自然崩落法放矿数值模拟研究

Numerical Simulation Research on the Ore Drawing of Block Caving Method

普朗铜矿拟采用自然崩落法进行开采。结合普朗铜矿的实际情况,采用颗粒流数值软件模拟计算放矿过程,对放矿高度对放出体的发育情况的影响进行了研究。结果表明,在放矿高度低于60m时,放出体基本为椭球体形状,随着放矿高度增加,椭球体的偏心率逐渐增加,呈现"柱形"放出体形态;在放矿口间距为14m时,两漏斗在放矿过程中很快相互影响,没有形成明显的脊部损失和过早贫化现象,证明放矿口间距选择合理。

Pulang Copper Mine plans to use the block caving method.Combined with the actual situation of this mine,particle flow numerical simulation software was used to simulate the process of ore drawing.The influence of different ore drawing heights on the development of drawn body was researched.The results showed that when the ore height was less than 60 m,the drawn body substantially was ellipsoid shape,and with the increase of ore height,the ellipsoid eccentricity gradually increased and presented a pillar shape.When the ore drawing hole spacing was 14 m,two funnels quickly interacted in ore drawing without obvious ridges loss and premature depletion phenomena,which proved that the choice of drawing hole spacing was reasonable.