Optimization Test of Waste Rock Fine Tailings Filling Performance Based on Response Surface Methodology
To obtain the optimal ratio of waste rock and fine tailings filling that meets the requirements of mining strength,a preliminary experiment is conducted based on the stacking density and slurry concentration of the mixed aggregate to obtain the range of ratio;On this basis,a regression model was established using the response surface method,with the compressive strength of the waste rock fine tailings filling body at 3,7,and 28 d as the response values.The influence of three factors,namely aggregate ratio,concentration,and lime sand ratio,on the strength of the filling body was revealed.The optimal filling ratio was selected through the regression model and verified through semi-industrial experiments.The results show that when the filling body is cured for 3 and 7 days,the interaction effect of concentration and lime sand ratio is significant;When the filling body is cured to 28 days,the interaction effect between aggregate ratio and concentration is significant.When the aggregate ratio is 1∶3,the concentration is 82％,and the ash sand ratio is 1∶4,the filling performance of waste rock fine tailings fully meets the filling requirements of the mine,providing a theoretical basis for optimizing the filling performance of waste rock fine tailings mixed aggregate paste.
response surface methodfilling with waste rock and fine tailingsslurry ratiostrength of filling body
NETL
NSTL
万方数据
维普
