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Название Geomechanical and technological aspects of shaft design improvement in salt rocks
DOI 10.17580/gzh.2015.11.05
Автор Soloviev V. A., Aptukov V. N., Kotlyar E. K.
Информация об авторе

Galurgia JSC, Perm, Russia:
V. A. Soloviev, Principal Researcher, Professor, Doctor of Engineering Sciences, e-mail: Solovyev@gallurgy.ru
V. N. Aptukov, Principal Researcher, Professor, Doctor of Engineering Sciences


Uralkali, Bereznyaki, Russia:
E. K. Kotlyar, Principal Engineer


It is a standard method to reinforce mine shafts in salt rocks using concrete lining or tubing support. From the experience of operating mine shafts, loads on the support grow with time under influence of rock pressure and rheological properties of salt rocks, and the support collapses. Rock pressure in salt rocks grows with the increase in mining depth, enlargement of mine shafts and exposure areas in rocks as well as at junctures of mine shafts and dosing chambers and inlet drivages. Miners know that one of the principles of stable mine support is that the support gives under rock pressure and deforms under critical load with no loss of the load-carrying capacity. This principle is particularly vital for mine workings driven in salt rocks that possess creep. The mentioned method is successfully used in tunneling. A pliable layer is made of cribbing, friction props or tubular members placed between rocks and rigid frame support. The authors suggest making pliable layer of compressible (nondestructive) material—foamed polystyrene—produced in the form of plates and widely used in civil underground construction. The article describes research findings on interaction between concrete lining, pliable layer and salt rock mass, the calculation method and flowchart for two-layer support with a pliable layer in mine shaft construction. The put forward method of mine shaft construction allows eliminating expensive cast iron liner. The method is now in operation at Upper Kama Potash Deposit, in projects of construction of mine shafts in Ust-Yaivinsky and Polovodovsky Mines, shaft no. 4 in Solikamsk Mine-3 and in construction of junctures of mine shafts and drivages at Usolsky Potash Mining-and-Processing Plant.

Ключевые слова Salt rocks, mine shafts, pressure on support, stress in support, two-layer support, pliable layer, foamed polystyrene
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Language of full-text русский
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