It is indicated that the dynamic amplification of abutment rock body and dam-water-foundation interaction should be considered in the aseismatic stability analysis for high arch dam abutment.

The stability of goaf-side roadways depends on not only the abutment distribution, but also the fracturing degree of the coal seam and rock strata alone the pillar width.

Therefore, the deformation mode of compound deformation rock mass on right dam abutment first is analysed before the engineering reaction is studied.