing and cost saving. This model foresees the realization of the following activities: improvement of the Combine's management; formation of essential structures of development and control of innovation process; creation of environment and culture for the purpose of involving of the whole staff of the Combine into innovation activity; arrangement of close collaboration of the Combine's offices and scientific departments; planning of researches according to the development priorities of the Combine; active introduction of results into the practical training; purposeful training of specialists, which can provide the development, management and introduction of scientific achievements. Realization of innovation development strategy of Navoi Mining and Metallurgical Combine makes it possible to increase the economic efficiency of production and investment attractiveness of the Combine during the provision of sustainable social-economic development and essential level of production and ecological safety.


Khalikulov E.Kh.,State Enterprise Navoi Mining and Metallurgical Combine
Gornyi Zhurnal | Year: 2013

Central Mining Department is the largest production facility of Navoi Mining and Metallurgical Complex. This facility has the following basic areas of activities: open cast mining of Muruntau gold deposit at Muruntau open pit; extraction of gold by heap leaching method; open cast mining of Dzheroi-Sardarinskoe phosphorites deposit at Tashkura open pit; manufacturing of phosphorite concentrate and ground phosphate rock; processing of gold-containing and phosphorite ores at Mining and Metallurgical Plant; works for mineral reserves increasing and following development of mineral raw materials base. Scientific investigations with participation of profile institutes of Uzbkistan, Russia and Ukraine are carried out for the purpose of improvement of mining technology. Central Mining Department of Navoi Mining and Metallurgical Combine has the following priority measures: development of Muruntau open pit to the depth of 950-1000 m; open-cast and underground mining of contour reserves of Muruntau deposit; involving of small-scale and anthropogenic mineral objects into development; development of gold heap leaching shop with re-orientation for processing of poor and off-balance ores of inner stripping of Muruntau open pit; construction of facilities for production of complex mineral ferlitizers on the basis of Dzheroi-Sardarinskoe deposit.

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