【作者】 颜志丰； 琚宜文； 侯泉林； 唐书恒；

【Author】 YAN Zhifeng~1 JU Yiwen~1 HOU Quanlin~1 TANG Shuheng~2 (1.College of Earth Science,Graduate University of Chinese Academy of Sciences,Beijing 100049 2.School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083 China)

【机构】 中国科学院研究生院地球科学学院； 中国地质大学(北京)能源学院；

【摘要】 为模拟研究煤储层水力压裂效果,对煤样进行了饱水条件下的常规单轴压缩试验和声发射测试。对结果进行分析表明:在常规单轴压缩条件下,煤在平行层面上其力学性质具有方向性差异,平行面割理方向的单轴极限抗压强度要比垂直面割理方向的单轴极限抗压强度大得多,其弹性模量也大得多。煤样在垂直面割理方向弹性模量E随着单轴极限抗压强度σc的增加而增加,相关性较高,平行面割理方向弹性模量E随着抗压强度的增高而增高,但离散性较大。在单轴压缩条件下煤样变形破坏表现出的全应力—应变曲线形态大体可以概括为3种类型。更多还原

【Abstract】 In order to simulate effect of hydraulic fracturing in coal reservoir,conventional uniaxial compression test and acoustic emission test on the water-saturated coal samples were hold.The results showed that the mechanical properties in parallel to the level of coal have directional difference.Under the conditions of conventional uniaxial compression.The uniaxial limit compressive strength in direction parallel to the face cleat is much larger than it in the vertical,so is the elastic modulus.The elastic modulus of coal increased with the increasing of compressive strength,however it is higher correlation in the direction of vertical face cleat,but a larger dispersion in parallel.The complete stress-strain curve shape showed by deformation of coal samples under uniaxial compression can be roughly summarized as 3 types.更多还原