| 采空区渗透率对瓦斯运移影响的模拟研究 |
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| 引用本文： | 高建良,刘佳佳,张学博. 采空区渗透率对瓦斯运移影响的模拟研究[J]. 中国安全科学学报, 2010, 20(9) |
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| 作者姓名： | 高建良 刘佳佳 张学博 |
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| 作者单位： | 河南理工大学安全科学与工程学院;河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地; |
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| 基金项目： | 高等学校博士学科点博导类专项科研基金，河南理工大学学位论文创新基金 |
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| 摘 要： | 根据计算流体力学基本理论,利用Fluent软件,对采空区渗透率为均匀分布、分段均匀分布、连续分布、"O"型连续分布4种不同分布情况下采空区瓦斯运移规律进行数值模拟。当渗透率均匀分布时采空区漏风较少,高浓度瓦斯分布靠近工作面;当渗透率分段均匀分布时,在采空区中有2条跳跃的瓦斯沟壑;当渗透率连续分布时,采空区漏风较多,高浓度瓦斯分布靠近采空区深部;当渗透率"O"型连续分布时,采空区漏风最多。结果表明,当渗透率不同分布情况下采空区漏风和瓦斯分布有很大差别。因此,为了得到更符合现场实际情况的瓦斯运移规律,在模拟采空区瓦斯运移规律时需要描述更能如实反映采空区煤岩冒落规律的渗透率分布。
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| 关 键 词： | 渗透率 数值模拟 漏风量 采空区 煤岩 冒落规律 |
Simulation Study on the Influence of Permeability on Gas Migration in Gob |
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| GAO Jian-liang,LIU Jia-jia,ZHANG Xue-bo. Simulation Study on the Influence of Permeability on Gas Migration in Gob[J]. China Safety Science Journal, 2010, 20(9) |
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| Authors: | GAO Jian-liang LIU Jia-jia ZHANG Xue-bo |
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| Affiliation: | GAO Jian-liang 1,2,Prof.LIU Jia-jia 1 ZHANG Xue-bo 1 (1 School of Safety Science & Engineering,Henan Polytechnic University,Jiaozuo 454003,China 2 State Key Lab Cultivation Base,Henan Province Key Lab of Gas Geology & Gas Control,China) |
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| Abstract: | According to CFD basic theories,numerical simulations on gas migration in gob are respectively conducted by using Fluent software under different distributions of gob permeability,such as uniform distribution,segmented uniform distribution,continuous distribution and O-typed continuous distribution.When the permeability is evenly distributed,the air leakage in goaf is less and high-concentration methane distributions are near the face.When the permeability is piecewise evenly distributed,there have two boun... |
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| Keywords: | permeability numerical simulation amount of air leakage gob coal and rock caving law |
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