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现有关于动荷载下岩石特性规律的资料把岩石视为单一的介质,是以简单的应力—应变状态试验结果为依据的。据观察,在具有变化的轴向压力和不变的侧向压力的静荷载和动荷载下,由于不同的结构,各种岩石会在不均匀压缩下松散。在动荷载作用于岩体的通常情况下(撞击、爆破等),应力张量的所有分量都随时间而变化。由于缺乏上述条件下的岩石特性试验资料,我们进行了细致的试验研究。为了进行实验,我们研制了一种设备,能够在下列应力状态下用全向压力和孔隙压力的独立模拟进行岩石试验:
The existing data on the characteristics of rock under dynamic loading treat rock as a single medium based on simple stress-strain test results. It is observed that under static and dynamic loads with varying axial pressure and constant lateral pressure, various rocks will loose under inhomogeneous compression due to the different structures. In the usual case of dynamic loads acting on a rock mass (impact, explosion, etc.), all components of the stress tensor change over time. Due to the lack of rock properties under the above conditions, we conducted a detailed experimental study. For the experiment, we developed a device that can perform rock tests with independent simulations of isotropic and pore pressures under the following stress conditions: