| 工作面漏风对采空区瓦斯流动规律影响的数值模拟 |
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| 引用本文： | 高魁,刘泽功,刘健,康亚,黄凯峰.工作面漏风对采空区瓦斯流动规律影响的数值模拟[J].煤矿安全,2012,43(7):8-11. |
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| 作者姓名： | 高魁 刘泽功 刘健 康亚 黄凯峰 |
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| 作者单位： | 安徽理工大学能源与安全学院,安徽淮南232001 安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 |
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| 基金项目： | 国家自然科学基金资助项目,安徽省教育厅自然科学基金重点资助项目,安徽省优秀青年人才基金资助项目 |
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| 摘 要： | 为了描述工作面漏风对采空区瓦斯流动规律的影响,建立了采空区瓦斯流动的渗流-扩散模型,利用COMSOL Multiphysics数值模拟软件对采空区瓦斯流动规律进行了模拟求解。模拟结果显示,在漏风的影响下,采空区中瓦斯浓度从漏风口处开始降低;随着时间的发展,进风侧的瓦斯逐渐开始向回风侧运移,从进风侧开始逐步形成"扇形"浓度降低区;瓦斯从回风侧流入到回风巷中,使工作面上隅角附近瓦斯浓度异常升高;漏风对采空区瓦斯移动的影响范围有限,靠近回风侧边缘的采空区瓦斯浓度很高为瓦斯浓度富集区。
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| 关 键 词： | 工作面 采空区 漏风 瓦斯流动 数值模拟 COMSOL Multiphysics |
Numerical Simulation of the Influence of Working Face Air Leakage on Gob Gas Flow Laws |
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| Abstract: | In order to describe the influence of working face air leakage on gob gas flow laws,a seepage-diffusion model is built and a simulation solution of gob gas flow laws are obtained by using COMSOL Multiphysics numerical simulation software.Simulation results show that,under the impact of air leakage,the gas concentration begins to decrease from the air leak place;gas in the air inlet side moves gradually to the air return side as time goes on,thus a concentration decreasing sector region is formed gradually from air inlet side;gas from the air return side moves to the return airway and makes the gas concentration of the workface corner increase abnormally;the impact of air leakage upon gob gas movement is limited,the gob near the air return side has a rather high gas concentration and makes it a gas enrichment region. |
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| Keywords: | working face gob air leakage gas flow numerical simulation COMSOL Muhiphysics |
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