The phases of corrosion products on underground steel tube and their changes with depth of rust layer were analysed using Mossbauer effect, X - ray diffraction and proton X -ray fluorescence analysis.
The electrical interference in the underground mine area gives rise to serious corrosion of pipelines and the improved ground discharge is satisfactorily effective.
矿区井下电铁干扰使管道受到强烈腐蚀，采用改良型接地排流后收到了满意的效果。
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This paper describes the corrosion surroundings of Chinese underground collieries and the present protection state of coal mining equipment.