深部资源赋存环境具有高地应力、高渗透压和高地温的本真特征，而强扰动和强时效的附 属特性对深部多场多相耦合的渗流理论具有重要意义。 深部岩体力学理论研究经常涉及时效特 征，因此需要对强时效进行科学定义。 结合深部岩体赋存特征及资源开采流程给出了深部强时效 的含义，并提出强时效包含 3 个方面内容，分别为加速蠕变、脆延转换和物理力学参数弱化。 通过 非线性流变理论确定蠕变加速阶段发生条件，从而对深部岩体强时效特征进行研究。 根据已有流 变理论归纳出岩体发生加速蠕变需达到临界损伤阈值的结论，而临界损伤阈值可以由非弹性体积 应变、孔隙率变化或声发射数据确定。 岩石单轴或三向应力条件下蠕变实验可从应变加速度判别 强时效起始点。 针对岩石流变本构模型可通过流变微分方程稳定性判别强时效条件。 在分析岩石 非线性流变微分方程的基础上提出强时效特征下岩石应变加速度与应变率符合一定的幂率关系，具体参数可由实验数据确定。 对岩体应变、应变率及应变加速度曲线分析可知，应变加速度曲线出 现的 2 个拐点即可作为蠕变衰减-稳态和稳态-非稳态阶段转换的临界值。 通过深部煤体三轴流 变实验数据确定强时效发生的起始位置，并对强时效条件下应变加速度与应变率相关方程中参数 进行拟合。 依据深部煤体采动应力路径进行了卸围压蠕变-渗流实验，进而分析出强时效阶段煤 体渗透率会急剧增大的特点。

The environment of deep resources is characterized by high in⁃situ stress，high seepage pressure and high temperature. The subsidiary characteristics of strong disturbance and strong timeliness are of great significance to the seepage theory of coupling multi⁃field and multi⁃phase at depth. The study of deep rock mechanics often considers the aging characteristics，thus it is necessary to define the strong timeliness scientifically. Combining with the occurrence characteristics of deep rock mass and the process of resource exploitation，the meaning of deep strong timeliness is given. It is proposed that strong timeliness includes three aspects:accelerated creep，brittle⁃duc⁃ tile transition and weakening of physical and mechanical parameters. The onset of tertiary creep is determined by the non⁃linear rheological theory， and the strong aging characteristics of deep rock mass are studied. According to the existing rheological theory，it is concluded that the critical damage threshold for the accelerated creep of rock mass should be reached，and the critical damage threshold can be determined by non⁃elastic volume strain，po⁃ rosity change or acoustic emission data. The creep test of rock under uniaxial or triaxial stress can distinguish the start⁃ ing point of strong timeliness from strain acceleration. According to the rheological constitutive model of rock，the strong timeliness condition can be determined by the stability of rheological differential equation. Based on the analysis of rock non⁃linear rheological differential equation，a power⁃law relationship between strain acceleration and strain rate is proposed under strong aging characteristics. The specific parameters can be derived by experimental data. The anal⁃ ysis of rock strain， strain rate and strain acceleration curve shows that the two inflection points of strain acceleration curve can be used as the critical values of creep attenuation⁃steady⁃state and steady⁃tertiary state phase transition. Based on the triaxial rheological experimental data of deep coal，the onset of strong timeliness is de⁃ termined，and the parameters in the equation of strain acceleration and strain rate under strong aging condition are fit⁃ ted. Based on the mining stress path of deep coal，the creep⁃seepage experiment of unloading confining pressure is carried out，and then the characteristics of coal permeability increasing sharply under strong timeliness are ana⁃ lyzed.