饱和含水煤岩单轴压缩条件下的声发射特征  

Acoustic emission characteristics of water-saturated coals in uniaxial compression experiment

作　　者：唐书恒[1] 颜志丰[1] 朱宝存[1] 张松航[1] 张佳赞[1] 

机构地区：[1]中国地质大学能源学院,北京100083

出　　处：《煤炭学报》2010年第1期37-41,共5页Journal of China Coal Society

基　　金：国家高科技发展计划(863)基金资助项目(2006AA06Z235);国家自然科学基金资助项目(40772096;40972108);国家重点基础研究发展计划(973)基金资助项目(2006CB202202;2009CB219604);国家科技重大专项课题(2008ZX05034-003)

摘　　要：为了模拟研究煤储层的压裂特征,进行了饱和含水煤岩单轴压缩破裂实验以及声发射测试。结果表明:饱和含水煤岩在单轴压缩条件下首先产生变形,然后出现裂隙,直到最后破坏。根据声发射和应力-应变曲线特征将煤岩压裂过程分为迸裂型、破裂型和稳定型三大类。煤岩压裂过程受试件取样方向影响,当试件轴向平行面割理时,破裂过程出现迸裂型、破裂型,而无稳定型;当试件轴向垂直面割理时,破裂过程出现破裂型、稳定型,而无迸裂型。In order to investigate the fracturing characteristics of coal reservoir, the uniaxial compression experiment was conducted for water-saturated coals, and the acoustic emission testing was carried out simultaneously. The results indicate that water-saturated coals occurre compression deformation first, then fracture, and finally are destroyed. Based on both the acoustic emission characteristics and stress-strain curves characteristics, the fracturing process of water-saturated coals were classified into three types： burst open（ Ⅰ ）, rupture （ Ⅱ） and stable （Ⅲ） Influenced by the sampling direction,the fracturing processes are different. There are type Ⅰand type Ⅱ without type Ⅲ when the axial of specimens parallel to the face cleats, and type Ⅱ and typeⅢ without type Ⅰwhen the axial of specimens perpendicular to the face cleats.

关 键 词：饱和含水煤岩 单轴压缩 声发射 破裂过程 

分 类 号：TU457[建筑科学—岩土工程]