Simulation of Rheological Properties of Ore Rock in JM Mine Based on Parameter Correction Model
The rheological properties of ore rock in natural caving method have an important influence on the law of ore rock caving.In order to clarify the rheological properties of ore rock in JM Mine,based on the rheological test results of on-site ore rock samples,the appropriate constitutive model was selected through analysis and comparison,and the influences of different parameters on the rheological properties of ore rock were simulated.The results show that among the three constitutive models of Maxwell,generalized Kelvin and Burgers-Mohr,the Burgers-Mohr constitutive model has the best fitting effect on the rheological test data of ore rock in JM Mine,and its fitting correlation coefficient reaches 0.986.The Kelvin shear modulus in the Burgers-Mohr constitutive model mainly affects the initial amount of rock steady creep and the time required to enter the steady creep stage.The Kelvin viscosity coefficient mainly affects the initial creep rate of rock.The Maxwell shear modulus mainly affects the instantaneous deformation of rock rheology.The Maxwell viscosity coefficient mainly affects the initial amount of rock steady creep stage and the slope of the creep stage curve.Without considering the influence of the cutting project and the caving amount during the construction period,the average annual caving amount of the overlying ore rock is 17.6×106 t,which is close to the designed annual production capacity of 18 × 106 t,which verifies the correctness of the parameters in corrected Burgers-Mohr rheological model.The research results can provide an useful reference for studying the law of ore rock caving of natural caving method under similar geological conditions.
Natural caving methodRheological propertyParameter corrected modelThe law of ore rock cavingNumerical simulation
万方数据
维普
