| 型煤试件在应力场中的瓦斯渗流特性分析 |
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| 引用本文： | 黄启翔,尹光志,姜永东,易俊.型煤试件在应力场中的瓦斯渗流特性分析[J].重庆大学学报(自然科学版),2008,31(12):1436-1440. |
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| 作者姓名： | 黄启翔 尹光志 姜永东 易俊 |
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| 作者单位： | 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室;重庆科技学院安全工程学院; |
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| 基金项目： | 国家自然科学基金重点资助项目
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| 摘 要： | 应用实验室自行研制的瓦斯渗流实验装置,通过保持轴向压力不变而改变围压和保持围压不变而改变轴向压力2种加载方式,对型煤试件的瓦斯渗透特性进行了实验研究.通过对实验结果的分析,认为试件的渗透率与其所受的应力状态有密切的关系,随各种应力的增加渗透率降低,围压对试件渗透率的影响比轴向压力大,试件渗透率与各种应力成负指数关系.根据达西定律,结合实验研究结果,推导出煤层瓦斯渗流方程,该方程能够模拟采场周围煤层瓦斯的渗流,对于利用采动应力场提高瓦斯的抽放效率具有现实指导意义.
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| 关 键 词： | 应力场 瓦斯 渗流 |
Gas seepage characteristics of briquette samples in a stress field |
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| HUANG Qi-xiang,YIN Guang-zhi,JIANG Yong-dong,YI Jun.Gas seepage characteristics of briquette samples in a stress field[J].Journal of Chongqing University(Natural Science Edition),2008,31(12):1436-1440. |
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| Authors: | HUANG Qi-xiang YIN Guang-zhi JIANG Yong-dong YI Jun |
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| Institution: | HUANG Qi-xiang1,YIN Guang-zhi1,JIANG Yong-dong1,YI Jun1,2(1.The Key Laboratory of the Exploitation of Southwest Resources , the Environmental Disaster Control Engineering,Ministry of Education,Chongqing University,Chongqing 400030,P.R.China,2.College of Safety Engineering,Chongqing University of Science , Technology,Chongqing 400020,P.R.China) |
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| Abstract: | A new apparatus was constructed to investigate the impact of various loading conditions on the permeability of coal specimens.Test results show that loading condition has a definite influence on the permeability of coal specimens.Higher pressures lead to lower permeability,and it seems that the confining pressure has a greater effect than the axial stress does,while the permeability is related exponentially to applied stresses.Based on the experimental results,an equation governing gas seeping through coal ... |
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| Keywords: | stress field gas seepage |
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