摘要
利用自主研制的含瓦斯煤热流固耦合三轴伺服渗流装置及煤与瓦斯突出模拟试验台,对煤岩破断与瓦斯运移耦合作用机理进行了试验分析。研究结果表明:瓦斯运移改变了煤体的力学性质,即降低了含瓦斯煤的强度,加速了其破断进程;在相同围压条件下,瓦斯压力越大,则含瓦斯煤三轴压缩破断程度越高,瓦斯运移通道越多,瓦斯渗流流量则越大;垂直地应力越大,即瓦斯运移越困难的条件下,煤与瓦斯突出强度越大,突出过程中温度下降幅度越大,表明垂直应力越大,煤体破断程度越高,其内部瓦斯解吸量越大,释放出来的能量越多。
By using the self-developed triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing methane and the self-developed coal and gas outburst simulation test device,the coupling mechanism between coal fracture and gas migration was discussed.The result shows that gas can change the mechanical properties of coal,and gas migration can accelerate the failure process;in the fracture process of coal containing methane,the higher the gas pressure is,the higher the seepage velocity is;coal fracture promotes the spreading and stretching of inner pores in coal,and it also makes it easier for gas migration;in the coal and gas outburst process,the higher the vertical stress is,which means under the condition of gas migration is more difficult,the more energy it release and the more powerful the outburst is,and the greater the temperature decreases,it indicates that the greater the vertical stress is,the higher the level of coal fracture is,accompanied by the greater the desorption amount of gas and the more energy released.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第12期2024-2028,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2011CB201203)
国家自然科学基金资助项目(50974141)
国家科技重大专项资助项目(2011ZX05034-004)
关键词
煤岩
破断
瓦斯运移
耦合机理
煤与瓦斯突出
coal
fracture
gas migration
coupling mechanism
coal and gas outburst
