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Date submitted2012-11-24
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Date accepted2013-01-09
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Date published2013-11-18
Assessment of stress-strain conditions around single development with nonlinear rock-mass deformation
- Authors:
- A. G. Protosenya
- V. I. Semenov
The comparative analysis of the stress-strain state in the circuit and in the vicinity of a single generation of circular and arched curves of elastic and non-linear strain diagram types of rocks. Graphic dependences were obtained by the finite element method, reflecting the nature of the stress-strain state. The actual values of the tangential stress concentration factor on the circuit were obtained using non-linear functions.
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Date submitted2012-11-30
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Date accepted2013-01-19
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Date published2013-11-18
The prediction of underopencast rock mass stress- strain condition during surface-underground development of Koashva deposit
- Authors:
- A. G. Protosenya
- A. N. Shokov
The parameters of underopencast rock mass stress-strain condition for Koashva deposit are defined. The estimation of influence of surface development with opencast on the stress-strain distribution in the mass is revealed. Research is revealed with appliance of finite-elements method.
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Date submitted2012-11-17
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Date accepted2013-01-06
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Date published2013-11-18
Geomechanical analysis of surface settlement trough development due to construction of deep underground pillar station
- Authors:
- P. A. Demenkov
Geomechanical analysis of surface subsidence development due to construction of deep underground station is presented. The station is a typical pylon structure, which is usually used during construction of the latest subway station in Saint Petersburg. Numerical modeling of step-by-step underground station construction is conducted. The results of the numerical analysis allow to predict the magnitude of surface settlement and understand the wide of settlement trough.
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Date submitted2012-11-26
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Date accepted2013-01-05
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Date published2013-11-18
Modelling stressedly-deformed condition of the soil massif including elements of the multipurpose facility with multystoried underground part
- Authors:
- P. A. Demenkov
- D. A. Potemkin
In work the option of the multipurpose underground complex being part of the multystoried high-rise building is considered. The complex settles down in underground part of the building and carries out a base role, replacing with itself the usual plates-but-pile base. Predesigns by a method of final elements taking into account staging of construction of an underground complex and the land high-rise building are executed. Sizes and a picture of distribution of vertical displacements are received as a result of calculations.
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Date submitted2012-11-18
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Date accepted2013-01-04
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Date published2013-11-18
Theoretical basis of geomaterial accounted for induced and inherent anisotropy
- Authors:
- M. A. Karasev
Analysis of anisotropy behavior of clays based on the laboratory testing and publication is presented. Microstructural physical model of interaction between clay aggregates is proposed. Mathematical description of geomaterial based on the microstructural consideration which account for induce and inherent anisotropy is suggested.
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Date submitted2012-11-12
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Date accepted2013-01-05
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Date published2013-11-18
Determination of strength characteristics of concrete with polymer fibro
- Authors:
- D. N. Petrov
The results determine the uniaxial compressive strength and the proportional limit for concrete samples with different content and type of polymer fibers.
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Date submitted2012-11-04
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Date accepted2013-01-13
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Date published2013-11-18
Influence of changes in constructive elements of protective constructions on behavior of the soil massif near deep ditches
- Authors:
- D. A. Potemkin
Complex settlement justification of construction projects, operation, reconstruction of constructions in difficult engineering-geological conditions, including in the constrained city building, became impossible without use of modern computer programs. In work the general approaches and results of modeling stressedly-deformed condition of the soil massif are considered at a postadiyny construction of a ditch for construction of one of hydraulic engineering constructions of St.-Petersburg under protection of a design «wall in soil».
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Date submitted2012-11-16
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Date accepted2013-01-18
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Date published2013-11-18
Prediction of surface settlements duo to construction of underground structures in geological condition of Saint Petersburg
- Authors:
- M. A. Karasev
In work the option of the multipurpose underground complex being part of the multystoried high-rise building is considered. The complex settles down in underground part of the building and carries out a base role, replacing with itself the usual plates-but-pile base. Predesigns by a method of final elements taking into account staging of construction of an underground complex and the land high-rise building are executed. Sizes and a picture of distribution of vertical displacements are received as a result of calculations.
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Date submitted2012-11-07
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Date accepted2013-01-22
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Date published2013-11-18
Modeling of work of elements of the combined box-shaped and pile base in weak soil
- Authors:
- D. A. Potemkin
- P. A. Demenkov
In work results of modeling of work of two options of the multipurpose underground complex being the base of the multystoried high-rise building are considered. The complex plays a role of the combined foundation. Modeling is executed taking into account stage-by-stage construction of underground and land part of the building.
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Date submitted2012-11-16
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Date accepted2013-01-27
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Date published2013-11-18
High technology of underground construction in mega-cities with dense urban
- Authors:
- M. G. Popov
The technology of construction of the mine shaft in urban areas. The technology of construction of permanent roof supports. The main characteristics of the objects and supporting construction. The advantages of each technology, as well as its shortcomings.
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Date submitted2012-11-29
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Date accepted2013-01-07
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Date published2013-11-18
Theoretical basis of geomaterial accounted for induced and inherent anisotropy
- Authors:
- M. A. Karasev
- D. A. Potemkin
The main reasons of soil deformation during deep excavation construction are presented. Numerical modeling of deep excavation construction with an account of support system is conducted. Conclusions on the application area of typical soils models is made.
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Date submitted2012-11-06
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Date accepted2013-01-13
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Date published2013-11-18
Estimation of quality of environment with the use of small pilotless aircrafts
- Authors:
- M. A. Pashkevich
- Yu. D. Smirnov
- A. S. Danilov
As a result of undertaken studies the innovative system of monitoring of atmospheric air, based on the use of the modern systems of measuring, set on pilotless flying vehicles, is worked out, allow to decide actual tasks on the quickly deployed systems of the ecological monitoring after the state of environment. The choice of effective methods of realization of monitoring researches is produced on territories of mining agglomerations. The use of pilotless aircrafts gives an unique opportunity of combination of the controlled from distance and pin methods of monitoring researches, that allows to work with materials various on scales, permission, geometrical and spectral properties and here to get quantitative and quality descriptions of the state of components of natural environment with the complete list of the controlled parameters for the detailed analysis of ecological situation in the districts of mining agglomerations.
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Date submitted2012-11-03
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Date accepted2013-01-15
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Date published2013-11-18
System of ecological monitoring of atmospheric air of mining industrial aglomeration
- Authors:
- M. A. Pashkevich
- Yu. D. Smirnov
- T. A. Petrova
As a result of theoretical researches and experimental researches in Mining University development and introduction of monitoring complex are conducted on the base of pilotless aircrafts with a maximally possible actual load for productive ecological control and automatic stream information transfer more than from 10 channels simultaneously to the surface station of management, equipped by the special software. Drawing on this monitoring complex will allow to conduct zoning of mining industrial aglomeration taking into account the worked out classification of degree technogenic loading.
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Date submitted2012-11-27
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Date accepted2013-01-03
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Date published2013-11-18
Development of geomechanical provision room-and-pillar system of rock burst ore deposits at great depths
- Authors:
- D. V. Sidorov
Considered directions of geomechanical provide room-and-pillar system rock burst ore deposits at great depths, consisting in the modernization and development of the scientific basis of the complex methods for determining the allowable size of worked-out areas, the size of the roof chamber, the size a protective of the pillars, the size of the chamber – pillars, including with regard to their dynamic burst, and creating automated software system for long-term forecasting of the geodynamic state of the ore deposit and shockproof advance planning of activities to improve the safety of mining operations.
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Date submitted2012-11-03
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Date accepted2013-01-01
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Date published2013-11-18
Application of automated software system «PRESS 3D URAL» for predicting bump hazard zones parameters and discharge borehole well in advance of the ore deposit and pillars in difficult geomechanical conditions
- Authors:
- D. V. Sidorov
Examined the scientific and methodological provisions for the safe application of room-and-pillar system in complex geotechnical and geodynamic conditions due to advance the well processing zones bump hazard, the identification of which is achieved on the basis of long-term forecasting of the state of stress and bump hazard using automated software system «PRESS 3D URAL».
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Date submitted2012-11-27
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Date accepted2013-01-26
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Date published2013-11-18
Assessment of cracked area to its destruction in the production of blasting
- Authors:
- G. P. Paramonov
- A. V. Fedoseev
- Yu. S. Gaponov
The method of calculating the net hole charges, based on a combination of fracture zones. The mechanisms of energy transfer and change of stress, depending on the material filling the cracks in the explosive destruction of the fractured rocks.