| 现场测定煤层透气性系数计算方法的优化研究 |
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| 引用本文： | 王志亮,杨仁树.现场测定煤层透气性系数计算方法的优化研究[J].中国安全科学学报,2011,21(3). |
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| 作者姓名： | 王志亮 杨仁树 |
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| 作者单位： | 1. 中国矿业大学(北京)力学与建筑工程学院,北京100083;华北科技学院安全工程学院,北京101601
2. 中国矿业大学(北京)力学与建筑工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金重点项目 |
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| 摘 要： | 为深入分析瓦斯在煤层内流动的阻力特性,根据煤层瓦斯径向不稳定流动理论,探讨煤层透气性系数的本质内涵及物理意义,指出其现场应用过程中存在的不足。基于无因次流量准数Y和时间准数F0之间的关系,对系数a,b值进行修正,提出透气性系数公式的优化计算方法。给出对比2种计算方法的现场应用实例。结果表明,优化方法的计算过程不必采用试算,计算结果的相对误差小于2%,可满足现场应用的实际要求。依据现场测定值可计算出AB的区间范围,据此可直接选择相应公式计算煤层透气性系数。
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| 关 键 词： | 透气性系数 径向流动 计算方法 优化 现场应用 |
Optimization Study on Calculation Method on Coal Seam Gas Permeability Coefficient in Locale Measurement |
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| WANG Zhi-liang,YANG Ren-shu.Optimization Study on Calculation Method on Coal Seam Gas Permeability Coefficient in Locale Measurement[J].China Safety Science Journal,2011,21(3). |
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| Authors: | WANG Zhi-liang YANG Ren-shu |
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| Affiliation: | WANG Zhi-liang1,2 YANG Ren-shu1(1 School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing 100083,China 2 Safety Engineering College,North China Institute of Science and Technology,Beijing 101601,China) |
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| Abstract: | The resistance characteristics of gas flowing in coal bed were analyzed thoroughly according to the theory of gas radial unstable flow,the hypostasis meanings and calculation method were discussed,and the deficiency was pointed out in locale application.Basing on the connection of dimensionless flow criterion Y and time criterion F0,coefficient a and b were modified and a straightforward calculation method of gas permeability coefficient was put forward.The new method was applied to locale and contrasted wi... |
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| Keywords: | gas permeability coefficient radial flow calculation method optimization locale application |
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