层状岩石抗压强度围压效应各向异性研究

Anisotropy Study on Confining Pressure,Effect about Compressive Strength of Bedded Rock

本文通过系统试验对层状岩石单轴抗压强度各向异性进行了综合研究,并借助于声发射技术测试了不同方向加载时岩石声发射事件特征,发现层状岩石变形破坏过程中声发射事件率及主频值具有明显的各向异性,从而揭示了层状岩石变形破坏机制各向异性是强度各向异性的根源.在此基础上,作者对同一岩石的三轴试验结果进行了分析研究,得出围压对层状岩石抗压强度的影响也具各向异性的结论.最后通过系统的理论分析得出了与实验结果相符的围压效应各向异性的一般规律(见丈中(1)、(2)、(4)式).

In this paper,the anis otropy Law of compressive strength and deformed-broken mechanism of dedded rock is studied by systematic compressiveexperiments and acoustic emission tests.Then through analysing the experi-mental result of triaxial test about the same rock.the anisotropy of con-finnig pressure effect is discovered.Finally,the general laws of the ani-sotropy(eq.(1),(2),(4))are set ut by theoetical analysis.