摘要
岩体裂隙长度对工程岩体的承载能力及隔水性能影响显著,通过对不同裂隙长度的岩样开展单、双裂隙加载实验,探究了不同预制裂隙长度对大尺寸岩体裂隙扩展的影响规律。研究表明:在岩样裂隙长度逐步增加的过程中,裂隙扩展速度不断加快,与此同时,岩样的承载能力不断减弱;次生共面裂隙的产生是大尺寸岩样突然破坏的前兆。
The crack length of rock mass has a significant influence on the bearing capacity and water insulation performance of engineering rock mass. In order to explore the influence characteristics of fracture length on fracture evolution and fracture of large-size rock mass, single-fracture and double-fracture loading tests were carried out on rock samples with different fracture length. The study shows that with the increase of the crack length of the rock sample, the crack expansion speed continues to accelerate. At the same time, the bearing capacity of the rock sample is gradually weakened. The generation of secondary coplanar fractures is the precursor of sudden failure of large size rock samples.
作者
程斌斌
傅子群
陈军涛
Cheng Binbin;Fu Ziqun;Chen Juntao(China Center for Safety Research,MEM,Beijing 100713;Shandong University of Science and Technology,Shandong Qingdao 266590)
出处
《山东煤炭科技》
2022年第12期163-165,共3页
Shandong Coal Science and Technology
关键词
大尺寸岩样
裂隙长度
声发射
次生共面裂隙
large size rock sample
crack length
sound emission
secondary coplanar fracture
