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在受到动态注入水影响的煤炭中,对气体脱吸定律的实验研究

Tianwei Shi¹, Aiwen Wang², Lianpeng Dai¹

¹Institute of Disaster Rock Mechanics, Liaoning University, Shenyang, 110036, China.

Scientific reports

|December 16, 2023

概括

在煤层中注入水会改变气体吸附动态,影响气体控制策略. 这项研究揭示了水的存在.

科学领域:

* 采矿工程采矿工程
* 地质技术工程 * 地质工程
* 煤炭科学煤炭科学

背景情况:

*从煤层中脱落的气体对于矿山安全和气体控制至关重要.
* 煤矿采用了液压技术和注水技术.
* 了解水对气体脱吸的影响对于优化提取和防止喷发至关重要.

研究的目的:

* 通过动态注入水来研究煤炭中气体脱氧的定律.
* 分析水浸泡,水替换和水阻塞在气体脱吸中的作用.
* 评估注水对气体吸附率和总气体释放量的影响.

主要方法:

*使用设计的煤层模拟装置进行动态注水实验.
* 在不同吸附平衡压力下对煤样品进行测试.
*对注入水煤样品 (WCS) 和非注入水煤样品 (NCS) 的气体吸附曲线分析.

主要成果:

*注入水会改变煤气脱吸率,导致WCS中的波动衰减.
*与NCS相比,WCS脱吸曲线缺乏快速增长阶段,只显示缓慢增长和停止阶段.
* 水的浸泡和替换在非湿区促进了脱吸,但在湿区抑制了它.
* WCS 的排放速度超过 NCS 的脱吸率,这表明总气体脱吸率增加.

结论:

*注入水显著影响煤层中的气体脱吸行为.
* 水的作用 (嵌合,替换,阻塞) 改变了气体释放的动态.
*这些发现对于提高天然气开采效率和减轻煤炭和天然气爆发至关重要.

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