Triaxial compression test procedure and data obtained on physical models of frame and honeycomb mine structures

The stress–strain behavior and the secondary stress field formation in surrounding rock mass around underground excavations is connected with the genesis, strength and elastic characteristics of rocks, with the sequence of ore and barren rock extraction and with the change in values of the effective stresses. This article describes the experimental studies into deformation processes in models of frame and honeycomb mine structures using a new adapted procedure of the stress–strain analysis in triaxial compression. Silicate cubic models 200 mm in size were subjected to triaxial compression on the designed testing machine at varied values of principal stresses scale-wise adjusted to the real in-situ conditions. Acoustic emission sensors were set on the surfaces of the rock specimens and inside the model excavations to record acoustic signals in the course of deformation of the models. The testing data obtained in physical modeling of gradual loading and immediate relief of the model structures to simulate the changing stress–strain behavior made it possible to identify the domains of damage and deformation in real time.

Vysotin N. G., Ch.V. Khazhyylai, Kosyreva M. A., Shermatova S. S. Triaxial compression test procedure and data obtained on physical models of frame and honeycomb mine structures. MIAB. Mining Inf. Anal. Bull. 2021;(11):19-27. [In Russ]. DOI: 10.25018/0236_ 1493_2021_11_0_19.

The study was supported by the Russian Science Foundation, Project No. 19-17-00034.

N.G. Vysotin¹, Senior Lecturer, e-mail: kalgani@yandex.ru,
Ch.V. Khazhyylai¹, Graduate Student, e-mail: chod.872198@mail.ru,
M.A. Kosyreva¹, Graduate Student, e-mail: marinkosyreva@gmail.com,
S.S. Shermatova¹, Graduate Student, e-mail: s_shermatova@inbox.ru,
¹ Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

N.G. Vysotin, e-mail: kalgani@yandex.ru.

1. Sidorov D., Ponomarenko T. Reduction of the ore losses emerging within the deep mining of bauxite deposits at the mines of OJSC «Sevuralboksitruda». IOP Conference Series: Earth and Environmental Science. 2019, vol. 302, article 012051. DOI: 10.1088/1755-1315/302/1/012051.

2. Eremenko A. A., Konurin A. I., Shtirts V. A., Prib V. V. Identification of higher rock pressure zones in rockburst-hazardous iron ore deposits. Gornyi Zhurnal. 2020, no. 1, pp. 78—81. [In Russ].

3. Rybin V. V., Konstantinov K. N., Kagan M. M., Panasenko I. G. Methodology of integrated stability monitoring in mines. Gornyi Zhurnal. 2020, no. 1, pp. 53—57. [In Russ].

4. Eremenko V.A., Aksenov Z. V., Pul E. K., Zakharov N. E. MAP 3D analysis of secondary stress field structure in face area of development headings in rockburst-hazardous seams. MIAB. Mining Inf. Anal. Bull. 2020, no. 5, pp. 91—104. [In Russ]. DOI: 10.25018/0236-1493-2020-50-91-104.

5. Tiwari R. P., Rao K. S. Physical modeling of a rock mass under true triaxial stress state. International Journal of Rock Mechanics and Mining Sciences. 2004, vol. 41, pp. 396—401.

6. Glushikhin F. P., Kuznetsov G. N., Shklyarskiy M. F. Modelirovanie v geomekhanike [Modeling in geomechanics], Moscow, Nedra, 1991, 240 p.

7. Arora K., Gutierrez M., Hedayat A. New physical model to study tunnels in squeezing clayrich rock. Geotechnical Testing Journal. 2021, vol. 44, no. 6, article 20200081

8. Arora K., Gutierrez M., Hedayat A. Physical modeling of lined tunnel in squeezing ground conditions. Geo-Congress 2020: Engineering, Monitoring and Management of Geotechnical Infrastructure. Minneapolis, 2020, pp. 335—344.

9. Trubetskoy K. N., Myaskov A. V., Galchenko Yu.P., Eremenko V. A. Creation and justification of convergent technologies for underground mining of thick solid mineral deposits. Gornyi Zhurnal. 2019, no. 5, pp. 6—13. [In Russ].

10. Galchenko Yu. P., Eremenko V. A., Kosyreva M. A., Vysotin N. G. Features of secondary stress field formation under anthropogenic change in subsoil during underground mineral mining. Eurasian Mining. 2020, no. 1, pp. 9—13. DOI: 10.17580/em.2020.01.02.

11. Eremenko V. A., Galchenko Yu.P., Kosyreva M. A. Effect of mining geometry on natural stress field in underground ore mining with conventional and nature-like technologies. Fiziko-tekhnicheskiye problemy razrabotki poleznykh iskopayemykh. 2020, no. 3, pp. 98—109. [In Russ].

12. Jiang Q., Feng X., Song L., Gong Y., Zheg H., Cui J. Modeling rockspecimens through 3D printing: Tentative experiments and prospects. Acta Mechanica Sinica. 2015, vol. 32, no. 1, pp. 524—535.

13. Kong L., Ostadhassan M., Li C., and Tamimi N. Rock physics and geomechanics of 3D printed rocks. ARMA 51st U.S. Rock Mechanics, Geomechanics Symposium. San Francisco, California, USA, 2017.

14. Gell E. M., Walley S. M., Braithwaite C. H. Review of the validity of the use of artificial specimens for characterizing the mechanical properties of rocks. Rock Mechanics and Rock Engineering. 2019, vol. 52, no. 9.

15. Eremenko V. A., Galchenko Yu.P., Vysotin N. G., Leyzer V. I. Kosyreva M. A. Strength, deformation and acoustic characteristics of physical models of frame and honeycomb underground structures. Fiziko-tekhnicheskiye problemy razrabotki poleznykh iskopayemykh. 2020, no. 6, pp. 93—104. [In Russ].

16. Galchenko Yu. P., Leizer V. I., Vysotin N. G., Yakusheva E. D. Procedure justification for laboratory research of secondary stress field in creation and application of convergent technology for underground mining of rock salt. MIAB. Mining Inf. Anal. Bull. 2019, no. 11, pp. 35—47. [In Russ]. DOI: 10.25018/0236-1493-2019-11-0-35-47.