Abstract: The distribution of taiiings ienticies refiects the sediment state of taiiings dam, and has infiuence upon the stabiiity of the dam body.The ienticies of the main cross-section of No.2 taiiings dam of Dexing Copper Mine is anaiyzed with box dimension method.The resuit shows that the distribution of taiiings ienticies has the fractai characteristics and the fractai dimension is 1.5024.