煤变形产气的力化学机理探讨

发布时间：2018-07-10 08:25

本文选题：煤 + 变形变质作用　；参考：《煤炭学报》2017年04期

【摘要】：煤与瓦斯突出过程中超量煤层气的产生一直是煤地质学界十分关注的重要问题。通过对近年来国内有关煤的次高温高压实验以及热解实验进行系统地调研,结合力化学研究成果,提出新的认识。研究表明在应力的作用下煤的化学结构会发生变化,侧链和官能团脱落,从而产生气体,对比前人的研究成果发现相同煤级的煤在变形实验和热解实验中会产生不同的气体。力化学研究指出,力的作用不仅可以破坏高分子聚合物的结构,使之产生降解,还可以改变化学反应的途径产生新的物质。因此认为,煤的次高温高压变形实验与煤的热解实验,相同煤级的煤在两个实验下产生的气体不同,可能是由于不同化学键对力和热的敏感程度不同,力的作用改变了化学反应的途径所致。
[Abstract]:The generation of excess coalbed methane in the process of coal and gas outburst has been an important issue of great concern in the field of coal geology. Through the systematic investigation and research on the sub-high temperature and high pressure experiments and pyrolysis experiments of coal in China in recent years, a new understanding is put forward. The results show that the chemical structure of coal will change under the action of stress, and the side chain and functional group will fall off, thus producing gas. Compared with the previous research results, it is found that different gases will be produced in the deformation experiment and pyrolysis experiment of coal of the same rank. The study of mechanical chemistry indicates that the action of force can not only destroy the structure of polymer and make it degrade, but also change the way of chemical reaction to produce new substances. Therefore, it is considered that the secondary high temperature and high pressure deformation experiment of coal and the pyrolysis experiment of coal may be due to the different sensitivity of different chemical bonds to the force and heat, and the gas produced by the same coal rank in the two experiments is different. The action of force changes the pathway of chemical reaction.
【作者单位】：中国科学院计算地球动力学重点实验室;中国科学院大学地球科学学院;中国科学院地质与地球物理研究所;
【基金】：国家重点研发计划资助项目(2016YFC0600401) 国家自然科学基金重点资助项目(41030422)
【分类号】：TD841

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