Abstract: A new type cementing material is introduced.It is composed by slag, lime, gypsum and cement, also some additives were added, and the optimal ratio based on the limited test basis.Orthogonal design and test data were used to analyze the influence factors the new type cementing material.Then regression equation between strength and the new type cementing material based on the DPS software was established.At last, the optimal formulation was determined.Results show that the new cementing material strength is 3 times of the 32.5# cement, and its cost is the same as cement materials.So the cost of the filling can decrease as much as 40%～50%.The new type cementing material has already tested and used in Shirengou iron mine.It indicates the feasibility and reliability of this new type cementing material.It plays a good foundation for improving the economic benefits of Shirengou mine.

Key words: Cementing filling, New cementing material, Strength, Orthogonal experiment, Regression analysis, Optimal formulation