Research Mechanism And Control Measures On Corrosion And Deterioration Of Auxiliary Shaft Lining In Shunhe Coal Mine

Mine shaft is the throat of mine, the stability situation of shaft and shaft lining structure determines the security of the entire shaft. In the process of service, shaft lining structure suffers high salinity water seepage. And the corrosive medium in the water will have corrosion effects on shaft lining. Ignored the corrosion of underground water, it will overestimate the service life of shaft lining.In this paper, aim at corrosion problems of Auxiliary Shaft Lining in Shun He Coal Mine, the corrosion situation were studied by using field investigation, field sampling and laboratory analysis and other methods, the corrosion products were analyzed by using different testing methods, the influence factors of corrosion is discussed. With the corrosion test of pressure Na2SO4 solution for mortar indoor, the corrosion mechanism of shaft lining wa-s further studied. Finally, control measures on corrosion of shaft lining sre put forward.The main achievements and contribution obtained in the thesis are as follows:1. Through the study on material components and contents of loose corrosion substance on shaft lining and concrete core samples by XRF and XRD methods, it is proved the corrosion types of underground water and the general mechanism of corrosion for shaft lining.2. Based on the indoor pressure Na2SO4 solution for mortar corrosion test, the varying pattern of components contents and phase transformation in mortar under different pressure and different solution concentration is obtained, It occurs a further study on the corrosion mechanism of shaft lining.3. Based on the mechanism of corrosion Shun He Coal Mine research, some control measures on underground water corrosion is put forward for Shun He Coal Mine and other new mine which has similar corrosion.