Abstract:

The Grey model is used widely to predict the ground subsidence. In this study, the model was applied to predict the subsidence of the surface of the Chinh Bac waste dump in the Nui Beo open-pit mine. The parameters of the model were determined using the data acquired from the first four cycles of seven marks’ observation. The model was employed to predict subsidence in the next cycles. The assessment of the model based on P and C standards with P = 1 and C = 0.001. A comparison of the results from the model and reference data showed that the maximum error was just under 10% of subsidence. These results satisfied the requirement of predicting mining subsidence. Therefore, the Grey model can be used effectively to predict the subsidence of the waste dump of open pit mines in Quang Ninh.