| 滇东黔西松软煤岩三轴压缩力学特性及能量演化特征 |
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| 引用本文： | 侯连浪,刘向君,梁利喜,张平,谢斌,李丹琼.滇东黔西松软煤岩三轴压缩力学特性及能量演化特征[J].中国安全生产科学技术,2019,15(2):105-110. |
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| 作者姓名： | 侯连浪 刘向君 梁利喜 张平 谢斌 李丹琼 |
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| 作者单位： | （1.西南石油大学 油气藏地质及开发工程国家重点实验室，四川 成都 610500；2.中联煤层气有限责任公司，北京 100015） |
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| 基金项目： | 基金项目: 国家科技重大专项课题（2016ZX05044-004-001）；西南石油大学非常规地层岩石物理青年科技创新团队项目（2018CXTD11） |
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| 摘 要： | 为促进滇东黔西地区煤炭资源安全高效开发，开展了不同围压下的三轴压缩试验，研究了该地区松软煤岩的压缩力学特性及能量演化特征。研究结果表明:裂隙增大了松软煤岩差应力-应变曲线峰后下降的速率，差应力-体积应变曲线从峰前屈服阶段开始左拐，表现出扩容现象，达到峰值强度后扩容现象愈加明显；围压增强了煤岩承压能力，对煤岩压缩变形过程中径向变形的抑制作用明显；围压条件下，松软煤岩的抗压强度、破坏模式及破坏角均符合Coulomb强度准则；围压几乎不影响弹性能的增长速率，但提高了煤样储存弹性能的能力，受割理等裂隙影响，耗散能与围压无明确相关关系。
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| 关 键 词： | 滇东黔西 煤岩 力学特性 能量演化 |
Triaxial compression mechanical properties and energy evolution characteristics of soft coal and rock in eastern Yunnan and western Guizhou |
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| HOU Lianlang,LIU Xiangjun,LIANG Lixi,ZHANG Ping,XIE Bin,LI Danqiong.Triaxial compression mechanical properties and energy evolution characteristics of soft coal and rock in eastern Yunnan and western Guizhou[J].Journal of Safety Science and Technology,2019,15(2):105-110. |
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| Authors: | HOU Lianlang LIU Xiangjun LIANG Lixi ZHANG Ping XIE Bin LI Danqiong |
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| Affiliation: | (1. State Key Laboratory of Oil and Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu Sichuan 610500, China;2. China United Coalbed Methane Co., Ltd., Beijing 100015, China) |
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| Abstract: | In order to promote the safe and efficient development of coal resource in eastern Yunnan and western Guizhou, the triaxial compression tests under different confining pressures were carried out, and the compression mechanical properties and energy evolution characteristics of soft coal and rock in this area were studied. The results showed that the fractures in the soft coal and rock increased the post peak descending rate of the differential stress strain curve, and the differential stress volume strain curves turned left from the pre peak yield stage, showing the dilatation phenomenon, which became more obvious after reaching the peak strength. The confining pressure enhanced the bearing capacity of coal and rock, and had obvious restraint effect on the radial deformation during the compression deformation process of coal and rock. Under the confining pressure, all the compressive strength, failure mode and failure angle of soft coal and rock met the Coulomb strength criterion. The confining pressure had almost no effect on the growth rate of elastic energy, but it improved the ability of coal samples to store the elastic energy. Under the influence of fractures such as cleats, there was no clear correlation between the dissipative energy and the confining pressure. |
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| Keywords: | eastern Yunnan and western Guizhou coal and rock mechanical properties energy evolution |
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