关键词: 分条分层, 倾斜厚矿体, 废石充填, 铁矿

Abstract: The main mining method for Dongdashan inclined thick iron ore bodies is with sublevel caving with its sublevel height of 8～10 m. The ore recovery is about 49.25%～55% and the dilution is about 29.92%～33.37%,which have been maintained for many years. Researches showed that there are many problems in the sublevel caving process,such as large rate of mining-cut ratio,huge ore-drawing loss,and unrecovered roof and bottom pillar etc. According to the problems above,the waste rock fill mining method with the upward slitting stratification is put forward. The operation shows that the recovery can be increased to about 87%,and the dilution rate can be decreased to about 15% by the new mining process. Hence,the mine service life is effectively extended,and the economic benefits are significantly improved. The process can be referred by some other similar mines.

Key words: Slitting stratification, Inclined thick ore body, Rock fill, Iron ore