Abstract: The hylaea area of South America has a drippy climate and complicated geological condition. It is necessary to guarantee the stability of the waste dump and satisfy requirements of local strict environment protection during construction process of open pit metal mine. Thus， the waste dump construction has been the most significant during the construction of whole open pit mine. Taking the construction and usage of Stage1 waste dump in Mirador Copper Mine in Ecuador as a case， the construction measures and methods for waste dump of the open pit metal mine were elaborated from aspects of dewatering， damming， dumping ways， layered rolling， maintenance of waste dump under conditions of more raining and less rock. These construction measures and methods have been applied and generalized extensively during construction process of this mine， and also offer certain guidance to similar type of mines.

Key words: Waste dump, Dumping by layers, Stability, Dumping ways