关于不同温度下煤炭储机械参数和透性的研究
Qi Qi1,2, Xuehai Fu1,2, Junqiang Kang1,2
1Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China.
ACS omega
|August 5, 2024
概括
深层煤炭储库经历更高的温度和压力,影响机械性能和透性. 这项研究开发了一个模型,预测由温度,机械参数和有效应力影响的煤炭透性.
科学领域:
- 地质工程是地质工程.
- 岩石机械学 岩石机械学
- 储水库工程 储水库工程
背景情况:
- 由于温度和压力升高,深层煤矿储藏带来了独特的挑战.
- 了解这些条件对煤炭机械性能和透性的影响,对于资源开采至关重要.
- 现有的研究不足以解决温度和有效应力对煤炭透性的综合影响.
研究的目的:
- 研究温度对深层低级煤的机械参数和透性的影响.
- 开发煤炭透性的预测模型,包括温度,机械性能和有效应力.
- 为优化深层煤矿库中压裂和煤床甲生产提供见解.
主要方法:
- 在不同深度,有效应力和温度 (2080°C) 下,对来自格尔盆地的煤柱样本进行了透和机械实验.
- 在不同的热和应力条件下分析了弹性模量,波桑比率和透率的变化.
- 开发了一种透性预测模型,该模型基于温度和有效应力对断裂压缩性系数进行分叉.
主要成果:
- 弹性模量下降了31.0%,Poisson比率增加了72.0%,随着温度从20°C上升到80°C.
- 透性随着深度的增加而显著下降 (48.3790.12%).
- 开发的模型显示预测误差为12.7% (恒定有效应力) 和17.2% (不同条件).
结论:
- 温度显著改变了机械性能,并降低了深层煤的透性.
- 开发的透性预测模型有效地整合了温度和有效应力,提供了更好的准确性.
- 这些发现为改善深层煤层中煤床甲提取策略提供了宝贵的指导.
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