某矿充填材料物理力学参数试验研究

Experimental study on physical and mechanical parameters of filling materials in a mine

以某矿尾砂为例，通过物理化学试验得出该尾砂中不具有其它有毒有害物质，可作为充填材料，同时得到了尾砂粒级组成及渗透系数。通过抗压强度试验、剪切试验及承压变形试验得到了不同浓度、砂灰比在不同养护龄期的物理力学参数，蒙古砂的加入使内摩擦力、内凝聚力、弹性模量和泊松比力学参数都明显增加。

Taking the railings in a mine as an example, through physical chemistry experiment, the result shows that the tailings have no other poisonous and harmful substances and can he used as filling materials, and the experiment obtains the railings graded composition and the permeability coefficient at the same time. Based on compressive strength test, shear test and pressure deformation test, different physical and mechanical parameters with different concentration and ratio of sand in different curing age had been obtained. The adding of Mongolia sand can make internal friction, cohesion, elastic modulus and poisson＇s ratio mechanics parameters significantly increase.