王辰^1,,
冯增朝^1,,,
周动²,
赵东²,
蔡婷婷¹
1. 太原理工大学, 原位改性采矿教育部重点实验室, 太原 030024
2. 太原理工大学安全与应急管理工程学院, 太原 030024

基金项目: 国家自然科学基金（21373146）和青年三晋****计划专项经费联合资助


详细信息

作者简介: 王辰, 男, 1992年生, 博士研究生, 主要从事煤层气开采研究.E-mail:wangchen_tyut@163.com

通讯作者: 冯增朝, 男, 1971年生, 教授, 博士生导师, 主要从事岩石力学和煤层气开采的研究工作.E-mail:zc-feng@163.com

中图分类号: P631

收稿日期:2018-06-05
修回日期:2019-07-15
上线日期:2019-09-05

Study on fractal characteristics of coalbed gas occurrence

WANG Chen^1,,
FENG ZengChao^1,,,
ZHOU Dong²,
ZHAO Dong²,
CAI TingTing¹
1. Key Laboratory of Insitu Property improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
2. Faculty of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China


More Information

Corresponding author: FENG ZengChao,E-mail:zc-feng@163.com

MSC: P631

--> Received Date: 05 June 2018
Revised Date: 15 July 2019
Available Online: 05 September 2019


摘要
摘要:本文利用红外热成像手段，对微小煤样内的甲烷吸附区进行了观察，并评估其吸附特征与在煤中的分布规律.研究表明煤中存在不同尺度与甲烷吸附能力的甲烷富集区，吸附/解吸甲烷时，甲烷富集区比邻近区域具有更明显的升温/降温现象.通过图像处理的方法对不同吸附压力条件下的红外热像图中的甲烷富集区进行提取，采用盒维数进行统计发现甲烷富集区符合分形规律.试验表明随着吸附压力升高，甲烷富集区的分形维数增大，分布初值减小.对两个不同煤田的煤层气富集区进行统计表明：从微米级到千米级尺度范围内，甲烷富集区分布具有分形特征，且分形维数均在1.5~2.00之间.
关键词: 煤层气富集区/
分形维数/
吸附热/
温度/
红外热像仪

Abstract:The adsorption area of methane in micro coal samples is observed by infrared thermography, and its adsorption characteristics and distribution in coal were evaluated. The results show that different scale methane enrichment area exists in coal. Methane enrichment area has more obvious warming/cooling phenomenon than adjacent area, When methane is adsorbed/desorbed. The heat-imaging of coal adsorbed methane is processed. The relationship between the scale and number of methane enrichment area and is calculated by box counting dimension. It is found that the methane enrichment region conforms to the fractal law. The experimental results show that with the increase of adsorption pressure, the fractal dimension of methane enrichment area increases and the initial value of distribution decreases. The distribution of Coal Bed Methane (CBM) content in two different coalfields is statistically analyzed. The results show that:from the micron to kilometre scale, the distribution of methane rich regions is fractal, and the fractal dimension is between 1.5~2.00.
Key words:Coal Bed Methane (CBM) enrichment area/
Fractal dimension/
Adsorption heat/
Temperature/
Infrared thermal imager



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