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通过平面应力条件下闭合断续节理岩体的破坏试验，采用自行研制的高压柔性加载装置施加垂向和侧向荷载，用千分表和激光散斑照相技术量测试体位移场，用应变花量测试体平面应力场． 结果表明，激光散斑法用于测定闭合断续节理岩体的位移场效果良好，其测值比对应点千分表测值偏小１４％ 左右．据所测得的位移场和应力场，研究了裂纹尖端应力场的演变及裂纹扩展的路径，分析了试体的变形和破坏特征，测定了翼裂纹初裂角，探讨了试体的破坏机理．
By means of the failure test of the closed jointed rock mass under plane stress conditions, the vertical and lateral loads were applied by a self-developed high-pressure flexible loading device, and the body displacement field was measured with a micrometer and a laser speckle photographic technique. Volume plane stress field test. The results show that the laser speckle method is effective for measuring the displacement field of closed and intermittent jointed rock masses, and its measured value is about 14% smaller than that of the corresponding point dial indicator. According to the measured displacement and stress fields, the evolution of the stress field at the crack tip and the path of the crack propagation were studied. The deformation and failure characteristics of the specimen were analyzed, the initial crack angle of the wing crack was measured, and the failure mechanism of the specimen was discussed. .