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PHYSICS OF ROCKS AND PROCESSES
ArticleName Determination of static and dynamic stresses in physical models of layered and block rock masses
DOI 10.17580/gzh.2019.07.02
ArticleAuthor Zuev B. Yu., Zubov V. P., Smychnik A. D.
ArticleAuthorData

Saint-Petersburg Mining University, Saint-Petersburg, Russia:

B. Yu. Zuev, Head of laboratory, Candidate of Engineering Sciences
V. P. Zubov, Head of laboratory, Professor, Doctor of Engineering Sciences, spggi_zubov@mail.ru

 

K-Potash Service, Kaliningrad, Russia:
A. D. Smychnik, Doctor of Engineering Sciences

Abstract

The known methods and technical means for the study of stresses in models made of equivalent materials (EM) are characterized by large errors when used in small, medium-block and thin-layer models of rock masses. One of the main causes of errors is the discrepancy between the dimensions of sensors arranged in the model and their dynamic ranges while the real possible scale of modeling are 1:20–1:500. In connection with the intensification of underground mining of solid minerals and due to transition of mining operations to the deeper horizons, which is accompanied by qualitative changes in geomechanical behavior of undermined rock strata, it is exceptionally important to obtain reliable information about the distribution and values of static and dynamic stresses in layered and block rock masses. This article substantiates the requirements for the design of sensors and their arrangement in rock mass models made of equivalent materials. The implementation of these requirements allows solving the specified relevant problem in technically feasible scale modeling. An example of sensor design and sensor layout in the model is given.

keywords Modeling methods, devices, stresses, sensors, models of equivalent materials, layered and block rock masses, static and dynamic modes
References

1. Zubov V. P., Smychnik A. D. The concept of reducing the risks of potash mines flooding caused by groundwater inrush into excavations. Zapiski Gornogo instituta. 2015. Vol. 215. pp. 29–37.
2. Zubov V. P. Applied technologies and current problems of resource-saving in underground mining of stratified deposits. Gornyi Zhurnal. 2018. No. 6. pp. 77–83. DOI: 10.17580/gzh.2018.06.16
3. Ji H., Zhang J. C., Xu W. Y., Wang R. B., Wang H. L. et al. Experimental Investigation of the Anisotropic Mechanical Properties of a Columnar Jointed Rock Mass: Observations from Laboratory-Based Physical Modelling. Rock Mechanics and Rock Engineering. 2017. Vol. 50, Iss. 7. pp. 1919–1931.
4. Hongpu Kang, Jianzhong Li, Jinghe Yang, Fuqiang Gao. Investigation on the Influence of Abutment Pressure on the Stability of Rock Bolt Reinforced Roof Strata Through Physical and Numerical Modeling. Rock Mechanics and Rock Engineering. 2017. Vol. 50, Iss. 2. pp. 387–401.
5. Kuranov A. D., Zuev B. Yu., Istomin R. S. The forecast deformations of the ground surface during mining under protected objects. Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects : Proceedings of the XIth Russian–German Raw Materials Conference. Leiden : CRC Press/Balkema, 2019. pp. 39–50.
6. Suchowerska Iwanec A. M., Carter J. P., Hambleton J. P. Geomechanics of subsidence above single and multi-seam coal mining. Journal of Rock Mechanics and Geotechnical Engineering. 2016. Vol. 8, Iss. 3. pp. 304–313.
7. Kan Wu, Gong-Lin Cheng, Da-Wei Zhou. Experimental research on dynamic movement in strata overlying coal mines using similar material modeling. Arabian Journal of Geosciences. 2015. Vol. 8, Iss. 9. pp. 6521–6534.
8. Shabarov A. N., Zuev B. Yu., Krotov N. V. Prospects of the physical model-based study of geomechanical processes. Geomechanics and Geodynamics of Rock Masses : Proceedings of the 2018 European Rock Mechanics Symposium. London : Taylor & Francis Group, 2018. Vol. 1. pp. 423–430.
9. Glushikhin F. P., Kuznetsov G. N., Shklyarskiy M. F., Pavlov V. N., Zolotnikov M. S. Modeling in geomechanics. Moscow : Nedra, 1991. 240 p.
10. Application guide for direct pressure measurement in granular medium and soil. Moscow, 1965. 93 p.
11. Zuev B. Yu., Tsirel S. V., Melnitskaya M. E., Istomin R. S. Physical modeling of geomechanical processes during collapse of the roof. Marksheyderskiy vestnik. 2017. No. 3(118). pp. 56–60.
12. Sammmal O. Yu. Stresses in Concrete and Technological Lifespan Prediction for Concrete and Reinforced Concrete Structures. Tallinn : Valgus, 1980 203 p.
13. Promet P. Kh., Eesorg Kh. Kh. Stress concentration around a foreign body in a uniform medium. Experimental Research of Engineering Structures : Collected Papers. Moscow : Nauka, 1973. pp. 7–10.
14. Rykov G. V., Skobeev A. M. Stres measurement in Soil under Short-Term Loads. Moscow : Nauka, 1978. 165 p.
15. Fomitsa L. N. Semiconductor Converters for Mechanical Stress Measurements. Minsk : Vysh. Shkola, 1983. 123 p.
16. Jacobi O. Praxis der Gebirgsbeherrschung. Essen : Verlag Glückauf, 1976. 566 s.
17. Triandafilidis G. E. Soil-Stress Gage Design and Evaluation. Journal of Testing and Evaluation. 1974. Vol. 2, Iss. 3. pp. 146–158.
18. Demin V. F., Namova N. A., Demina T. V., Karataev A. D. Deformation of enclosing rocks around underground excavations depending on influencing factors. Naukovii Visnik Natsionalnogo girnichogo universitetu. 2015. No. 4. pp. 35–38.
19. Demin V. F., Yavorskiy V. V., Demina T. V. Study of the nature of deformation of wall rocks around the mine workings with the anchor depending on the angle of dip and depth be strained contour array. Mezhdunarodnyi zhurnal prikladnykh i fundamentalnykh issledovanii. 2015. No. 7-2. pp. 205–212.

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