摘要
将煤 /瓦斯突出过程中能量释放的热动力学过程应用于煤层中瓦斯气迁移理论的有限元分析方法中 ,提出了一种分析煤 /瓦斯突出过程的能量释放机理。通过数值分析比较煤层发生突出所必须的弹性功与煤 /瓦斯突出过程中所释放的瓦斯内能 ,发现瓦斯解吸附所释放出的能量是引起煤 /瓦斯突出的主要原因。此外 ,还进一步讨论了在等温和绝热情况下煤 /瓦斯突出过程中能量释放的机理。
A hybrid approach is presented to apply the thermodynamics process of energy release to the finite element method for analysis of gas migration in coal seams in order to explain the mechanism of gas energy release in the occurrence of coal/gas outbursts. A comparison between the elastic work to be done for outbursts to occur and the released potential energy which includes the strain energy stored in coal seams and the internal gas energy due to desorption and expansion of gas during outbursts has been carried out by numerical analysis. It has been found that the release of gas energy due to desorption of gas from the coal matrix to the pores is the major cause for the occurrence of outbursts. Further, the mechanism of energy release during outbursts has been discussed both for the isothermal and adiabatic cases.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2000年第z1期829-835,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
浙江大学曹光彪高科技发展研究基金(编号413c20202)
国家教委留学回国人员科研启动基金(编号G5990)资助项目
关键词
瓦斯迁移与溢出
煤/瓦斯突出
甲烷吸附
瓦斯内能释放与转化
等温和绝热过程
gas migration and emission
coal/gas outburst
methane desorption
gas energy release and transformation
isothermal and adiabatic process
作者简介
张我华,男,55岁,1982年获同济大学固体力学硕士学位,1992年获澳大利亚新南威尔士大学岩土工程博士、计算机科学硕士学位,在澳大利亚从事岩石力学研究多年。1998年后回国在浙江大学任外籍教授,主要从事岩土工程力学研究。
