中文摘要：

为了得到裂隙类岩石的应力分布规律,利用预制中心斜裂纹的类岩石材料进行单轴受压试验。根据有限大板求解裂纹尖端应力强度因子的位移方程,推导出能够直接用于程序运算的方程形式。计算程序中通过修正级数项消除了矩阵的奇异性,通过编制计算程序并结合数字图像相关法测定了类岩石Ⅱ型应力强度因子。计算原理采用了有限大板的应力强度因子计算公式,并考虑了裂面之间的摩擦力。采用最小二乘法求解含未知参数的位移方程组,对30°、45°和60°三种不同倾角裂纹的试件进行对比分析。研究结果表明：采用该方法可以准确测定类岩石材料的应力强度因子,因此这种方法是一种有效测定岩石和类岩石材料应力强度因子的方法。

英文摘要：

In order to obtain stress distrib ution law of rock witii crevice defect,uniaxial compressive test wascarried out by using rock-like materials with prefabricated center oblique crack. According to the displacement equation of t!ie crack tip ） stress intensity factor,the equation form which can be directly used in program operation is deduced. The singularity of t!ie matrix is eliminated by the modified series term in the program,and mode ＇ stressintensity factor is determined by compiling the program and the digital image correlation method. Calculationformula of stress intensity factor for finite plate was used,and the friction force between the crack faces is taken intoaccount. The displacement equations witii unknown parameters are solved by least square method, and thespecimens with 300,450 and 600 inclination cracks are compared and analyzed. The results showthat the method can be used to determine the stress intensity factor of rock-like materials,therefore, this method is an effective method for determining the stress intensity factor of rock and rock-like materials.