采用无机酸化增透技术的煤结构损伤及应用Coal structural damage and application using inorganic acidification anti-reflection technology
牛芸芸;杨晓国;张亮;郝军;
摘要(Abstract)：
为解决低渗透性煤层瓦斯抽采较难的问题，提出无机酸化的方法增加煤层渗透性.运用单轴压缩力学实验探究单一无机酸液（盐酸）与复合无机酸液（盐酸/氢氟酸）处理煤体的力学损伤特征，利用扫描电镜实验分析无机酸化煤体的表面微观形貌，揭示无机酸化增透煤岩微观结构损伤机理，并在陕西黄陵煤矿应用.研究结果表明：复合无机酸液侵入煤体内部的孔裂隙中破坏结构，降低煤体力学强度，同时溶蚀孔隙内矿物质成分，达到扩孔效果，证明酸化对破坏煤体结构具有积极作用，可促进吸附煤层气的解吸行为.经复合无机酸化增透后，压裂孔瓦斯抽采量提高20%以上.研究结论可为无机酸化增透技术提供理论依据.
关键词(KeyWords)： 低渗煤层;无机酸化;压裂增透;损伤机理;瓦斯抽采
基金项目(Foundation): 国家自然科学基金（51704186）
作者(Authors): 牛芸芸;杨晓国;张亮;郝军;
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