Geomechanical aspects of formation of natural stresses in a concrete mount of a shaft shaft

Authors: Sentyabov S.V.

In the presented studies, the laws of the formation of natural stresses in the rock mass are confirmed, which are the sum of gravitational, static tectonic and variable components that have a variable value as a result of uniform periodic volume expansion and contraction of the Earth. The problem of trunk stability is due to the need to solve problems to determine the level of stress-strain state and strength properties in concrete supports. The stress parameters in the lining of the shafts and the monitoring of their changes are determined using a new method for measuring unloading strains. When comparing the stresses obtained experimentally by analytical methods in the concrete support of mine shafts from 2013 to 2019 at experimental test sites in the support having the lengths of bases of 1600 and 70 mm, provided that the number of geoblock ranks at this base is two, a connection with the results of measurements in an array of rocks based on 50 m with an average size of structural blocks of 0.5 m and an investment coefficient of  = 5, which corresponds to three ranks of geoblocks. In practice, it is proposed to use the main identified provisions, namely: the stress state of the mine shaft lining, which is formed as a function of their structural parameters, the full tensor of gravitational tectonic stresses acting in the rock mass at the time of the start of research and time variables, which are determined by natural and analytical methods.

Keywords: concrete support of trunks; stress-strain state; dislocation; stability; slot unloading; unloading deformations; physical and mechanical properties.
For citation:

Sentyabov S.V. Geomechanical aspects of formation of natural stresses in a concrete mount of a shaft shaft. MIAB. Mining Inf. Anal. Bull. 2020;(3-1):199-207. [In Russ]. DOI: 10.25018/0236-1493-2020-31-0-199-207.

Acknowledgements:

Research was carried out according to the state task № 075-00581-19-00 on the topic № 0405-2019-0007.

Issue number: 3
Year: 2020
Page number:
ISBN:
UDK:
DOI:
Article receipt date: 21.11.2019
Date of review receipt: 21.02.2020
Date of the editorial board′s decision on the article′s publishing: 20.03.2020
About authors:

Sentyabov S.V., Cand. Sci. (Eng.), Senior Researcher, The Institute of Mining of the Ural branch of the Russian Academy of Sciences, 620075, Ekaterinburg, Russia.

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Bibliography:

1. Myaskov A.V. Methodological framework for ecological-and-economic substantiation of natural ecosystem preservation in mining regions. MIAB. Mining Inf. Anal. Bull. 2011, no 1, pp. 399–401. [In Russ].

2. Myaskov A.V. Current ecological-and-economic problems in the subsoil use. MIAB. Mining Inf. Anal. Bull. 2014, no 2, pp. 157–160. [In Russ].

3. Timonin V.V., Kondratenko A.S. Process and measuring equipment transport in uncased boreholes. Journal of Mining Science. 2015. Vol. 51. no 5, pp. 1056–1061.

4. Sidorov D.V., Potapchuk M.I., Sidlyar A.V. Rockburst hazard prediction in tectonically damaged ore body at deep levels of the Nikolaevka complex deposit. Zapiski Gornogo instituta. 2018. Vol. 234, pp. 604–611. [In Russ].

5. Eremenko V.A., Gakhova L.N., Semenyakin E.N. Formation of concentration zones of stresses and dynamic events in deep-level mining at the Tashtagol deposit. Fiziko-tekhnicheskiye problemy razrabotki poleznykh iskopayemykh. 2012, no 2, pp. 80–87. [In Russ].

6. Vloch N.P., Zubkov A.V., Feklistov Y.G. Sovershenstvovanie metoda shchelevoj razgruzki [Improvement of the method of slotted unloading. Diagnostics of the stress state of rock massifs]. Novosibirsk: IGD SB AS USSR, 1980. pp. 30–35. [In Russ]

7. Vloch N.P. Metod chastichnoj razgruzki na bol’shoj baze. Diagnostika napryazhennogo sostoyaniya porodnyh massivov [Partial unloading method on a large base. Diagnostics of the stress state of rock massifs]. Novosibirsk: IGD SB AS USSR, 1980. pp. 37–42. [In Russ]

8. Zubkov A.V., Zubkov Y.M. Modul’ deformacii massiva gornyh porod — funkciya rangov slagayushchih ee blokov [The deformation modulus of a rock mass — a function of the ranks of its constituent blocks]. Geomechanics and stress state of the earth’s interior: Mater. Int. conf. (Novosibirsk, October 4–7, 1999). Novosibirsk, 1999. pp. 65–70. [In Russ]

9. Sentyabov S.V. Accounting for hierarchical blockiness of the array in solving geomechanical problems. MIAB. Mining Inf. Anal. Bull. 2017. no 10. Pp. 161—166. [In Russ]

10. Betony. Metody opredeleniya prochnosti na szhatie i rastyazhenie [Concrete. Methods for determining the compressive and tensile strength]. GOST 10180—76. Moscow: Goskomstroyizdat, 1982. 23 p. [In Russ]

11. Sentyabov S. V. Research and forecast of changes in the stress-strain state of the support of mine shafts at the Gaisky min. MIAB. Mining Inf. Anal. Bull. 2018. no 10. pp. 79—85. [In Russ]

12. Smirnov O.Y. Mining of ore deposits in conditions of increased tension. Izvestiya vuzov. Gornyj zhurnal 2017. no 7. pp. 29–35. [In Russ]

13. Zubkov A.V. Patterns of formation of the stress state of a rock mass in the upper part of the earth’s crust. Litosfera. 2015. no 6. pp. 116–129. [In Russ]

14. Ozornin I.L., Bolikov V.E. Monitoring of deformation processes in the conditions of secondary structuring of the nearedge array of underground structures. Problemy nedropol’zovaniya. 2017. no 4. pp. 81–88. [In Russ]

15. Zubkov A.V., Celine K.V., Sentyabov S.V. Patterns of formation of the stress state of a rock mass in the upper crust. Litosfera. 2015. no 6. pp. 116—129. [In Russ]

16. Zubkov A.V. The law of the formation of the natural stress state of the earth’s crust / A.V. Zubkov. Reports of the Academy of Sciences. 2018. T. 483. no 3. pp. 1—11. [In Russ]

17. Yang Z.S., Peng F.-L., Qiao Y.-K., Hu Y.-Y. A new cryogenic sealing process for the launch and reception of a tunnel shield. Tunnelling and Underground Space Technology. 2019, 85, pp. 406—417.

18. Hu X., Fang T., Chen J., Ren H., Guo W. A large-scale physical model test on frozen status in freeze-sealing pipe roof method for tunnel construction. Tunnelling and Underground Space Technology. 2018, 72, pp. 55—63.

19. Rib S.V. The influence of rock interlayer location on the stress-strain state of the rock massif near the underground mine. IOP Conference Series: Earth and Environmental Science. 2018. Vol. 206. Pp. 1—4 (012011) (accessed: http://library.sibsiu.ru).

20. 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, no 3, pp. 1–13.

21. Hong K., Han E., Kang K. Determination of geological strength index of jointed rock mass based on image processing. Journal of Rock Mechanics and Geotechnical Engineering. 2017. no 9. Pp. 702–708.

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