Palamarchuk T.A. Theoretical aspects of monitoring synergistic processes in the rock massif

Details

Parent Category: Geo-Technical Mechanics, 2019

Category: Geo-Technical Mechanics, 2019, Issue 146

Geoteh. meh. 2019, 146, 151-158

https://doi.org/10.1051/e3sconf/201910900067

Theoretical aspects of monitoring synergistic processes in the rock massif

¹Palamarchuk T.A.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC 550.8.07/.08:681.518.54:622.02      

Language: English

Abstract.

In this article, the grounds for considering of rocks massif as a nonlinear medium with dissipative properties have been shown that as a result of the combined influence of normal and tangential stresses around the workings, synergistic effects are observed with the formation of similar structures, which leads to the appearance of a quasi-stationary damped stress wave, and this, in turn, makes it possible to predict the nature of changes in the stress-strain state of the rock massif in space-time continuum. A mechanism is proposed to explain the known wave nature of changes in rock pressure around disturbances in the rock massif and self-organization processes that occur in it, leading to a steady state as a result of self-destruction of macroscopic nonlinear dissipative systems, which include geomechanical systems. This mechanism is that as a result of exposure geological and technogenic factors the massif goes from one quasi-stationary equilibrium state with the minimum potential energy to another. If the increase in entropy characterizes the growth of chaos in the system, then the self-organization of the system is characterized a decrease in chaos are shown. Those, entropy are one of the most important parameters characterizing the processes of the system self-organization. The parameters characterizing the degree of the system self-organization can also include: the fragility of rocks, coefficient of loosening, coefficient of structural weakening. Taking into account the influence of the mining operations speed, a theoretical justification for diagnostics the physicomechanical properties and the stress state of sedimentary rocks have been developed by using the dynamic and kinematic characteristics of acoustic and electric fields. The theoretically established relationship of the stress state of massif of quartz-containing rocks with its elastic and electrical parameters follows taking into account the damped wave nature of the processes around the mine workings. Obtained results indicate the principal possibility of quantitative assessment of stress components acting in the rock massif using determined physical parameters of the massif.

Keywords: rocks massif, synergistic processes, geophysical monitoring, stress-strain state.

 

References

1. Pashkin, Ye. M. (1992), “Synergetics of geosystems: a new approach in engineering geology”, Ingenernaya geologiya, no. 6,  pp. 11–13

2. Palamarchuk, T. A., Kirichenko, V. Ya. and Usachenko, B. M. (2006), Elementy mekhanosinergetiki porodnogo massiva. [Mechanoenergetics  pedigree array cells], Lira LTD, Dnipropetrovsk, UA.

3. Zakharova, L. M., (2016). Fizychni osnovy evoliutsii dysypatyvnykh struktur v geomekhanitsi [Physical bases of evolution of dissipative structures in geomechanics], Lambert Academic Publishing, Saarbruken, GE.

4. C. S. Villy and A. Kontogianni (2009), “Coulomb stress changes: From earthquakes to underground excavation failures Stathis”, International Journal of Rock Mechanics and Mining Sciences, no. 46(1), pp. 182-187.

5. D. I. Sahar, M. Schoenball, E. Gerolymaton and T. Kohl (2017), “Analysis of borehole breakout development using continuum damage mechanics Show more”, International Journal of Rock Mechanics and Mining Sciences, no. 97, pp. 134-143.

6. D. Wallis, G. E. Lloyd, R. J. Phillips, A. J. Parsons and R. D. Walshaw (2015), “Low effective fault strength due to frictional-viscous flow in phyllonites, Karakoram Fault Zone”,. NW India.Journal of Structural Geology, no. 77, pp. 45-61.

7. Shashenko, A. N., (2001),. Mekhanika gornykh porod [Mechanics of mine rocks], NGAU, Dnipropetrovsk, UA.

About the author

Palamarchuk Tetiana Andriivna, Doctor of Technical Sciences (D.Sc), Senior Researcher, Principal Researcher in the Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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