深部采空区尾砂胶结充填体强度特性试验研究

Experimental study on strength characteristics of tailings cement backfilling at deep-seated mined-out area

采空区充填体可以改善围岩应力状态、限制围岩移动的规模,维护空区的稳定性和地表的生态环境。根据充填体作用的机理,利用正交试验研究影响尾砂充填体强度的因素,优选出符合工程需要的尾砂胶结充填体材料配比,分析了该配比下的充填体强度特性。结果表明,充填体可以有效地限制该矿区的地压活动,对于资源的二次利用和环境保护也有较大意义。

Stability of mined-out area is maintained by improving the state of stress and restricting its displacement in surrounding rock with backfilling; and environment is also protected on the earth surface. Based on the mechanism of the backfilling, the influences of material factors on the backfilling are analyzed; and the optimal mixing proportion of materials is found with orthogonal experiment; and the characteristics of the backfilling with optimal mixing proportion are studied. The results show that the backfilling can restrict geostatic activity, protect environment, and facilitate the reuse of resources of the mine.