PSI - Issue 32

A.A. Baryakh et al. / Procedia Structural Integrity 32 (2021) 109–116 A.A. Baryakhet al./ Structural Integrity Procedia 00 (2019) 000 – 000

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2. Based on the results of the numerical modelling, an increase in the boundary angle of the subsidence trough at the earth’s surface was established due to the significant mining depth considered and the presence of hard rock strata in the geological section. This enabled the linear dimensions of protective pillars under critical facilities to be reduced, thereby eliminating the loss of potash ore. 3. An estimation of the state of the waterblocking strata for the conditions prevailing in the Gremyachinskoye field showed that, due to the significant depth of mining with the adopted parameters, its stability was ensured with a certain margin of its bearing capacity. With an adequate scientific justification, this should allow the extraction levels of potash ore from the bowels to be increased. Acknowledgements The work was supported by the Russian Foundation for Basic Research (Grant No. 20-45-596001). References Amusin, B.Z. and Linkow, A.M., 1973. Primeneniemetodaperemennyhmodulejdljareshenijazadachlinejnojnasledstvennojpolzuchesti [Application of a method of variable modules for the solution of problems of linear hereditary creep]. Works of the All-Russian Research Institute of Dairy Industry ; Vol. 88, pp. 180 – 184. Andreichuk, V., Eraso, A. and Dominguez, M.C., 2000. A large sinkhole in the Verchnekamsky potash basin in the urals. Mine Water and the Environment . Vol. 19, no. 1, pp. 2 – 18. Baryakh, A.A., Sanfirov, I.A. and Dyagilev, R.A., 2013. Monitoring of negative consequences of potassium mine flooding. Gornyi Zhurnal . no. 6, pp. 34-39. Baryakh, A.A. and Samoldekina, N.A., 2018. Geomechanical estimation of deformation intensity above the flooded potash mine. Journal of Mining Science . Vol. 53, no. 4, pp. 630-642. Baryakh, A.A. and Devyatkov, S.Y., 2018. Geomechanical estimation of conditions for sinkhole formation on earth surface at the site of fresh water breakthrough into salt mine. GornyiZhurnal . no. 6, pp. 17-21 Baryakh, A.A., Dudyrev, I.N., Asanov, V.A. and Pan'kov, I.L., 1992. Interaction of layers in salt massif. Part 1. Mechanical properties of contacts. Fiziko-TexhnicheskiyeProblemyRazrabbotkiPoleznykhIskopaemykh . no 2., pp. 48-52. Baryakh, A.A. and Samoldekina, N.A., 2012. Water-tight stratum rupture under large-scale mining. Part II. Journal of Mining Science . Vol. 48, no. 6, pp. 954-961. Baryakh, A.A., Sanfirov, I.A., Fedoseev, A.K., Babkin, A.I. and Tsayukov, A.A., 2017. Seismic – geomechanical control of water-impervious strata in potassium mines. Journal of Mining Science . Vol. 53, no. 6, pp. 981-992. Baryakh, A.A. and Samoldekina, N.A., 2005. Rheological analysis of geomechanical processes. Journal of Mining Science . Vol. 41, no. 6, pp. 522-530. Fadeev, A.B., 1987. Finite element method in geomechanics. Moscow: Nedra. Gendzwill, D.J. and Stead, D., 1992. Rock mass characterization around Saskatchewan potash mine openings using geophysical techniques: a review. Canadian Geotechnical Journal . Vol. 29, no. 4, pp. 666-674. Goodman, R.E., 1974. The mechanical properties of joints. Advanced Rock Mechanics . Vol. 1, Pt. A, pp. 127-140. Groth, T., 1980. Description and applicability of the BEFEM code. Appl. Rock Mech. Mining. Proc. Conf. Lulea. 1 – 3 June, London, pp. 204 – 208. Kuznetsov, G.N., 1947. Mechanical properties of rock . Moscow: Ugletechizdat. Laptev, B.V., 2009. Emergency situations at Verkhnekamsky potash-magnesium minefield. Bezo-pasnost' truda v promyshlennosti . no. 8, pp. 28 31. [In Russ]. Ong, V., Thom, V., Munroe, S. and Suru, L., 2007. The application of computer mine modeling for wide room deep level potash mining in Saskatchewan. Proceedings of the 1st Canada-US Rock Mechanics Symposium - Rock Mechanics Meeting Society's Challenges and Demands . Vol. 2, pp. 1483-1488. Prugger, F.F. and Prugger, A.F., 1991. Water problems in Saskatchewan potash mining – what can be learned from them? CIM Bulletin . Vol. 84, no. 945, pp. 58 – 66. Whyatt, J. and Varley, F., 2008. Catastrophic Failures of Underground Evaporite Mines. Proceedings of the 27th International Conference on Ground Control in Mining . West Virginia: National Institute for Occupational Safety and Health, pp. 113 – 122. Zienkiewicz, O.C., Taylor, R.L. and Zhu, J.Z., 2013. The finite element method: its basis and fundamentals. 7 th ed. Oxford: Butterworth Heinemann. https://doi.org/10.1016/C2009-0-24909-9