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采用1:100的相似比进行放矿物理模拟实验,将矿样破碎后按粒级组成分为Ⅰ和Ⅱ这2组矿样,进行了模拟放矿实验,通过拟合得到了放矿高度为55,95,145m时的放出椭球体;大块含量高的粒级组成Ⅱ放出体短半轴比粒级组成Ⅰ大20%,但大块含量的增加导致放矿卡斗堵塞频率增大,粒级组成Ⅱ的堵塞频率为Ⅰ的7倍;此外,矿岩孔隙当量直径越大,细小颗粒穿流现象越明显,细粒含量较多的覆盖层能使矿石贫化率提高3倍以上,含水量也是影响崩落矿岩流动性的重要因素,含水率在10%左右的矿岩抗剪强度较大.
The similar experiment of 1: 100 was used to carry out the ore physical simulation experiment. After the ore samples were crushed, the ore samples were divided into two groups Ⅰ and Ⅱ according to the grain-size composition, and the simulation experiments were carried out. The height of the ore-dressing was 55,95,145m release of the ellipsoid; large size of the particle size of the composition Ⅱ release body short semi-axis larger than the grain size composition Ⅰ 20%, but the increase in bulk content led to the capping frequency of the capping increases, grain In addition, the larger the pore equivalent diameter of ore rock, the more obvious the phenomenon of small particle throughflow, and the coating with more fine-grained content can increase ore dilution rate more than 3 times, including The amount of water is also an important factor that affects the fluidity of the caving rock. The ore rock with a water content of about 10% has a large shear strength.