STUDY OF STEEL ARCH SUPPORT DESIGNS IN THE KRYVBAS IRON-ORE FIELD

Details

Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 123

UDC 622.28.042

Authors:

Khvorost V. V., Ph.D. (Tech.), (State HEI «KNU»)

Brovko D. V., Ph.D. (Tech.), (State HEI «KNU»)

Abstract.

During the studies, changes of the strength characteristics of the steel arch supports were considered in terms of  their long-term operation in aggressive environment in the mine.

Efficiency of the steel used for supporting the roadways is significantly reduced because of the corrosive properties. Aggressive mine and underground water, water-saturated environment, presence of stray currents and intensive ventilation in the tunnels contribute to occurrence of oxidation processes in the steel. The result is a fast, for 7 - 10 years, failure of the steel supports. With the help of the software and computer complex, a three-dimensional model was built for studying steel arch supports in the mines.  The data used in the study were correlated with geological conditions of the Kryvyy-Rig ore field.

The findings have shown that stresses in the arch are directly proportional to the rate of corrosion and operation life of the supports. Basing on the study results, the dependence diagrams were built which have made possible to choose an optimal profile for the supports according to the specified requirements.

Keywords:

roadway support, stress, bearing capacity.

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About the authors:

Khvorost Vasily Valeryevych, Candidate of Technical Sciences (Ph.D.), Associate Professor of building Geotechnology, State Higher Educational Institution "Kryvyi Rih National University" (State HEI «KNU»), Kryvyi Rih, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Brovko Dmitriy Viktorovich, Candidate of Technical Sciences (Ph.D), Associate Professor of building Geotechnology, State Higher Educational Institution "Kryvyi Rih National University" (State HEI «KNU»), Kryvyi Rih, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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