Systems of Support for Junctures of Mine Shafts and Underground Excavations in Salt Rocks
D. N. ALYMENKO1, V. A. SOLOV’EV1,2, V. N. APTUKOV1,3, E. K. KOTLYAR4
1Galurgia, ul. Sibirskaya 94, Perm, 614002 Russia
2Perm National Research Polytechnic University, Komsomol’skii pr. 29, Perm, 614990 Russia
3Perm State National Research University, ul. Bukireva 15, Perm, 614990 Russia
4URALKALI, ul. Pyatiletki 63, Berezniki, 618426 Russia
Keywords: соляные породы, сопряжения шахтных стволов, податливая крепь, математическое моделирование, salt rocks, mine shaft juncture, yielding support, mathematical simulation
Abstract
Alternative systems of support for junctures of mine shafts and underground excavations in salt rock mass include monolithic concrete lining, concrete lining with a yielding layer and supplementary reinforcement. It is shown that traditional non-yielding concrete lining needs periodical basic repair every 5-10 years during operating life. An increase in the thickness of such support is not a guarantee of repair-free operation. It is proved to be expedient to support junctures with mine shafts with reinforcement systems of rock bolts or frames with yielding elements. This conclusion is based on the data of instrumental monitoring of adjacent rock mass and on the results of ANSYS-based simulation of evolution of stress state and damaged rock zones in time.
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