中国矿山工程

Backfilling treatment of open pit is an effective way to realize ecological treatment of open pit mining area and solve the problem of tailing surface accumulation. Based on the engineering background of Dagushan Iron Mine of Angang Group, this paper preliminically determined the range of parameters such as the concentration of slurry ratio and the ratio of ash and sand through preliminary tests, and conducted a comprehensive test on the basis of this range. The uniaxial compressive strength and shear strength parameters of the cemented specimens were measured. Based on the comprehensive test results, the influences of lime sand ratio, slurry concentration, curing age and other factors on the uniaxial compressive strength and shear strength parameters of the cemented body are obtained, which provides a reliable reference for the subsequent backfilling treatment of open pit.