The invention discloses a prevention and treatment method for goaf water under condition of repeated mining of thick seam upper slices destructed by minitype
coal mines. The method comprises the following steps: step 1, determining a target area of
directional drilling; step 2, constructing a drilling field; step 3, detecting the goaf water-rich anomaly area of the roadway heading face by a transient electromagnetic method and a high-density
direct current method; step 4, arranging conventional drilling holes in the roadway heading face for drilling
verification, allowing roadway tunneling incase of no anomaly in drilling
verification, and treating the goaf water by circulation of water exploitation-tunneling-water exploitation; step 5, performing treatment in case of gushing water in drilling in the process of drilling
verification in step 4; step 6, performing treatment if the
drainage volume of the conventional drilling holes of the heading face in step 5 tends to be stable for a long time. The goaf water is prevented and treated by combination of ground and downhole
geophysical prospection-conventional drilling-
directional drilling; advanced, efficient, safe, accurate, large drop and long-distance
cut-off and diversion of the goaf water is achieved; and disaster caused by the goaf water is effectively treated.