A non-linear regression analysis of the strength of high-concentration tailings cemented backfill was conducted using a lead-zinc tailings of a mine as a research object.The 7 d,28 d,and 56 d of slurry samples with mass concentrations of 72%,74%,76%,78%,and 80%,the ratio of 1∶4,1∶8,1∶12,and 1∶16,respectively uniaxial compressive strength was subjected to nonlinear regression analysis.Comprehensive comparison of experimental results,analysis obtains:lime-sand ratio and filling body strength follow a quadratic function,mass concentration,age,...