| 声场促进煤层气渗流的应力-温度-渗流压力场的流固动态耦合模型 |
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| 引用本文： | 易俊,姜永东,鲜学福,罗云,张瑜.声场促进煤层气渗流的应力-温度-渗流压力场的流固动态耦合模型[J].岩土力学,2009,30(10):2945-2949. |
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| 作者姓名： | 易俊 姜永东 鲜学福 罗云 张瑜 |
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| 作者单位： | 1.重庆科技学院，重庆 401331；2.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 400041 |
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| 基金项目： | 重庆市院士基金专项，中国博士后科学基金 |
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| 摘 要： | 从煤层气单相流动的吸附平衡质量守恒、声场作用下的热平衡及应力平衡等方面入手，建立了声场作用下煤层气流动的应力-温度-渗流压力场流固动态耦合数学模型。利用数值模拟，分析了声场促进煤层中甲烷解吸-扩散-渗流的机制。分析得出，声场作用可明显地提高煤-气系统的温度，提高煤层的孔隙度，增大煤层气流动的渗透率，降低煤层骨架的应力；超声在煤层中衰减形成热效应和超声振动，超声振动影响范围与超声衰减距离一致，超声热效应向煤层纵深传播，转化为煤-气层系统的热能，提高系统的温度。
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| 关 键 词： | 煤层气 声场 应力场 温度场 渗流压力场 动态耦合模型 数值模拟 |
| 收稿时间： | 2008-05-27 |
A liquid-solid dynamic coupling modelof ultrasound enhanced coalbed gas desorption and flow |
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| YI Jun,JIANG Yong-dong,XUAN Xue-fu,LUO Yun,ZHANG Yu.A liquid-solid dynamic coupling modelof ultrasound enhanced coalbed gas desorption and flow[J].Rock and Soil Mechanics,2009,30(10):2945-2949. |
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| Authors: | YI Jun JIANG Yong-dong XUAN Xue-fu LUO Yun ZHANG Yu |
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| Institution: | 1. Chongqing University of Science & Technology, Chongqing 401331, China; 2. Key Laboratory of Exploitation of Southwest Resources & Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, China |
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| Abstract: | Using the adsorption equation of coalbed gas desorption, the heat energy equation and the stress equation of coal framework when taking ultrasound into consideration, a liquid-solid dynamic coupling numerical modeling of ultrasound enhanced coalbed gas desorption and flow including stress, temperature and pressure fields is presented; the desorbing-diffusing- flowing mechanism of methane on coal beds by numerical simulating is discussed. The results show that the ultrasound field enhances temperature of the system of coal and gas, increases porosity and penetratability, depresses stress of coalbed. Moreover, ultrasound attenuation forms vibrating and heating; the spread distance of vibrating equal to ultrasound attenuating, another, the bound of ultrasound heating effecting the deep distance in coalbed. |
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| Keywords: | coalbed gas ultrasound field stress field temperature field penetrating pressure field dynamic coupling modeling numerical simulation |
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