Strong draining and seepage-based upstream type tailings pond fill dam and damming technology thereof

The invention discloses a strong draining and seepage-based upstream type tailings pond fill dam. The strong draining and seepage-based upstream type tailings pond fill dam is built by an upstream type damming method on the basis of a two-level dam structure of a tailings pond, wherein the two-level dam structure comprises a primary dam and a seepage-prevention dam; fine-grain tailings are piled up in an upper pond of the seepage-prevention dam, and coarse-grain tailings are piled up in a lower pond between the primary dam and the seepage-prevention dam; a tailings pond bearing body is formed by the coarse-grain tailings under the action of hydraulic classification; the seepage-prevention dam is taken as a dividing line for the upper pond and the lower pond, and the seepage lines of the upper pond and the lower pond intersect on the seepage-prevention dam. The damming technology of the tailings pond fill dam comprises the following steps: firstly, constructing to build the seepage-prevention dam to cause the upper pond to form a coarse-grain tailings depositing beach; then, constructing the primary dam in the downstream area of the seepage-prevention dam, respectively piling up the fine-grain tailings and the coarse-grain tailings in the upper pond and the lower pond, and lifting the fine-grain tailings to the upper pond by a pump ship in a temporary stagnant area in the upstream area out of the depositing beach; finally, the tailings are piled to a final elevation by an upstream type damming method. The strong draining and seepage based upstream type tailings pond fill dam is favorable for further improving the safety and the economy of the tailings pond by combining with the advantages of the upstream type damming method.