Abstract: Theoretical study and engineering practice have confirmed that the destruction of a geoengineering project usually starts from some particular positions and gradually spreads out.Two principles of given priority to monitoring and to reinforcing breach have been applied to some geo-engineering projects and proved more valuable.Therefore, how to identify the Potential location of breach for one individual geo-engineering becomes one of the most important steps.In this paper we discuss several major means of ascertaining breach based on breach viewpoint. Finally,we'll further illustrate them while considering their application to the shiplock slope engineering of Wuqiangxi Hydroelectric Power Station.