采用变形渗流试验和渗流试验2种试验方案,对比研究矸石在时效性变形过程中的渗透特性,并得到了各级应力水平下渗流稳定时矸石的渗透系数。研究表明:对质量和初始堆积高度相同的散体矸石,由于初始孔隙结构的差异,渗流试验中岩样在各级应力水平下的位移都高于变形渗流试验中的位移;随着岩样的压密及破碎,岩样中孔隙压力的量级从千帕增加到兆帕,在相同的渗流速度下,孔隙压力-时间曲线不易达到稳定状态;在相同的轴向应力及渗流速度作用下,岩样的变形对其渗透系数有很大影响,2种试验中岩样的渗流试验渗透系数小于变形渗流试验系数。

Two plans of the deformation vadose test and the vadose test were applied to compare and study the penetration features of the coal rejects during the t ime related deformation process and the penetration coefficients of the coal rejects when the vadose was stabilized under each grade stress level were obtained.The st udy showed that as for the bulk coal rejects with same quality and same initial pile height, due to the differences of the initial pore structures, the displacement value of the rock samples in the vadose test under each grade stress level would all be higher than the displacement of the samples in the deformation vadose test.With the co mpression density and crushing of the rock samples, the order of the pore pressure in the rock samples would be increased from kPa to MPa and under the same vados e velocity, the pressure-time curves of the pore would not be easy to reach stabilized status.Under the same axial stress and vadose velocity the deformation of the roc k sample would have high influences to the penetration coefficient.The study results showed that rockOs penetration coefficient in vadose test is smaller than that is in deformation vadose test.

国家自然科学基金资助项目(50974107、50674087)；江苏省“青蓝工程”资助项目(10QLD006)；中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金资助项目(SKLGDUEK1014)；