Abstract:The SCM copper cobalt mine in Congo (Kinshasa) was selected as research background, and the hydrogeological conditions of the drainage project in the original Dima mining area and the high-intensity drainage project in SCM were dynamically monitored using the geophysical prospecting method. The monitoring results indicate that affected by the geological structure, there are two major runoff zones in the mining area, i.e., the main runoff zone in the northeast of pit M and the main runoff zone in the north of pit D. Thus, the theory of tectonic water control in mining area is proposed. The strongest layer of groundwater dynamic field in the main runoff zone is RSC, whose water-bearing medium structure is a karst water-bearing system with the linkage of different levels of karst pores and cavities utilizing a dissolution seam, and an obvious impermeable boundary exists in the bottom. Moreover, Groundwater is dominated by pipe flow and supplemented by seepage. Three aspects, including aquifers with a close connection, groundwater with low infiltration resistance, lower slope and good connectivity, and drainable lower aquifer, play significant roles in reducing the water level of different aquifers effect, indicating that the drainage model of mainly in-pit drainage, supplemented by dewatering wells is effective. The matrix suction in the upper soil slope under the condition of pit drainage is beneficial to the stability of the slope, further verifying the feasibility and superiority of the proposed drainage mode.