Abstract: Taking Zhangmatun Iron Mine as the study example，the integrated treatment study was carried out for the thin and soft structural links such as water gushing from cracks and broken strata in the curtain weakness zone of the mining area.Through the analysis of resuls of curtain，geology，water gushing and drilling engineering，the integrated geological analysis was done based on geophysical exploration，subsurface exploration and drilling exploration，and regional hydraulic recharge level，weak section position of curtain，bad structure shape and water-rich spatial distribution were determined.Combined with the construction elements，the precise treatment idea was determined.The integrated treatment technical scheme for the weak zone of grouting curtain was proposed based on the thought of "geophysical exploration first，drilling follow-up".The study results showed that:① the curtain supplementary grouting method had a positive effect on the curtain stability control，and the water blocking effect was very significant；②the comprehensive analysis method based on geophysical exploration and drilling for weak sections of curtain grouting could be used to make accurate and reliable evaluation for the curtain weakness and provide a scientific basis for grouting treatment by means of material selection.After integration treatment of the existing weak curtain area in Zhangmatun Iron Mine，the water blocking effect was remarkable，the compressive strength of broken rock mass was increased，and the water gushing was decreased，therefore，the treatment effect was obvious.The integrated technical scheme proposed in this paper can provide reliable reference for similar engineering practice.

Key words: underground mining, water plugging curtain, curtain grouting, curtain weakness area, geophysical exploration