不同冷却速率下高温煤的损伤特征

IF 3.5 2区工程技术 Q3 ENERGY & FUELS Geothermics Pub Date : 2024-10-07 DOI:10.1016/j.geothermics.2024.103179

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引用次数: 0

摘要

随着加热温度的升高，煤的内部孔隙发育和裂纹扩展加剧，破坏模式逐渐从脆性转向塑性。存在一个加速破坏的临界温度。水冷造成的快速降温会加速煤炭的损坏和裂纹。快速降温导致的热冲击因子可以定量地表示水冷所引起的破坏。研究结果有望为煤田火区的热能利用提供指导。

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Damage characteristics of high-temperature coal under different cooling rates

The damage characteristics of high-temperature coal under water cooling was analyzed.As the heating temperature increases, the internal pore development and crack propagation in coal intensify, with the failure mode gradually shifting from brittle to plastic. There exists a threshold temperature that accelerates damage. The rapid temperature drop caused by water cooling accelerates damage and cracking in the coal. The thermal shock factor resulting from the rapid temperature drop can quantitatively represent the damage induced by water cooling. The results are expected to provide guidance for the utilization of thermal energy in coal field fire areas.

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来源期刊

Geothermics 工程技术-地球科学综合

CiteScore

7.70

自引率

15.40%

发文量

237

审稿时长

4.5 months

期刊介绍： Geothermics is an international journal devoted to the research and development of geothermal energy. The International Board of Editors of Geothermics, which comprises specialists in the various aspects of geothermal resources, exploration and development, guarantees the balanced, comprehensive view of scientific and technological developments in this promising energy field. It promulgates the state of the art and science of geothermal energy, its exploration and exploitation through a regular exchange of information from all parts of the world. The journal publishes articles dealing with the theory, exploration techniques and all aspects of the utilization of geothermal resources. Geothermics serves as the scientific house, or exchange medium, through which the growing community of geothermal specialists can provide and receive information.