Exploration technology of deep buried small-scale fissure type leakage
Small-scale fissure type leakage is frequently seen for a reservoir reinforcement project with earth-rock dam.These types of small-scale fissures often buried deeply,and mostly developed at dam bottom or the intersec-tion position between dam bottom and dam abutment.Wiring at abutment is prone to be limited,and there exists abutment leakage sometimes.A single geophysical exploration method often fails to meet these detection conditions.During the leakage exploration for a reservoir in Shangsi County of Guangxi,three detection methods were compre-hensively applied including high-density electric method,natural electric field method and K-profile method.The results demonstrate the three methods complement each other,constitute a detection system able to effectively iden-tify the deep buried small-scale leakage in earth-rock dam,and provide important technical support for eliminating the dam unsafe factors in the reinforcement process of earth-rock dam reservoir.
fissure type leakageK-profile methoddam abutment leakage
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