Flow Settlement Law and Construction Parameter Optimization of Filling Slurry in High Stage Stope of Zhongguan Iron Mine
In order to explore the flow and settlement law of filling slurry in high-stage stope of Zhongguan Iron Mine and improve the filling quality,the flow and settlement theory of filling slurry in high-stage stope,the slurry settlement model of non-limited boundary and lubrication layer effect were expounded.The particle migration characteristics and settlement behav-ior of filling slurry in the stope were studied by numerical simulation software.The number and location of filling slurry inlets under different stope lengths were optimized,and the flow and settlement characteristics of filling slurry in the stope were re-vealed.The results show that the filling slurry forms a conical distribution after flow and deposition in the stope,and when the coarse aggregate in the slurry reaches a certain threshold,it is divided into coarse particle area,fine particle area and lime sand area.The distribution of settling velocity of solid particles in slurry is significantly different.The settling velocity at the inlet of slurry is the largest.The settling velocity decreases when extending along the x-axis,and increases when extending along the z-axis.When the stope length increases from 30 m to 40～60 m and 70～80 m respectively,the number of filling slurry inlets is set to one,two and three respectively,which can improve the filling quality.When the stope length reaches 90 m,three slurry inlets are also set up,but one quarter and three quarter of the slurry inlets need to be moved 2.5 m to both sides along the length direction of the stope to improve the uniformity of the flow distribution of solid particles in the slurry.The research re-sults can provide a theoretical basis for improving the quality of filling mining.
filling slurryflow settlementparticle migrationnumerical simulationdischarge port optimization
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