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岩体力学实验中,加载速度对岩体力学性质的影响是很重要的。许多岩体力学工作者,利用岩块和模型材料,进行了大量有关室内加载速度对岩体力学性质影响的研究,为室内岩块力学试验和野外原位岩体力学试验选取合理加载速度提供了依据。目前,基本上从应变速率和应力速率两方面去研究加载速度对岩体力学性能的影响。这两方面的研究都认为随着应变速率和应力速率的增加,岩块和岩体的强度、变形模量也相应增加,不同的是峰值强度以后的破坏后效不同。
In rock mechanics experiments, the influence of loading speed on the mechanical properties of rock mass is very important. Many rock mechanics workers, using rock mass and model materials, have conducted a great deal of research on the influence of indoor loading speed on the mechanical properties of rock mass. They provide a reasonable loading speed for the mechanics of rock mass in laboratory and the field test of in-situ rock mass in accordance with. At present, the influence of loading speed on mechanical properties of rock mass is basically studied from two aspects of strain rate and stress rate. Both of these studies suggest that with the increase of strain rate and stress rate, the strength and deformation modulus of rock mass and rock mass increase correspondingly, except that the post-peak failure strength will have different post-failure effects.