Research on Rock Caving Parameters of Block Caving Method in Pampa de Pongo Iron Mine,Peru
In the process of using natural caving mining,it is necessary to accurately predict the caving behavior of rock masses to ensure safe production operations.In order to explore the behavior of rock caving,the spatiotemporal evolution law of block caving method rock caving was analyzed in depth through numerical simulation.Based on FLAC3D software,a three-dimensional model of the actual strata of Peru Pampa de Pongo Iron Mine was constructed,and combined with the Burgers Mohr constitutive model,key technical parameters such as the initial and continuous caving undercut area,the continuous caving velocity,the entire process of undercut surface subsidence,and the amount of ore rock caving were studied.The research results indicate that the initial and the continuous caving and undercut areas of Pampa de Pongo Iron Mine are between 864-1 350 m2 and 5 400-6 534 m2 respectively,the continuous caving velocity being 0.311 2 m/d.After all undercutting is completed,the total amount of ore rock caving is 630.12 million tons,which can meet the design production capacity requirements.The results of this study provide new ideas and methods for the study of key technical parameters of the block caving method.
block caving methodundercut areacaving velocitycaving law
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