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ArticleName Innovative approaches to rock mass stability in mining high-grade quartz veins
DOI 10.17580/em.2016.02.01
ArticleAuthor Sashurin A. D., Panzhin A. A., Kharisov T. F., Knyazev D. Yu.

Institute of Mining, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia:

Sashurin A. D., Head of Geomechanics Department,
Panzhin A. A., Academic Secretary, Candidate of Engineering Sciences,
Kharisov T. F., Junior Researcher, Underground Mine Geomechanics Laboratory,
Knyazev D. Yu., Junior Researcher, Underground Mine Geomechanics Laboratory,


In mining high-grade quartz veins, it is strictly required to produce pure quartz concentrate and to reduce loss and dilution of the useful mineral component. Compliance with the requirements, in accordance with the specifics of quartz production, is in many ways dependent on stability of mine openings. It is known that mine support pressure mainly grows due to displacement of wall rocks toward the axis of a mine opening (convergence) in the course of the working face advance. The results of numerous studies into the mechanism of this process in an elastic rock mass allow optimizing stability of mine openings. On the other hand, the mentioned process in a post-limiting stress state rock mass yet remains to be studied. This article describes findings of investigation of support pressure in the working face area in the post-limiting state rock mass. The investigations involved in situ measurements of rock deformation in the face areas with the spacings conformable with the cross-section dimension of an opening in terms of drivage a mine shaft using a combination technology in a hard rock mass in the post-limiting stress state. Based on the accomplished measurements and using FSP-1 Trends program to construct nonlinear regression equations and function–factor trends, the mathematical model describes the change in the absolute deformation of wall rocks in the course of the working face advance. The mathematical model produces an exponential dependence of the convergence factor α* and the ratio between the distance to the face, L, and the radius of the mine opening, R. The values of the factor α* determined in the postlimiting stress rock mass differ significantly from the same factor values obtained earlier for the elastically deforming rocks. The comparative analysis of the changes in α* in the host rock mass of Kyshtym quartz deposit subject to elastic deformation and in the rock mass in the post-limiting stress state shows significant difference between the two processes, which is to be accounted for when selecting support design and installation procedure.

Work is executed at financial support of the Ministry of education and science of the Russian Federation (project RFMEF160714X0026)

keywords Deformation, country rock mass, ultimate strength, post-limiting state, drivage of mine openings, work face advance, convergence, displacement, dependence

1. Bolikov V. E., Kharisov T. F., Ozornin I. L. Napryazhenno-deformirovannoe sostoyanie betonnoy krepi pri stroitelstve vertikalnykh stvolov (Stress-strain state of concrete support during the construction of vertical shafts). Gornyy informatsionno-analiticheskiy byulleten = Mining Informational and Analytical Bulletin. 2011. No. S11. pp. 77–86.
2. Atsushi Sainoki, Hani S. Mitri. Dynamic behavior of mining-induced fault slip. International Journal of Rock Mechanics & Mining Sciences. 2014. Vol. 66. pp. 19–29.
3. W. Ashley Griffith, James Becker, Krysta Cione, Tim Miller, Ernian Pan. 3D topographic stress perturbations and implications for ground control in underground coal mines. International Journal of Rock Mechanics & Mining Sciences. 2014. Vol. 70. pp. 59–68.
4. Ruud Weijermars. Mapping stress trajectories and width of the stress-perturbation zone near a cylindrical wellbore. International Journal of Rock Mechanics & Mining Sciences. 2013. Vol. 64. pp. 148–159.
5. Bolikov V. E., Balek A. E. Issledovaniya povedeniya neustoychivykh napryazhennykh gornykh massivov pri stroitelstve shakhtnykh stvolov (Investigations of behaviour of unstable strain rock massifs during the shaft construction). Gornyy vestnik = Mining bulletin. 1995. No. 4. pp. 45–48.
6. Sashurin A. D. Formirovanie napryazhenno-deformirovannogo
sostoyaniya ierarkhicheski blochnogo massiva gornykh porod  Forming stressed-deformed state of hierarchically unitized rock mass). Problemy nedropolzovaniya = Soil use problems. 2015. No. 1 (4). pp. 38–44.
7. Bulychev N. S. Mekhanika podzemnykh sooruzheniy (Mechanics of underground facilities). Moscow : Nedra, 1994. 382 p.
8. Pleshko M. S., Maslennikov S. A. O probleme issledovaniya raboty krepi vertikalnykh stvolov v prizaboynoy zone (About the problem of investigation of the effect of vertical shaft support in the critical area of formation). Gornyy informatsionnoanaliticheskiy byulleten = Mining Informational and Analytical Bulletin. 2009. No. 9. pp. 303–305.
9. Zubkov A. V., Afonin I. V., Vlokh N. P. et al. Razrabotka metodov i apparatury dlya otsenki napryazhennogo sostoyaniya porod v netronutom massive (Development of methods and units for the assessment of stress state of rocks in tight rock). Sverdlovsk : Institute of Mining, 1979.
10. Bolikov V. E., Balek A. E., Til V. V., Zaytsev Yu. G. Geomekhanicheskie problemy pri prokhodke i kreplenii kapitalnykh gornykh vyrabotok na shakhte «Tsentralnaya» (Geomechanical problems during the driving and support of permanent workings on “Tsentralnaya” mine). Gornyi Zhurnal = Mining Journal. 1998. No. 6. pp. 15–17.
11. Sashurin A. D., Balek A. E., Dalatkazin T. Sh., Melnik V. V., Zamyatin A. L., Konovalova Yu. P., Usanov S. V. Destruktsiya zemnoy kory i protsessy samoorganizatsii v oblastyakh silnogo tekhnogennogo vozdeystviya (Destruction of Earth’s crust and processes of self-organization in the areas of strong technogenic impact). Novosibirsk, 2012. pp. 119–178.
12. Isik Yilmaz, Ozge Yucel. Use of the core strangle test for determining strength anisotropy of rocks. International Journal of Rock Mechanics & Mining Sciences. 2013. Vol. 66. pp. 57–63.
13. Kharisov T. F., Ozornin I. L. Formirovanie napryazheniy v krepi pri stroitelstve vertikalnykh stvolov v tektonicheski napryazhennom gornom massive (Formation of stress in attachment in construction of vertical shaft in the tectonic stress of mountain range). Izvestiya vysshikh uchebnykh zavedeniy. Gornyy zhurnal = News of the Higher Institutions. Mining Journal. 2013. No. 6. pp. 60–67.
14. Antonov V. A., Yakovlev M. V. O programme dlya EVM «Trendy FSP-1» i ee primenenii v informatsionnykh sistemakh gornykh predpriyatiy (About the computer program “Trends FSP-1” and its application in information systems of mining enterprises). Informatsionnye tekhnologii v gornom dele : sbornik dokladov Vserossiyskoy nauchnoy konferentsii s mezhdunarodnym uchastiem (Information technologies in mining : collection of reports of All-Russian scientific conference with international participation). Ekaterinburg, 2012. pp. 26–34.

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