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中文摘要：
为研究裂隙对岩体冲击韧性及破坏模式的影响规律,以及裂隙岩体在高应变率下的动态破坏特征,采用摆锤式冲击实验机对裂隙及完整岩体进行了不同冲击速度、不同裂隙条件下的冲击实验。实验结果表明,对长度相同的完整试件而言,试件直径越大,即试件体积越大,试件破碎就越充分,断面也越不规整;试件中的裂隙长度越长,试件破坏时的吸收功就越小,冲击韧性也越小,试件吸收功和冲击韧性随裂隙长度的增加而减小;试件裂隙角度越大,试件破坏断面就越不规整,试件破坏后的块度也越不均匀,试件吸收功和冲击韧性随裂隙倾角的增大而减小。
英文摘要：
In order to study the effect law of the crack on rock mass impact toughness and failure mode and its dynamic failure characteristic under high strain rates, a series of impact tests were conducted on crack and intact rockmass with different impact velocity and crack condition by pendulum-type impact test machine. The test results showed that, to the intact sample with the same length, the fragmentation of the sample was more full and the cross section was more irregular if the sampled diameter was larger. When the crack in the sample was longer, the absorbed energy and impact toughness were less. The absorbed energy and impact toughness decreased with the increase of crack length. When the dip angle of the crack was larger, the failure area of the sample was more irregular and the block size was more uneven. The absorbed energy and impact toughness decreased with the crack dip angle increasing.
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