List of publications in 2015, in which our clients describe examples of the use of our company's products:
V. V. Makarov, A. M. Golosov, L. S. Ksendzenko, N. A. Opanasiuk (Far Eastern Federal University). The mechanism of reversible deformation phenomena in highly stressed rock samples conditions. FEFU: School of Engineering Bulletin. 2015. No 3(24). P. 116-126. https://www.dvfu.ru/upload/medialibrary/bc9/2015-3-13.pdf (full text). eLibrary ID: 24213533 (full text)
Abstract
For the first time, attention to the reversible character of linear deformations of rocks was drawn, in all probability, by T.R. Seldenrath and J. Gramberg in 1958. While searching for precursors of deformations, the reversible deformations were determined also by I.S. Tomashevskaya and Ya.N. Khamidullin (1972), who advanced the dilatancy hypothesis. In 1986, K. Tazhibaev pointed to residual stresses as the causes of the reversible deformations. However, as M.A. Guzev and V.M. Makarov stated in 2005, none of the hypotheses can explain the occurring abnormalities in a conclusive way. The present article deals with the reversible deformations investigated by a complex acoustic and deformation method, whereas the results are presented from the position of the self-balanced stresses.
Makarov V.V., Ksendzenko L.S., Golosov A.M., Opanasiuk N.A. (Far Eastern Federal University). About the mechanism of a high stressed rock samples reversible deformation phenomena. Горный информационно-аналитический бюллетень (научно-технический журнал). 2015. № S3. С. 3-15. eLibrary ID: 24843466 (full text)
Abstract
Attention to the reversible character of linear deformations of rock samples was presented, apparently, for the first time in (Seldenrath & Gramberg 1958). The authors did not research the mechanisms of the origination of the deformation anomalies, but already in subsequent works such attempts have begun to be undertaken. So the reversible character of the deformations of rocks was contacted with a barrel-shaped straining of samples at uniaxial compression (Tomashevskaya & Khamidullin 1972). In the works of other researchers, residual stresses were proposed in the capacity of reasons for deformation anomalies of various types (Tazhibaev 1986). However, these hypotheses are not supported by critics on closer examination (Guzev & Makarov 2007). In this paper, based on specially developed complex research methods, including on deformation, acoustical and mathematical methods, the authors analyse deformation anomalies of reversible types in samples of rocks at uniaxial compression, define the mechanism of their origin, and develop a mathematical model of the phenomenon.
G. A. Bigus, A. A. Travkin (Bauman Moscow State Technical University, Moscow; Research and Education Center on Welding and Testing, Bauman Moscow State Technical University, Moscow). An evaluation of the flaw-detection characteristics for the detection of fatigue cracks by the acoustic-emission method in samples made of steel 20 that have a cast structure. Russian Journal of Nondestructive Testing. 2015. Vol. 51. No 1. P. 32-38. DOI 10.1134/S1061830915010027. eLibrary ID: 23994180
Abstract
The results of experimental studies on the behavior of fatigue damage in the course of cyclic and static tests using the acoustic-emission method are presented. When performing research works, samples with a stress concentrator that has a steel 20 cast structure were exposed to cyclic loading. The process of the fatigue crack propagation was recorded by two acoustic emission transducers. The composition of the wave packet of the acoustic-emission signal generated by the crack growth was determined and changes in its spectral characteristics were recorded. The samples with fatigue damage were subjected to static tests. The flaw-detection characteristics for the detection of a fatigue crack during static tests were given. A fractographic analysis of the fractures that established the connection with the acoustic-emission data was carried out.
Boreiko D.A., Bykov I.Y., Smirnov A.L. (Ukhta State Technical University, Ukhta; OOO ExpertStroy, Ukhta). The sensitivity of the acoustic-emission method during the detection of flaws in pipes. Russian Journal of Nondestructive Testing. 2015. Т. 51. № 8. С. 476-485. DOI: 10.1134/S1061830915080021. eLibrary ID: 24962336
Abstract
A method for determining the sensitivity of acoustic-emission inspection during the detection of flaws of different sizes is presented. According to the method, the sensitivity is determined as the detection probability of through holes of a certain size during the axial compression of 09Γ2C steel cylindrical pipes. The obtained sensitivity of the acoustic-emission method is compared with the wellknown data on the sensitivity of the ultrasonic, capillary, and radiographic nondestructive-testing methods.
A. S. Voznesensky, Y. O. Kutkin, M. N. Krasilov. Interrelation of the acoustic Q-factor and strength in limestone. Journal of Mining Science. 2015. Vol. 51. No 1. P. 23-30. DOI 10.1134/S1062739115010044. eLibrary ID: 24939561
Abstract
Under analysis is the experimental testing of interrelation between the limit of strength and the acoustic Q-factor in terms of Kasimov deposit limestone. The limit of strength is found using two procedures, namely, direct method and interpolation, which are compared. The authors illustrate the advantage of the acoustic Q-factor procedure in assessment of damage and residual strength of rocks as against the method of elastic wave velocities. The resultant relations can be used in assessment of residual strength and remaining life of pillars and roofs in underground excavations.
Nikolenko P.V., Kormnov A.A., Shkuratnik V.L. Method of study of stressed state of rocks mass. Russian patent № 2557287 (2015). eLibrary ID: 37434837
Abstract
Field: instrumentation. Substance: invention relates to mining and is intended to determine direction of maximum stress in structural elements of the development systems relatively to the drilled test wells. Method includes installation in the vertical well of the rod acoustic line, on which rigidly the contacting with well walls ring is installed, and registration of the acoustic emission (AE) at the acoustic line end projecting from the well. In mass in same horizontal plane with the test well and parallel to it additionally at least three wells are drilled, in each well the acoustic line with ring similar to the located in the first well are installed. All rings are made out of lamellar composite material with anisotropic structure in the ring plane, and orientation angle of the ring layers in each next well is increased by 15° relatively to the previous. As per AE signals registered at each acoustic line the corresponding relationships of total count vs. Time are determined, the acoustic line with total count of AE drop with time is determined. According to the direction of layers in the ring in this acoustic line the direction of maximum stress occurred in the mass in plane of the orthogonal axis of the measuring well is determined. Effect: assurance of the possibility of determination of the maximum stress acting orthogonally to the measuring well.
Novikov E.A., Shkuratnik V.L. Method of determining stress in rock mass. Russian patent № 2557288 (2015). eLibrary ID: 37434838
Abstract
Field: mining operations. Substance: invention relates to mining operations and can be used to determine the stresses in the rock mass. The method in which the samples are recovered from the mass in the direction coinciding with the direction of the maximum main stress present in it. They are exposed to volumetric heating from 20 to 570°C, then they are left for cooling to a temperature of 140-150°C, the activity of acoustic emission is recorded simultaneously. The ratio of the amplitudes enveloping the acoustic emission activity is determined, occurring during cooling and heating, according to which the reaching by the stress at the test sites of the mass of the load level is determined, equal to or greater than 0.9 times the compressive strength of the rock, representing the transition of the latter to the stage of pre-destruction. Effect: determining the fact of exceeding by the value of the maximum main stress of the critical level equal to or greater than 0,9 times the compressive strength σcom that indicates the transition of the rock to the stage of pre-destruction.
Steblev Y.I., Susarev S.V. Bykov D.E. The Principles of Designing Automated Systems for Diagnostic Monitoring of the Engineering Structures of Hazardous Production Objects. Russian Journal of Nondestructive Testing. 2015. Т. 51. № 4. С. 185-197. DOI: 10.1134/S1061830915040063. eLibrary ID: 23985153
Abstract
This article considers the basic principles of designing systems for monitoring engineering structures (SMESs) of hazardous production facilities, which have been formed based on the implementation of engineering designs of the SMESs of a number of large industrial oil-refining facilities. The proposed principles for designing SMESs as complex information diagnostic systems are based on strict logical structuring of huge volumes of information on monitoring objects: design documentation for the object itself and the automated process control system (APCS), safety and metrological provision requirements, and normative and technical documentation. It is shown that the basic stages and principles of SMES design can be formalized and logically described using the instrument of structural schemes.
V. L. Shkuratnik, E. A. Novikov. Influence of the mechanical loading of rock salt on the parameters of thermoacoustic emission. Journal of Applied Mechanics and Technical Physics. 2015. Vol. 56. No 3. P. 486-493. DOI 10.1134/S0021894415030190. eLibrary ID: 24941864
Abstract
This paper presents the results of experimental studies of acoustic emission occurring in rock-salt samples due to their local and volumetric heating under static mechanical loading preceding heating or occurring simultaneously with it. Thermoacoustic emission (TAE) parameters in rock salt depending on its structural heterogeneity were determined. Patterns of change in the TAE activity in test samples of the geomaterial under volumetric heating and subsequent cooling for different values of mechanical preloading were established. The established patterns can be used to predict the fracture of solid rock salt from results of measurement of a TAE in an extracted core.