【摘要】 露天坑回填治理是实现露天开采矿区生态治理和解决尾矿地表堆存问题的有效途径，本文以鞍钢集团大孤山铁矿为工程背景，通过前期试验探索初步确定了料浆配比的浓度、灰砂比等参数的范围，在此范围的基础上进行全面试验，测定胶结体试件的单轴抗压强度、抗剪强度参数。基于全面试验的试验结果分析得出了灰砂比、料浆浓度、养护龄期等因素对胶结体单轴抗压强度和抗剪强度参数的影响规律，为后续路天坑回填治理提供了可靠的参考依据。更多还原

【Abstract】 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.更多还原