| 基于吸附动力学理论分析水分对煤体吸附特性的影响 |
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| 引用本文： | 赵东,冯增朝,赵阳升.基于吸附动力学理论分析水分对煤体吸附特性的影响[J].煤炭学报,2014,39(3):518-523. |
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| 作者姓名： | 赵东 冯增朝 赵阳升 |
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| 作者单位： | 1.太原理工大学 矿业工程学院，山西 太原 030024；;
2.太原理工大学 采矿工艺研究所，山西 太原 030024 |
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| 基金项目： | 国家自然科学基金资助项目(51304142，21373146)；山西省基础研究计划资助项目(2013021029-3) |
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| 摘 要： | 为了研究块裂煤体在不同储水状态下的吸附特性差异,选用潞安余吾煤矿的贫煤和阳煤开元煤矿的无烟煤并加工成Φ100 mm×150 mm的大块圆柱体煤样,保留了煤体原有的裂隙,基于吸附动力学理论,采用自主研制的吸附-注水成套实验系统,针对两煤种设计了6种不同含水率下的瓦斯吸附特性实验,并对同等初始条件下的定容吸附速率进行了研究。结果表明:水分作用下,对于相同初始压力下的定容吸附,1号和2号煤样干燥时的吸附速率分别是饱和含水时的16倍和22倍,吸附量分别是饱和含水时的5倍和32倍,通过孔隙测定结果,证实1号煤样具有更为发育的孔隙裂隙通道;关于终态吸附量随含水率的增加而降低的趋势,1号煤样是非线性的,但2号煤样呈现较好的线性衰减。
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| 关 键 词： | 块裂煤体 吸附特征 水分 吸附动力学理论 煤层气开采 |
| 收稿时间： | 2013-09-05 |
Effects of liquid water on coalbed methane adsorption characteristicsbased on the adsorption kinetic theory |
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| Abstract: | For the purpose of various adsorption characteristics with different moisture contents of fracture coal samples，meagre coal sample from Lu’an Coal Mine and anthracite coal sample from Yangmei Kaiyuan Coal Mine were adopted and a composed of experimental system for constant volume adsorption was designed.The dimension of sample was 100 mm×150 mm and contained the original fissures and fractures of it.The experimental system of adsorption- water- injection which manufactured by own was adopted，and a series of six different moisture contents coal samples experiments were designed.The condition was at the same initial gas pressure and the adsorption room was constant.The results show that：In the constant volume adsorption，for the affection of fluid water at the same initial pressure，the adsorption velocities of No.1 and No.2 coal sample in drying state are 16 and 22 times of approximate saturation moisture content state(ASMCS) separately，the adsorption volumes of No.1 and No.2 coal sample are 5 and 32 times of ASMCS separately，due to less porous of No.2.The adsorption volume at final state，which is declined as a function of moisture contents，the law of No.2 coal sample is linear decrease but No.1 is nonlinear. |
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| Keywords: | fracture coal sample adsorption characteristics liquid water adsorption kinetic theoretical coalbed methane exploitation |
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