2018_EJRNL_PP_WEI_HE_1.pdf
Terbatas Resti Andriani
» ITB
Terbatas Resti Andriani
» ITB
Under the influence of underground water with high concentration of sulfate, several vertical shafts in the Huang-Huai region are
seriously corroded but have varying degradation degrees in different parts. Taking the auxiliary shaft of Lin-Huan coal mine as the
research subject, the mechanism of this phenomenon was studied. /en, wet-dry alternated and immersion corrosion tests were
carried out, and it was found that only the dry-wet alternated accelerate test is representative of the corrosion mechanism that
cause the corrosion in the shaft. However, it will cost much time and money for the laboratory test to reach the same degradation
depth. To solve this problem, combining with field and laboratory tests, a modified theoretical degradation model was developed
to evaluate the residual life of the corroded sidewall. /e results indicate that the residual life of the shaft sidewall is 25 years, and
the damaged parts have no need for an immediate reinforcement.