Chinakal Institute of Mining

Novosibirsk, Russia

Chinakal Institute of Mining

Novosibirsk, Russia
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Lavrikov S.V.,Chinakal Institute of Mining | Revuzhenko A.F.,Chinakal Institute of Mining
AIP Conference Proceedings | Year: 2015

Based on discrete element method, the authors model loading of a physical specimen to describe its capacity to accumulate and release elastic energy. The specimen is modeled as a packing of particles with viscoelastic coupling and friction. The external elastic boundary of the packing is represented by particles connected by elastic springs. The latter means introduction of an additional special potential of interaction between the boundary particles, that exercises effect even when there is no direct contact between the particles. On the whole, the model specimen represents an element of a medium capable of accumulation of deformation energy in the form of internal stresses. The data of the numerical modeling of the physical specimen compression and the laboratory testing results show good qualitative consistency. © 2015 AIP Publishing LLC.


Lavrikov S.V.,Chinakal Institute of Mining
AIP Conference Proceedings | Year: 2015

The article gives formulation and solution of a problem on stresses and strains in a rock mass around an underground excavation with a specifically preset spiral slip surface (relief slot). The contact conditions include dry friction and cohesion. It is shown that with the contact friction, the load is more uniformly distributed in rocks around the excavation. At certain values of the parameters, it is possible to enhance load-bearing capacity of rocks three times. © 2015 AIP Publishing LLC.


Nazarov L.A.,Chinakal Institute of Mining | Nazarova L.A.,Chinakal Institute of Mining | Karchevskii A.L.,Sobolev Institute ofMathematics | Panov A.V.,Chinakal Institute of Mining
Journal of Applied and Industrial Mathematics | Year: 2013

A method is developed of interpreting the measurement data of the variations of displacements and deformations on the free surfaces caused by carrying out mining works. It allows us to quantitatively estimate the horizontal components of the natural stress fields and elastic characteristics of the constructive elements of the excavation technologies of solid mineral deposits. The method is based on the solution of inverse problems for the system of elasticity equations in the domains of an arbitrary shape. The structure of the proposed target functions is studied; the optimal values are determined of the weight coefficients that provide solvability of the inverse problem as well as the limit level of error in the input data of various types is estimated. © 2013 Pleiades Publishing, Ltd.


Karchevsky A.L.,RAS Sobolev Institute of Mathematics | Nazarov L.A.,Chinakal Institute of Mining | Nazarova L.A.,Chinakal Institute of Mining
Journal of Applied and Industrial Mathematics | Year: 2015

Some algorithm is presented for calculating the concentration of methane from coal slack placed in a sealed container. The algorithm allows us to compute the values of the methane concentration for large times. © 2015, Pleiades Publishing, Ltd.


Nazarova L.A.,Chinakal Institute of Mining | Nazarov L.A.,Chinakal Institute of Mining | Karchevsky A.L.,RAS Sobolev Institute of Mathematics | Vandamme M.,ParisTech National School of Bridges and Roads
Journal of Applied and Industrial Mathematics | Year: 2014

A geomechanical model is proposed for gas emission from a coal bed with block structure. Some coefficient inverse problem is formulated for finding the initial gas content as well as the diffusion and mass transfer coefficients from the measured pressure in a well. The solvability of this problem is tested, and the additional data on the gas-kinetic characteristics of the coal bed are shown to be necessary for the inverse problem to have a unique solution. © 2014 Pleiades Publishing, Ltd.


Nazarova L.A.,Chinakal Institute of Mining | Nazarov L.A.,Chinakal Institute of Mining
Journal of Applied and Industrial Mathematics | Year: 2016

Using the finite elementmethod we designed and implemented a nonlinear geomechanical model of the rock mass in the vicinity of the protective dam of tailing facilities in the permafrost of the Kumtor mine (the Kyrgyz Republic). The model takes into account the information on the structure of the object, the data on the strain-strength, thermophysical and filtration properties of frozen and thawed soil, as well as on the seasonal variations in air temperature. Numerical experiments showed that, under constant external conditions, the invariant properties of the rock mass, and the position of the neutral layer, the zero isotherm separating frozen and thawed rocks reaches a stationary position in 12–15 years after filling the storage; minor damage to the antiseepage screen can lead to a vast destruction area in the body of the dam. Using synthetic data, we demonstrated the solvability of the inverse boundary-value problem of determining the timing and location of damage in the anti-seepage screen from the data of piezometric measurements at several observation wells. © 2016, Pleiades Publishing, Ltd.

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