Abstract: The goaf was filled in B909 working face of Pingshuo Anjialing No.2 underground coal mine of Chinacoal to realize the safety and high-efficiency.To meet the needs of construction and mining，Ruimi material and Foamed cement were confirmed as the filling material after a variety of comparative choices.The results of the compressive strength test and the splitting tensile strength test showed that the materials mentioned were with well mechanical properties，and they could fulfill the requirement of filling mining.

Key words: Goaf of small coal mine, Filling material, Ftrength, Filling repeated mining