Shaft lining design with regard to sinking technology

The study considers the algorithm of problem of rock mechanics in underground construction, connected with determination of stresses in shaft lining in case of using the sinking with lining technology. Software system MIDAS GTS NX enables stage-wise computation with regard to history of shaft construction. First, the initial calculation stage includes all elements of rock mass and eliminates all elements of lining. Vertical strains are set zero in the model. Rigid fixation of faces, gravity load and tectonic stresses are included. This is the model of initial condition of rock mass, i.e. the condition before shaft sinking. Then, modeling simulates stage-wise sinking by shaft bottom cuts of 4.0 m and includes all elements of temporary reinforcement and permanent lining in operation. Rock bolts are included at the second step, shotcrete—at a lag of 2 cuts, and permanent lining—at a lag of 7 cuts from the shaft foot. In total, there are 22 calculation steps ended with model of a sunk and supported interval in the shaft. Validity of the results is checked by comparison of the modeling, analytical and field monitoring data. The model stresses agree well with the analytical and experimental data for advanced shotcrete lining and with analytical data for main reinforced concrete support. The final conclusions should be drawn based on the data of shaft monitoring for 3–5 year after completion of construction.

Silchenko Yu. A., Pleshko M. S. Shaft lining design with regard to sinking technology. MIAB. Mining Inf. Anal. Bull. 2020;(11):96-107. [In Russ]. DOI: 10.25018/0236-14932020-11-0-96-107.

Yu.A. Silchenko¹, Cand. Sci. (Eng.), Deputy Head of Department of Industrial, Nuclear and Radiation Safety Expertise, Federal Autonomous Institution «Glavgosexpertiza of Russia», 119049, Moscow, Russia,
M.S. Pleshko, Dr. Sci. (Eng.), Assistant Professor, Professor, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: mixail-stepan@mail.ru.

M.S. Pleshko, e-mail: mixail-stepan@mail.ru.

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