Abstract: Based on current conditions of supporting facilities for mine construction used to treat large area of soft foundation in large-scale fields in case of emergency，and taking a certain mine emergency field located in the floodplain region and with a pond distributed in the field as an example，the treatment method of precipitation + dynamic consolidation is chosen from several common foundation treatment methods through technical comparison and economic analysis.Its construction technology is described as follows：lower down the groundwater level to an appropriate elevation through well-point dewatering，and then tamp the foundation soil by means of dynamic consolidation，so as to improve bearing capacity of the foundation and reduce the settlement amount.In order to specify the most suitable method used for foundation treatment for this field，four test sections are designed for trail tamping.Moreover，compressibility and bearing capacity of the foundation in different test section are obtained through static sounding，load plate and other tests.The optimal construction method is selected and applied into construction of the field.Additionally，actually measured information after completion is also used to verify the optimized plan as well as the advancement，reliability，and applicability of technical parameters.

Key words: Emergency flat of mine, Foundation treatment, Dynamic compaction, Plan optimization