论文部分内容阅读
放出体形态研究是研究崩落矿岩流动规律和确定最优采场结构参数的基础.基于标志颗粒法,通过底部与端部放矿物理实验,研究无限边界条件和半无限边界条件下放出体形态及其变化规律,验证期望体理论的可靠性和适用性.在此基础上,开展了18 m×20 m结构参数下端部放矿崩矿步距的优化实验研究.研究结果表明:实际放出体形态并不是标准的椭球体,而是与期望体更为相近;在无限边界条件和半无限边界条件下,放矿量与放出体高度满足幂函数关系,与放出体半径满足指数函数关系;建议在18 m×20 m结构参数下,优先选用无贫化放矿方式和4.6 m的崩矿步距.
Based on the sign particle method, through the physical experiments at the bottom and the end of exhumation, the effects of the infinite boundary conditions and the shape of the released body under the semi-infinite boundary conditions are studied. And its variation rule to verify the reliability and applicability of the expectation volume theory.On this basis, the optimal experimental study on the crushing pace at the end of the orebody with the height of 18 m × 20 m was carried out.The results show that: The shape is not a standard ellipsoid, but is more similar to the expectation body. Under infinite boundary conditions and semi-infinite boundary conditions, the relationship between the amount of ore discharge and the height of the emitter meets the power function and the radius of the emitter meets the exponential function. Under the 18 m × 20 m structural parameters, the non-depleted ore extraction method and the 4.6 m collapse step are preferred.