中硬煤大煤样的压裂实验研究

Experimental Study of Crack Characteristic of Big Medium-hard Coal Samples

在真三轴压力机上通过对王庄矿中硬煤大煤样的压裂实验 ,得出了中硬煤在强度、变形方面的基本力学特性 ,探讨了中硬煤的裂隙演化过程 ,即裂隙演化经历扩展、加密。

Through the crack test of big medium hard coal samples from Wangzhang Mine on real triaxial test machine , the fundamental properties of strength and deformation are obtained and the crack evolutionary way is discussed . The process of crack evolution has four stages,that is,locally number increasing ,relocally extending,reincreasing and reextending.