-
Date submitted2023-07-05
-
Date accepted2024-06-03
-
Date published2024-12-25
Complete extraction of conditioned ores from complex-structured blocks due to partial admixture of substandard ores
- Authors:
- Bayan R. Rakishev
The paper presents mining-technological substantiation of complete extraction of conditioned ores from complex-structured blocks of benches by mixing a layer of substandard ores of certain sizes. The relevance of the work consists in the development of innovative methods of establishing the parameters of the substandard layer of ores to be added to the conditioned ores. The main problem is to ensure complete extraction of useful components into concentrate from shipped ore with acceptable deviations from the required ones. A new typification of complex-structured ore blocks of the bench has been carried out. Analytical dependences of mining and geological characteristics of complex-structured ore blocks were obtained. Theoretical dependences for determining the main indicators of mineral processing are derived. Analytical dependences for determination of the content of useful component in shipped ore α' – mixture of conditioned ore with the content of useful component α and admixed layer of substandard ore with the content of useful component α'' are offered. For the first time in mining science, a new approach of complete extraction of conditioned ores from complex-structured blocks of benches by grabbing a certain part of substandard ores during excavation, increasing the volume of extracted ore and expanding the extraction of useful components in the concentrate has been substantiated. The increment of useful components can reach 10-15 % of the total volume of extraction, which allows predicting a significant increase in the completeness of mineral extraction from the Earth's interior.
-
Date submitted2022-06-28
-
Date accepted2023-01-19
-
Date published2023-02-27
Influence of mining rent on the efficiency of using natural potential: the paradox of plenty and its Russian specifics
- Authors:
- Arunas A. Lapinskas
The most powerful potential of Russia's natural resources is only partially realized, and determining the reasons for the insufficient efficiency of its use is a current research topic. The exploitation of mineral resources that bring mining rent (primarily oil and gas) gives rise to the so-called “paradox of plenty” (PP), which in some cases manifests itself as a significant slowdown in economic development. The purpose of the article is to clarify the signs, degree and forms of PP manifestation and related problems (“resource curse”, “oil curse”, etc.) in the Russian economy. Since the causes of these phenomena are usually associated with rent extraction and peculiarities of the institutional structure of the economy, the works of leading economists who support the theories of “rent-oriented behavior” and the role of public institutions in the process of the PP emergence were critically analyzed. To determine the signs and degree of PP manifestation and related problems, an analysis of determining the shares of oil and gas in the structure of exports, revenues from their sale in the federal budget, and oil and gas products in the structure of GDP, was made. It is concluded that there are no sufficient grounds for ascertaining clear signs of a “rent-oriented” Russian economy and a “resource curse”; important counteracting factors that refute the unambiguous conclusions about the high degree of PP impact on the Russian economy were identified. The author's interpretation of the role of public institutions, the factors of formation and forms of PP manifestation, the specifics of differential mining rent and its role in the formation of PP are proposed; options for solving problems generated by PP – directions for improving the tax system in the field of oil and gas, etc.; substantiation of the need to develop a strategic state program for diversifying the sectoral structure of the Russian economy; directions for adjusting economic policy in the field of oil and gas industry development, etc.
-
Date submitted2009-10-20
-
Date accepted2009-12-26
-
Date published2010-09-22
Change in presentations on mechanism of rock and tectonic bursts at ore mines at present time
- Authors:
- A. V. Lovchikov
It was shown that presentations on mechanism of rock and tectonic bursts developed for coal deposits, are not suitable for the conditions of ore deposits. Forms of manifestations of rock and tectonic bursts at ore deposits have been determined by experimental data including the artificial initiation of rock bursts in pillars.
-
Date submitted2009-10-01
-
Date accepted2009-12-02
-
Date published2010-09-22
Typization of coalbed-methane deposits оf the kuznetsk basin by promising methane output with using different technologies of gas recovery intensification of coal seams
Experts of «Gazprom promgaz» Co based on international experience of coalbed methane (CBM) mining have developed recommendations for expedient application of various methods of coalbed gas recovery intensification under different mining conditions. It will result in reduction of wells number and increase in methane extraction degree.
-
Date submitted2009-07-29
-
Date accepted2009-09-15
-
Date published2010-04-22
Preconditions for application of supports of different types in productive workings of low-thick gently-pitching deposits in tectonically stressed massif (for conditions of the Karnasurt ore mine)
- Authors:
- A. V. Lovchikov
- A. V. Matytsyn
The paper presents the data on the mining-geological conditions for mining and types of stope supports applied at the Karnasurt Mine, the Lovozersky rare-metal deposit. The peculiar feature of mining conditions is the presence of high subhorizontal tectonic stresses in the rock masses, which make the stope roofs more stable, allowing application of non-reinforced types of support.
-
Date submitted2009-07-02
-
Date accepted2009-09-30
-
Date published2010-04-22
Improved light-weight support types in mine workings
- Authors:
- V. A. Smirnov
- A. E. Khlusov
- B. N. Samorodov
A wider introduction of the efficient light-weight support types into practice, as compared with heavy support, allows to reduce by several times the material capacitance and labour costs in maintenance of stability of mine workings. New types of supports and their parameters have been considered and their application was substantiated.
-
Date submitted2008-10-04
-
Date accepted2008-12-23
-
Date published2009-12-11
Importance of taphonomic researches for solution of biotopes and ecological-facial ostracod communities of some Silurian and lower devonian ostracoda from the South Tien Shan
- Authors:
- E. D. Michailova
Importance of taphonomic researches of ostracod remains from the Middle Paleozoic deposits of the South Tien Shan for solution of ecological-facial and biostratigraphical problems is demonstrated. The allochthonous and subautochthonous ostracod burials of some Silurian and lower Devonian stratigraphic units from the South Tien Shan are described. Six stable pattern types of ecological-facial ostracod communities, connected with different paleoenvironments are presented. The development of communities is traced through lower Silurian and lower Devonian.
-
Date submitted2008-10-06
-
Date accepted2008-12-10
-
Date published2009-12-11
Appearance of entropy principle in distribution оf the gold mass while formation of minable gold mineralization
- Authors:
- S. V. Sendek
The rule of the entropy distributiveness for mass of the metal in gold ores is detected at different scale levels. This regularity is resulted as a consequence of redistribution of the gold and host rocks after their primary conditions. Revealing of those rules may allow reviewing the notions on nature and genesis of gold mineralizaition.
-
Date submitted2008-10-21
-
Date accepted2008-12-10
-
Date published2009-12-11
Prediction and prospecting types of reflection of buried kimberlite fields in terrigenous diamond-bearing rocks
- Authors:
- V. N. Ustinov
On the basis of complex of lithologic-stratigraphic, mineralogical, facial-dynamic, paleogeomorphologic and morphogenetic features of post-kimberlitic terrigenous diamond-bearing rocks and reconstructed synchronous relief three prediction and prospecting types of reflection of buried kimberlite fields are distinguished. It is shown that ranging of diamondiferous territories to various types enables to direct exploration works to discovery of diamond deposits of the certain origin and makes possible to select proper prospecting technique. With the use of suggested criteria of research of promising territories the evaluation of diamond presence in the industrial regions of the Siberian, East-European and African-Arabian platforms is carried out.