微破裂 meaning in English
microfracture
Examples
- Test technique for short - breakdown test in cbm well and its application
煤层气井微破裂试验测试技术及应用 - The fault controlled the magmatism and metallization relevant to the contact zone , and deformed successively and produced cataclastic rocks and two sets of joints ; the second stage was from late cretaceous to eocene . the fault zone deformed right - laterally under ne - sw striking transtention , and new joints zone was produced at the end of the two main faults because of local stress concentration . the fault produced inchoative cataclastic rocks , and two sets of typical joints in plutons ; the third stage of deformation was relatively faint and only a little of microcracks was produced and infilled with vei ns in the deformed rocks , which was during the himalayan movement
其后的继承性活动在断裂带内形成碎裂程度最强达到碎裂岩的碎裂岩系列构造岩，变形带两侧发育两组典型的共轭剪节理；第二次在晚白垩世?始新世，断裂在北东?南西向近水平挤压作用下右行张扭性活动，断裂带两主断裂在斜列重叠的端部由于局部应力集中进一步扩展形成节理带，而断裂在岩体区也发育两组典型的共轭剪节理，断裂内形成初碎裂岩为主的构造岩；第三次是喜山期以西侧抬升、东侧下降的强烈升降为主的活动，在基岩中，主断层两侧围岩出现微破裂。 - Barrier cracks cannot stop the extending of a fracture , and the strength of the sample is reduced by almost one magnitude because of the existing barrier cracks . there are great differences of ae distribution between specimens with non - penetrate crack and specimens with penetrate crack . as for penetrate crack , ae occurs near the two end of the crack , and for non - penetrate crack , crack , ae occurs near the two end of the crack , and for non - penetrate crack , ae occurs near the front edge of crack , which can be explained well by the theory of 3 - d fracture ; ae distribution near the outer part of collinear crack is similar with that of the end of penetrate crack , and inner part of collinear cracks will run - through with high loads
关于预制裂纹系对岩石破裂的影响，集中讨论了：空障碍体构造不能阻止主裂纹的扩展，反而会使岩石的破裂强度降低近一个量级；由于构造的不同，非穿透切口样品和穿透切口样品的声发射空间分布特点有本质区别，穿透切口样品的微破裂在切口两端发育，而非穿透切口样品的微破裂在切口两端之间切口前缘处发育，这用三维破裂理论可以很好地解释；含共线构造的岩石，裂纹外端的声发射分布与单裂纹构造中裂纹端部的声发射分布相似，裂纹内端声发射有密集分布，在应力达到一定水平时，内端部发生错断，而不是贯通。