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Date submitted2009-07-10
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Date accepted2009-09-03
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Date published2010-04-22
Lateral earth pressure in rock mass
- Authors:
- A. G. Olovyanny
The stress state of rock mass is determined by weight of overburden and the lateral earth pressure. It was stated that the stress state of rock mass has been originated with contribution of the lateral earth pressure in which the important role play the viscoelastic properties of rocks was obtained, which gives more precise assessments of stress state in rock mass than the determined ones with account of only elastic behavior.
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Date submitted2009-07-09
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Date accepted2009-09-03
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Date published2010-04-22
The stress-strain state of the massive of the loose ores in the Yakovlevsky deposit around the minings which were drilled with the combines or with drilling-blast technology
The article presents the consistent patterns of the changes in stress-strain state of the massive by the minings of the first stage of protective overlapping in the Yakovlevsky deposit. The change of the stress-strain condition of the rock massive, which is weaked by the mining was determined by the method of finite elements. The stresses distribution in the massive, the displacement of the contour of the minings, the size of conditional zones of non-linear deformations has been obtained. For stoping passes at the first stage the cutting with combine and application of fastening with the anchors has been suggested.
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Date submitted2009-07-28
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Date accepted2009-09-30
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Date published2010-04-22
Organization and conduct of monitoring of geodynamic processes at the Grushovaya transshipment oil base of the Chernomortransneft Co
- Authors:
- A. P. Skakun
The complex of geophysical methods and equipments for continuous and periodic monitoring of the influence of present-day geodynamic processes on support and rocks along the route of technological tunnel of3300 mlong within the zone of high seismicity has been developed.
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Date submitted2009-07-24
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Date accepted2009-09-19
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Date published2010-04-22
Efficient assessment of stress state of coal seams liable to rock bursts
- Authors:
- F. P. Ivchenko
- N. V. Krotov
The article deals with the method for effective evaluation of stress state and rock burst hazard of sections of coal seams by the predicted output of drilling fines. The suggested engineer solution, i.e. the program modulus «Prediction» allows to represent the formation of the support pressure zone in the marginal part of the seam (or in a mine working) and to control the potential pattern of rock burst hazard manifestation in a mine working under various geological and mining conditions.
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Date submitted2009-07-03
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Date accepted2009-09-05
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Date published2010-04-22
Diagnostics of stability of a mine working in a protective pillar
Consideration is given to the results of assessment of stability of the main transportation way of horizon of undercutting at the «Skalisty» ore mine of the Norilsk Co. – connecting slope. The mathematical modeling of the method for a working protection with a protective pillar has shown that this method will not ensure the stability of the mine working for the whole period of its exploitation. A new method was suggested for protection of the working with the use of preliminarily created stress relieving zone during formation of the packing massif.
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Date submitted2009-07-02
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Date accepted2009-09-30
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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.
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Date submitted2009-07-02
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Date accepted2009-09-11
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Date published2010-04-22
Application of solid oxygen-containing substances for higher productivity of oil wells
- Authors:
- A. T. Karmansky
- E. V. Goncharov
The technological principles and results of realization of exothermal reactions in oil-and-gas productive wells are presented. Unique comfinations of chemical reagents on base of chlorates, saltpetres, etc ensured the simplicity, low prices and efficiency of technological operations for intensive influxes of oil and gas. High efficiency is reached not only due to reduction of oil viscosity and removal of paraffin and asphaltenes, but also due to re-forming of the reservoir rocks by relief of rock pressure and extension of fractures.
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Date submitted2009-07-05
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Date accepted2009-09-27
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Date published2010-04-22
The methods of strength definition for the rock mass properties applying to the open mining cut
- Authors:
- A. A. Pavlovich
The review of factors influencing rock mass strength is given. Methods of definition for sample strength changeover to rock mass are considered in the article.
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Date submitted2009-07-16
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Date accepted2009-09-10
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Date published2010-04-22
Influence of tectonic stresses and geological disturbances in rock mass on the parameters of stress-strain state around mine workings
- Authors:
- D. N. Petrov
- I. S. Dolgy
- V. I. Ochkurov
The results of mathematical modeling of formation of stress fields in stratified rock mass under various vertical and horizontal stresses relation are presented. An assessment of influence of the presence and position of a great geological disturbance on a stress state around a mine working is considered.
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Date submitted2009-07-06
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Date accepted2009-09-01
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Date published2010-04-22
Evaluation and prediction of zones of inelastic deformations around mine workings
- Authors:
- V. D. Baryshnikov
- L. N. Gakhova
Using the in situ observation results and the Coulon – Mohr criterion, the authors have obtained the criteria for the determination of probable failure zones in rock masses. An example is given of prediction of stress state of advanced ore extraction of the kimberlite pipe with using the ascending method of mining.
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Date submitted2009-07-05
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Date accepted2009-09-25
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Date published2010-04-22
Active methods for control of geomechanical state of rock mass in coal deposit mining under complicated geological-and-mining conditions
- Authors:
- F. N. Voskoboev
- Yu. A. Semenov
- V. A. Zvezdkin
The paper presents the main technologies, characteristics, schematic diagrams and parameters of active methods for control of geomechanical state of technogenic rock mass, domain and technical-and-economical efficiency of their industrial application.
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Date submitted2009-07-04
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Date accepted2009-09-10
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Date published2010-04-22
Provision of safe coal mining with due account оf cleanup works at adjacent seams
- Authors:
- M. A. Ilyashov
During planning of mining works with coal series it is important to take into consideration mining conditions of each mine layer, to determine presence of natural and technogenic abnormal areas at its place and to appreciate their potential level of influence on the increase of rock pressure manifestations in the development and productive workings. In comparable conditions the most negative manifestations of rock pressure can be observed in roadways of neighboring low layer, when they are disposed in range of mutual action of abnormal areas of natural and technogenic origins.
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Date submitted2009-07-19
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Date accepted2009-09-11
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Date published2010-04-22
Calculation of supports of parallel workings divided with yieldable pillars at anthracite seams
The article presents the methods for calculation of supports of parallel workings divided with yieldable pillars at anthracite seams. Consideration is given to the development of experimental data card for protection and maintenance of paired conveyor entries with using the steelpolymer anchor supports.
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Date submitted2009-07-20
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Date accepted2009-09-24
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Date published2010-04-22
Methods for presetting of artificial yielding to anthracite pillars
- Authors:
- S. G. Stradanchenko
- N. V. Titov
- Yu. V. Turuk
The article contains the results of in situ investigation of influence of yielding pillars on the stability of protected workings with different modes of preset yielding. Graphs of roof movements in the workings protected with yielding pillars, are given.
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Date submitted2009-07-16
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Date accepted2009-09-28
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Date published2010-04-22
Efficient numerical methods for geotechnical problems
- Authors:
- M. A. Karasev
This article give a general overview of methods to solve large scale geotechnical problems, nonlinear high deformation and plastic problems, self contact of strata and application of high performance computing.
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Date submitted2009-07-17
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Date accepted2009-09-09
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Date published2010-04-22
Numerical modelling of the lining stress stateof column stations without lateral platforms
- Authors:
- D. N. Petrov
- P. A. Demenkov
- D. A. Potemkin
Geomechanical forecast of stress-strain state of deep underground subway station is considered. Static work of structures of subway station based on complex approach is shown, including in situ testing and numerical modelling (finite elements method) during different stages of construction.
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Date submitted2009-07-06
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Date accepted2009-09-18
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Date published2010-04-22
Simulation of the stress-strain state forming around the vertical mine in the field of tectonically fractured massif
- Authors:
- D. Yu. Dordzhiev
The influence of the front clean up of stress-strain state around a vertical mine of a tectonically fracture massif for a uranium deposit «Antey» is considered. By means of computer simulation it’s have been confirmed by field observations.
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Date submitted2009-07-09
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Date accepted2009-09-01
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Date published2010-04-22
Method of calculation stability of the open pit edges
- Authors:
- A. V. Chebakov
During the opencast mining operations with bating and opening-up of new horizons as a result of the process duration in the near-edge rock mass, fatigue accumulates, which leads to slope deformations in the form of slide rocks, rock falls, roof breaks, and, in some cases, large-scale landslides. Given that the open pit edges are complex engineering structures, on the state of which mining operations effectiveness and safety depend, their stability control is a very urgent problem.
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Date submitted2009-07-25
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Date accepted2009-09-13
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Date published2010-04-22
Specific behaviour of prefabricated tunnel linings
- Authors:
- E. A. Karasev
Analysis of different methods to model prefabricated tunnel lining is done. The description of main advantages and disadvantages of existing method is given. Method of detailing stress state prediction of prefabricated lining based on 3d finite elements method with complicated interaction between lining segment and soil is proposed.
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Date submitted2009-07-18
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Date accepted2009-09-30
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Date published2010-04-22
Account of stress gradients in rock mass in designing of mining constructions
- Authors:
- S. V. Suknyov
- M. D. Novopashin
Using the gradient approach the criteria of shear and tensile cracking are developed in compression under conditions of stress concentrations near mine workings. Considering the size effect, a function type of local strength is determined, expressions for critical pressure are derived and comparison between analytical and experimental data is performed.
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Date submitted2009-07-21
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Date accepted2009-09-27
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Date published2010-04-22
Study of gas-and geodynamic state of technogenically changeable coal rock mass
- Authors:
- A. D. Ruban
Intensification and concentration of the mining works increases substantially the risk of geo- and gasdynamic effects arising within the coal mines. Herewith are presented the results of the analytic and experimental studies on stress-strain state of rock mass due to technogenic impact. Under such conditions a potential avalanche destruction of coal rock mass may occur. Some criteria for evaluation of gas-dynamic danger for rock mass, for active stopes and development faces are given. The computer-aided system for monitoring of hazard of gas- and geodynamic phenomena in mines is suggested.
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Date submitted2009-07-22
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Date accepted2009-09-18
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Date published2010-04-22
Higher grade filling due to horizontal layers extraction in Yakovlevsky ore deposit
A complex of technology and organization methods to higher grade filling due to horizontal layers system of extraction rich ferrous metal ores for various stages of mining is presented.
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Date submitted2009-07-18
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Date accepted2009-09-08
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Date published2010-04-22
Influence of rock disturbance on their rheological properties
Complex investigations have been conducted of rheological properties of undisturbed and disturbed rocks under laboratory conditions in the modes of creeping, relaxation and lateral pressure. It was stated that the rheological properties of disturbed rocks substantially differ from those properties of undisturbed rocks. Recommendations are given for the use of the obtained results in solution of tasks in mining geomechanics.
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Date submitted2009-07-22
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Date accepted2009-09-14
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Date published2010-04-22
Cycles of the Earth and Sun – the important factor оf activity of geodynamic processes at coal- and ore mines
- Authors:
- A. N. Shabarov
- B. G. Tarasov
The paper contains the substantiation of the determinable role of the cosmos in rhythms of natural and technogenic phenomena at coal- and ore mines. The latent and explicit periods of up-to-date phase of attenuation of the solar constant in the cycle since 1982 to 2070 are shown, as well as the geodynamic consequences of this depression. This paper seeks to give rise to discussion of this problem for working out of coordinated actions in the decrease of geodynamic risks.
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Date submitted2009-07-24
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Date accepted2009-09-16
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Date published2010-04-22
Determination of indices of strength certificate оf rocks using the method of specimens failure with spherical indentors
- Authors:
- V. A. Korshunov
- Yu. M. Kartashov
- V. A. Kozlov
The method has been developed for the determination of indices of strength certificate of rocks using the technique of specimen’s failure with oncoming spherical indentors. This method is based on the assessment of ultimate stresses acting in the tensile plane and within the zones of failured rocks under action of indentors at the moment of sample splitting. Formulas were obtained for calculation of indices of strength certificate, i.e. cohesion and angles of internal friction under tensile compression and nonuniform triaxial compression, ultimate strength in uniaxial compression and tension. This method is applicable in situ conditions.