自然崩落采矿法的颗粒流数值模拟

以自然崩落采矿法为研究对象,利用二维颗粒流数值模拟(PFC2D)的原理和方法,研究了自然崩落法矿体崩落规律. 以某镍铜矿的地质条件及矿岩物理力学性质为依据,采用数值模拟的方法分析了自然崩落法的崩落规律. 结果表明:PFC2D模型在分析自然崩落过程中力学机理的同时,能有效地模拟自然崩落法采矿过程,并且能直观地给出矿体在崩落过程中各种参数的具体形态变化. 利用PFC2D模型预测该镍铜矿自然崩落法初始崩落拉底半径为10 m,连续崩落的拉底半径为22 m,有效地指导该矿自然崩落法的放矿.

Numerical simulation of natural caving method based on particle flow code in two dimensions

According to the theory and method of particle flow code in two dimensions (PFC2D), the block caving law of natural caving mining method was investigated. Based on the geologic conditions and the physical and mechanical properties of rock in a nickel-copper mine, the caving law in natural caving mining method was simulated by numerical method. The results show that the mechanical mechanism of natural caving method can be analyzed by PFC2D modeling, and the mining process of natural caving method is simulated effectively. The parameter variation of rockbody during the process of mining can be demonstrated easily. The initial caving radius of undercut in the mine is 10 m, and the continuous caving radius of undercut is 22 m. The numerical modeling is effective to guide the mining process of natural caving mining method in the mine.