Analysis on Failure of Main Structures in Ash Field of Power Plant Induced by Mining

The paper studied the destroyed rule of ash dam containing parts of fly ash caused by mining by using FLAC and obtained the critical distortion condition of waterwork structure(discharge pipe,drainpipe,stepped slope,etc) by using ANSYS.The comparison of research conclusion and real destroyed of a power plant showed that the calculation method was feasible and the result was dependable.The research methods and conclusion might provide technical reference for mining under dams and maintaining the structures of ash field.