原生矸石连续级配压缩实验研究

Research on Continued Gradation Compression Experiment of Primary Coal Rejects

针对矸石压缩实验中存在的方法单一,理论欠缺的现状,文章以泰波理论为基础通过两套实验方案对原生矸石性质进行研究。根据实验时实时监测的应力—应变以及压缩变形数据得出:较小粒径的矸石在级配中占大比例时矸石压缩率小;根据泰波理论进行连续级配实验,得出当n值为0.3时为最优级配;对比发现符合泰波理论配比的矸石压缩率低于原生矸石的压缩率,在充填时能够很好的控制地表沉降,充填效果好。

According to the method single and theoretical shortage existed in the coal rejects compression experiment, base on the Talbol＇s theory, two sets of the experiment plans were applied to the research on the properties of the primary coal rejects. According to the real time measured stress - strain and the compression deformation data obtained from the experi- ments, the coal rejects with small diameters would have a small compression rate when the coal rejects were taken a large percentage in the gradation. A continued gradation experiments were conducted according to Talbol＇s theory and when the n value was 0. 3, the optimum gradation would be obtained. With the comparison, the compression rate of the coal reject met with Talbol＇s theory would be lower than the compression rate of the primary coal rejects. The coal rejects for backfill would be well to control the surface subsidence and would have good backfill effect.