Depending on their extension, a differentiation is made between macro and micro-crack.
按裂纹延伸长度，可分为宏开裂和微开裂。
2
It is obtained that the strength of the material decreases as the degree of disorder of micro-crack size distribution increases.
得到了材料的断裂强度随微裂缝长度随机分布无序度的增加而降低的规律性。
3
The induced stress of initial damage zone results in the redistribution of surrounding rock stress when the micro-crack closes after hydraulic fracture.