Experimental study on transportation performance of high-concentration filling materials in Buritica Gold Mine

Buritica Gold Mine adopts sublevel open stopping and subsequent filling mining method, and the filling aggregate selects beneficiation full tailings.In order to construct the mine filling system scientifically and reasonably, the transportation performance of high-concentration filling slurry of full tailings is carried out.The workability of high-concentration slurry is analyzed by slump bucket test and the concentration range of the filling slurry is determined preliminarily, which is 66%-68%.Based on this, the yield shear stress and viscosity coefficient of the filling slurry are measured by using the hydrodynamic formula.Then the flowing resistance of filling slurry per unit length of pipeline is calculated to provide necessary parameters for mine filling pipeline design.Considering the filling demand of Buritica Gold Mine being 60-100 m³/h, the filling concentration of 66%-68%, and the inner diameter of the underground filling pipe being 150 mm are recommended.The conveying resistance is approximately 2.69-5.74 kPa/m, and the 10 MPa plunger pump could transport the high-concentration filling slurry horizontally for 1.7-3.7 km, which can fully meet the demand for mine high-concentration filling.