煤体微生物厌氧发酵对裂隙发育的响应规律

发布时间：2018-03-18 06:02

本文选题：厌氧　切入点：煤体生物发酵　出处：《煤炭学报》2017年05期 　论文类型：期刊论文

【摘要】：基于二维承载条件的煤岩变形过程中的裂隙空间空气渗流试验、梯度含氧水平的煤体微生物厌氧发酵影响试验、与不同煤体粒径的微生物发酵试验,测试了煤体比表面积、裂隙含氧量对煤体厌氧发酵的影响关系,推演了不同深度煤体裂隙发育对厌氧微生物的生物活性影响规律与关键控制因素。结果表明:空气渗流大于1%的煤体中,空气渗流导致的厌氧环境的破坏作用,是抑制煤体厌氧发酵的主控制因素,而且煤体裂隙发育越迅速,空气渗流作用越强,煤体厌氧发酵抑制受控范围越大;空气渗流小于1%的煤体中,在兼氧菌对少量渗流空气缓冲作用影响下,裂隙发育对煤体比表面积的扩大作用是促进煤体厌氧发酵的主控因素,裂隙发育越充分,煤体比表面积越大,煤体的厌氧发酵速率提升越高。
[Abstract]:Based on the two-dimensional loading condition, the air seepage test in fractured space during coal rock deformation, the anaerobic fermentation experiment of coal microorganism with gradient oxygen level, and the microbial fermentation experiment with different coal particle size, the specific surface area of coal was tested. The effect of fracture oxygen content on anaerobic fermentation of coal body is discussed. The influence law and key controlling factors of different depth of coal fracture development on biological activity of anaerobic microorganism are deduced. The results show that the air seepage is more than 1% in coal body. The destruction of anaerobic environment caused by air percolation is the main controlling factor to restrain anaerobic fermentation of coal body, and the faster the crack of coal body develops, the stronger the effect of air seepage is, and the more controlled scope of inhibition of anaerobic fermentation of coal body is. In coal body with air seepage less than 1%, under the influence of facultative bacteria on a small amount of seepage air buffer, the expansion of specific surface area of coal body by crack development is the main controlling factor to promote anaerobic fermentation of coal body. The higher the specific surface area of coal is, the higher the anaerobic fermentation rate of coal is.
【作者单位】：中国矿业大学煤炭资源与安全开采国家重点实验室;中国矿业大学安全工程学院;中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;
【基金】：江苏省青年基金资助项目(BK20140199) 中央高校基本科研基金资助项目(2014QNB41) 煤炭资源与安全开采国家重点实验室自主课题资助项目(SKLCRSM12X08)
【分类号】：TD712;TQ920.1

【相似文献】