Abstract: Cut-and-filling stoping method plays the great part in underground metal mining.In order to successfully introduce the foreign advanced technology-foam concrete technology in cut-and-filling stoping method and widely use it in domestic，the east stope of F17 in the third mining stope is chosen as the testing place because of its unique geological conditions.Through detecting foam mortar strength of filling body in nine different route of the No.1 stope of the third mining stope，it is shown that the strength of the foam slurry filling has already reached the strength index of filling body.At the same time，in comparison with ordinary mortar filling body，the foam mortar filling body has such advantages as light weight，easy mobility，equilibrium，anti-segregating，high supporting pit roof rate，and low cost.Thus it can be concluded that the foam slurry filling technology is economic and feasible in the east area of F17 in the third mining stope.

Key words: Cut-and-filling stoping method, Foam mortar filling, Mechanical strength, Economically feasible