摘要
为了探究含不同固结时间料浆的裂隙岩石在破坏过程中的差异性,基于数字图像相关方法,对料浆固结时间分别为7,14,28d的裂隙花岗岩进行单轴压缩实验,系统地分析了裂隙岩石在破坏过程中的裂纹扩展、贯通规律。研究表明,在裂隙岩石的裂纹扩展过程中,前期均以裂隙尖端形成的翼裂纹主导破坏,后期存在着不同。当固结时间为7d时,裂隙岩石以翼裂纹与次翼裂纹主导破坏;当固结时间为14d时,裂隙岩石则以次翼裂纹主导破坏;当固结时间为28d时,裂隙岩石以翼裂纹、预制裂隙中部的拉裂纹主导破坏。相关成果对地下采矿工程中的裂隙岩体稳定性研究具有一定的参考价值。
In order to explore the difference in the failure process of fractured-filled rocks with different consolidation time of slurry,uniaxial compression experiments were carried out on fractured rock with consolidation time of 7,14,28 dbased on the digital image correlation method.The crack propagation and penetration laws of fractured rock were analyzed systematically.The results showed that in the crack propagation process of fractured rock,the wing crack formed at the crack tip led failure in the early stage,and in the later stage it was different.When the consolidation time was 7 d,the fractured rock was destroyed by wing crack and anti-wing crack.When the consolidation time was 14 d,the fractured rock was dominated by anti-wing crack.When the consolidation time was 28 d,the fracture rock was destroyed by wing crack and tensile crack in the middle of prefabricated crack.The relevant results had a certain reference value for the study of the stability of fractured rock mass in underground mining engineering.
作者
司洁萌
郝家旺
SI Jiemeng;HAO Jiawang(Department of Economics and Management,Tangshan Normal University,Tangshan,Hebei 063000,China;College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei 063200,China;Mining Development and Safety Technology Key Lab of Hebei Province,Tangshan,Hebei 063200,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第1期68-71,共4页
Mining Research and Development
基金
河北省自然科学基金项目(E2015209176)
关键词
裂隙岩石
固结时间
裂纹扩展
数字图像相关方法
Fractured rock
Consolidation time
Crack propagation
Digital image correlation method
