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Date submitted2008-07-28
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Date accepted2008-09-09
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Date published2009-02-18
Algorithm of calculation of a crack in a rock at application of a borehole extended shaped charge
- Authors:
- A. P. Gospodarikov
- V. N. Kovalevskiy
This article is devoted to application of the cumulative charges on the open-pit and underground minings. The analytical response of the crack length on the geometrical parameters of the charge, hole and of the properties of rocks is invented.
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Date submitted2008-07-14
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Date accepted2008-09-10
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Date published2009-02-18
Method of operative estimation of quality of rock crushing by explosive method
- Authors:
- A. A. Dobrynin
- I. A. Dobrynin
The method of an operative estimation of quality of crushing of rocks is offered by explosive way by means of modern technology of ground laser scanning is offered.
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Date submitted2008-07-16
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Date accepted2008-09-23
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Date published2009-02-18
Elastoplastic problem about stretching of a plane with a circular hole
- Authors:
- G. N. Zhurov
- V. N. Kovalevskiy
Elastic – plastic balance of the hills massif is examined under the Stavrogin's condition of destruction under symmetric boundary conditions in view of the heterogeneity of a file arising at artificial freezing of friable watery breeds with the help of freezing columns. Formulas for definition of pressure and movings to plastic and elastic areas are received. The border between elastic and plastic areas is found. The area of existence of the decision is determined.
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Date submitted2008-07-06
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Date accepted2008-09-24
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Date published2009-02-18
Model of effective explosive crushing of rocks at quarries
- Authors:
- G. M. Kryukov
On the basis of experimental data and theoretical generalization parities for calculation of parameters of the chisel and explosive works, providing the set degree of explosive crushing of mountain weight are offered by manufacture of mass explosions on quarries in view of physico-technical properties of rocks and thermodynamic parameters of explosives.
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Date submitted2008-07-13
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Date accepted2008-09-18
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Date published2009-02-18
Evaluation of efficiency of rock fracturing processes by explosion of elongated explosive charges based on the results of experiments on Plexiglas blocks
- Authors:
- G. M. Kryukov
- V. V. Stadnik
- Yu. V. Glazkov
Results of researches on explosion of microcharges of explosives in blocks of an organic glass are resulted. On the basis of the received data and a theoretical substantiation laws of processes of deformation and destruction of blocks from artificial materials are established.
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Date submitted2008-07-12
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Date accepted2008-09-22
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Date published2009-02-18
Obtaining of peat products at drying in spreading and on slopes of multi-cycle build-up rolls
- Authors:
- A. N. Vasiliev
- R. M. Kozlov
The technology of reception of qualitative peat production under the circuit with formation multicyclic increased valcov is considered. The offered technology allows to raise quality of production and to lower losses from 20 up to 7 %. Results of research of influence of weather conditions for various types of production are resulted.
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Date submitted2006-09-14
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Date accepted2006-11-17
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Date published2007-09-11
From natural lumpiness in nature to rock fracture model
- Authors:
- L. N. Fedorov
- M. L. Bruk
The paper attempts to provide a schematic representation of rock fracture by hypothetically reconstructing the rock structure by mentally assembling it from individual fractions of the entire granulometric structure.
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Date submitted2006-09-17
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Date accepted2006-11-01
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Date published2007-09-11
Method of development of rocky and semi-rocky type deposits of varied block structure
The influence of blockiness of rocks on the efficiency of field development is investigated; the concept of the category of blockiness of rocks from the position of a broad understanding of its essence is substantiated; the structural methodology of field development is given.
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Date submitted2006-09-23
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Date accepted2006-11-25
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Date published2007-09-11
Technology of rational fracture of differing strength rocks
Substantiation of the choice of the technology of rock destruction during the development of deposits by open-cut method is given, taking into account its adequacy to the properties of rocks and a set of requirements of economic, social, environmental, legal and other important aspects.
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Date submitted2006-09-13
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Date accepted2006-11-22
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Date published2007-09-11
Modeling of rock massive fracture in the process of moving of a cleaning face with different speed
- Authors:
- M. G. Mustafin
The influence of speed and discreteness of bottom-hole movement on deformation of rock massif and earth surface, on the character of rock massif shearing and the form of its destruction is considered.
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Date submitted2006-09-13
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Date accepted2006-11-28
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Date published2007-09-11
Management of rock pressure and gas emission in the excavated space during the development of coal seams at great depths
- Authors:
- A. V. Montikov
The necessity of development of new principles of approach to organization of degasification works at coal mines and directions of improvement of technological schemes at development of high-gas-bearing coal seams at great depths is grounded. The technological scheme of working out of a mining area with a direct flow ventilation scheme, with isolation of excavated space and protection of preparatory workings with cast strips from quick-hardening materials is offered.
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Date submitted2006-09-28
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Date accepted2006-11-19
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Date published2007-09-11
Energy efficiency of rock destruction during explosion of explosives with different detonation characteristics
- Authors:
- M. G. Menzhulin
- V. E. Brovin
The efficiency of rock destruction by explosion of explosives also depends on the dissipation energy. When using explosives with different detonation characteristics, the dissipation energy changes significantly in the crushing zone, which in turn affects the overall destruction efficiency.
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Date submitted2006-09-12
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Date accepted2006-11-22
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Date published2007-09-11
Increase of environmental safety at ore mining by reduction of technogenic load on biosphere
The environmental situation of the biosphere of the territories of mining and ore mining enterprises is analyzed. To reduce the technogenic impact on the environment during ore mining it is proposed to use universin. Application of universin reduces dustiness of air from dusty surfaces of rock dumps and tailing dumps for the period from 10 to 30 days and reduces the load on water environment.
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Date submitted2006-09-10
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Date accepted2006-11-20
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Date published2007-09-11
Laser agglomeration of ultra-disperse gold from mineral and technogenic associations of high clayey sands
New non-traditional methods of extraction of hard-to-enrich valuable component from mineral raw materials using laser radiation are considered. Theoretical and experimental studies have shown the possibility of integration of precious metal particles during their treatment with laser radiation taking into account their properties and further extraction by traditional methods.
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Date submitted2006-09-02
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Date accepted2006-11-26
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Date published2007-09-11
Management of rock properties in drilling and blasting processes
- Authors:
- O. G. Latyshev
- I. S. Osipov
- O. A. Anokhina
The elastic-plastic equilibrium of a rock massif is considered taking into account only the forbidden state. Formulas for determining stresses and displacements in the elastic and forbidden zones are obtained. The boundaries between the forbidden zone and the elastic zone are found.
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Date submitted2006-09-20
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Date accepted2006-11-17
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Date published2007-09-11
Elastoplastic problem of stress distribution around mine workings with consideration of only the limit state
- Authors:
- G. N. Zhurov
- V. N. Kovalevskii
The elastic-plastic equilibrium of a rock massif is considered taking into account only the forbidden state. Formulas for determining stresses and displacements in the elastic and forbidden zones are obtained. The boundaries between the forbidden zone and the elastic zone are found.
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Date submitted2006-09-03
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Date accepted2006-11-19
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Date published2007-09-11
About one algorithm of mathematical model construction for optimization of design parameters of elongated shaped charges
- Authors:
- A. P. Gospodarikov
- V. N. Kovalevskii
This paper deals with issues related to mathematical modeling of optimization of stretched shaped charge parameters on the basis of similarity test. By means of the numerical method of random search the necessary rational parametric variables for designing rational designs of stretched shaped charges are obtained.
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Date submitted2006-09-08
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Date accepted2006-11-06
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Date published2007-09-11
Theoretical estimates of the PQSW theory of rock fracture processes by camouflage explosion of elongated charges
- Authors:
- Yu. V. Glazkov
- G. M. Kryukov
- S. N. Zhavoronko
A calculation scheme based on the phenomenological quasi-static-wave (PQSW) theory is proposed for determining the parameters of fracture zones during the explosion of camouflage charges. The relations of change of rock loading parameters from the structure of explosive charges are obtained.
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Date submitted2006-09-12
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Date accepted2006-11-04
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Date published2007-09-11
Assessment of changes in properties and state of rocks as a result of intensive dynamic loading
A methodology has been developed and experimental studies have been carried out to evaluate structural changes in rock samples in the near zone of explosion action. Using optical microscopy and X-ray structure analysis, it was found that the microstructure of rocks changes during the passage of shock waves: the dispersion of mineral grains increases, and the density of micro-disturbances increases by an order of magnitude.
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Date submitted2006-09-08
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Date accepted2006-11-14
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Date published2007-09-11
Experimental study of the influence of rock fracture filler properties on their dynamic deformation
Destruction of rocks at impulse loading depending on properties of material substance in a crack is investigated. The relationship between quasi-static deformations of granite blocks and material substance properties has been experimentally established. The developed technique allows to define quasi-static regularities of deformation of block media.
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Date submitted2006-09-29
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Date accepted2006-11-22
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Date published2007-09-11
New ways and methods of dispersing complex-structured massifs of ferruginous quartzites at explosive ore preparation
- Authors:
- V. A. Belin
- V. N. Anisimov
The results of the study of explosive ore preparation of complex-structured massifs of ferruginous quartzites, methods of calculating the parameters of BVR taking into account the peculiarities of the structure and genesis of such massifs, as well as the results of experimental studies of the destruction of ferruginous quartzites and its effect on the indicators of ore preparation are presented.
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Date submitted2006-09-25
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Date accepted2006-11-01
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Date published2007-09-11
Destruction of quartz-bearing rocks under simultaneous pulsed high-gradient electromagnetic and elastic wave impacts
- Authors:
- V. N. Anisimov
The results of investigation of the mechanism of destruction of quartz-bearing rocks (ferruginous quartzites) in strong high-gradient pulsed magnetic fields are presented. The model and mechanism of movement of magnetite grains in nonmagnetic quartz matrix under the action of elastic pulse impact and simultaneous strong pulsed magnetic field with the subsequent process of destruction and dispergation accompanied by the development of microcracks along the grain boundaries of minerals are considered. The results of experimental studies of destruction are given.
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Date submitted2006-09-22
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Date accepted2006-11-05
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Date published2007-09-11
Magnetokinetic effect of destruction of ferruginous quartzite
- Authors:
- V. N. Anisimov
- V. N. Morozov
The results of investigation of degradation of KMA ferruginous quartzite samples in strong high-gradient pulsed magnetic fields with magnetic induction up to 1Tl and pulse duration of 240µs are presented. The effect of micro- and macro-cracks formation, electrical resistance drop by 3-4 orders of magnitude and increase of ultrasonic waves absorption in the range from 0.3 to 5 MHz was found. Known effects do not provide an explanation for the obtained results. It is suggested that the magnetokinetic effect of moving magnetite grains in nonmagnetic quartz matrix under the action of a strong high-gradient pulsed magnetic field with the subsequent process of destruction and dickering, accompanied by the development of microcracks at the boundaries of mineral grains.