Based on the ore controlling water level pump room 3 large diameter drilling drainage pipeline damaged outage in Xuecun MIne, the problem caused two levels using only one train a drain road, no spare drain road, the serious threat to the second level drainage ability, combined with provided solutions of Group Science and Technology Tepartment, , borehole imaging and plasma technology to two levels of large diameter 3 damage in drainage hole and repair the breach location were conducted, which got good results.