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| ISSN 0536-1028 (Print) ISSN 2686-9853 (Online) |
Justifying the types and methods of adapting the mining technological system of a mining enterprise to changing conditions of underground mining
DOI: 10.21440/0536-1028-2019-6-14-20
Smirnov A. A., Nikitin I. V. Justifying the types and methods of adapting the mining technological system of a mining enterprise to changing conditions of underground mining. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 6: 14–20 (In Russ.). DOI: 10.21440/0536-1028-2019-6-14-20
Research aim is to study the process of adapting the mining and technological system of a mining enterprise to the changing external and internal conditions of deep-seated deposits underground mining. By the term mining and technological system of a mining enterprise we mean a set of interrelated technological processes and organizational solutions for mineral extraction from the subsoil and its further dressing.
Research methodology. The paper uses a complex method of research, which includes the analysis of conditions and generalization of the experience of underground mining of deep ore and non-metallic deposits, systematization and assessment of conditions and factors affecting the functioning of the mining and technological system of the mining enterprise, the establishment of types and development of adaptation methods based on the method of scientific induction.
Results. The substantiation of types (micro- and macroadaptation) and methods (reservation or
diversification of production, regulation or modernization of production, organizational changes
or restructuring) of adaptation of mining and technological system of the mining enterprise to the changing external economic (market), natural (mining and geological), production (technological), social and environmental conditions of underground mining of deep-seated deposits on the basis of accounting and management of factors causing transition processes.
Results application area. The results can be used in the feasibility study and design of mining and technological systems of mining enterprises with underground method of ore mining (for example, in the mining of deep-seated iron ore deposits).
Key words: deep-seated deposit; underground mining; adaptation; transition process; systematization; economic stability.
Acknowledgements: The article has been prepared following the researches for the project 18-5-5-10 of UB RAS Program for basic research.
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Received 17 May 2019
Investigating the parameters of dispersion in the plane system of charges at granular quartz deep mining
DOI: 10.21440/0536-1028-2019-6-5-13
Sokolov I. V., Rozhkov A. A. Investigating the parameters of dispersion in the plane system of charges at granular quartz deep mining. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal Gornyi zhurnal = Mining Journal. 2019; 6: 5–13. DOI: 10.21440/0536-1028-2019-6-5-13
Introduction. There is much concern about raw material overgrinding as a result of blasting when mining granular quartz. The main blasting method of deep mining is borehole blasting with rings of continuous charges. The main drawbacks of the method include nonuniform distribution of explosives along the plane of the broken layer and the fact that the significant energy of continuous charges is spent on the shattering effect which automatically overgrinds the material in the area nearest the blast. Research aim is to develop the technology of blasting and optimize its parameters ensuring the reduced output of overgrinded quartz fraction.
Methodology includes the development and application of a mathematical model of drilling and blasting parameters forecast in granular quartz deep mining.
Research concept. A technology of breaking has been proposed by way of solution to the given problem. The technology lies in the concept that the uniformity of explosive energy concentration distribution in the broken layer is ensured by charges dispersion by air gaps and the particular order of their arrangement in the plane of the ring. To implement the technology, a method of forming dispersed charges in deep upholes has been developed; the method does not require additional efforts and equipment.
Results. A special technique has been created, which makes it possible to determine the parameters of dispersion ensuring the relevant specific consumption of explosives along the whole plane of the broken layer. The dependence between the output of the overgrinded quartz fraction and the parameters of dispersion in the plane system of charges has been determined. Engineering and economic evaluation of breaking technology options has been carried out as compared to the conventional one. Potential economic benefit has been estimated from the developed technology application for 1t of produced ore.
Key words: granular quartz; blasting; dispersed charge; borehole ring; air gap; specific consumption of explosives.
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Efficiency improvement of quartz production by mean of using two-dimensional system of distributed charges | 56 |
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