软煤大煤样的压裂特性研究

Study of Crack Characteristic of Big Soft Coal Samples

在真三轴压力机上通过对五阳矿软煤大煤样的压裂实验，得出了软煤在强度、变形方面的基本力学特性，探讨了软煤的裂隙演化特征，即裂隙演化经历扩展、加密、再扩展与再加密四个过程，所得结论对理论研究和工程实践具有现实的指导意义。

Through the crack test of big soft coal samples from Wuyang Mine on real triaxial test machine,the fundamental mechanical properties of strength and deformation are obtained and the crack evolutionary way are discussed.The crack evolution has four stages,that is,locally number increasing,locally extending,increasing and extending.The conclusions have practical guidance to theoretical research and engineering practice.