Horizontal well and surface vertical well combined dewatering method for water-rich surface mine

The invention belongs to the technical field of surface mine slope drainage construction methods, and particularly relates to a horizontal well and surface vertical well combined drainage method for a water-rich surface mine, which comprises the following steps of: 1, carrying out hydrogeological survey on the periphery of the surface mine, determining parameters such as position, depth, well diameter and the like of a surface vertical drainage well, and constructing; secondly, a deep horizontal drainage well is constructed between the drainage well and the mine pit through a horizontal directional drilling machine, and a horizontal water collecting pipeline is formed at the bottom of the water-bearing layer; thirdly, a plurality of seepage water collecting floral tubes are driven into the horizontal water collecting pipeline; fourthly, a water pressure gauge and water pumping equipment are arranged in the horizontal water collecting pipeline; 5, after it is detected that the water pressure rises, water is dr