Research on the Mechanism and Capacity of CO₂ Stored in Abandoned Coal Mine Gob

Abstract:

To explore new pathways of CO₂ geological storage, the mechanism of CO₂ stored in abandoned coal mine gob was analyzed through the investigation of the gobs exploitation current situation. Methods to calculate the capacity to store CO₂ was proposed based on establishing mathematical model. This paper presented suggestions about how to carry out research in the future. Research suggests that after the coal mine is abandoned, there are large underground spaces consisting of rock cavities of gob caving zone, rock fissures of fractured zone, and permanent residual laneways, which CO₂ can be stored, and there will be tremendous sequestration potential. Compared with deep aquifers storage, the space has the advantages of larger scale porosity, simpler storage mechanism, easier injection, more abundant geological data, etc. At the same time, the space also remains problems such as lower seal strength and failure of overburden strata easily causing CO₂ leaks, etc. This paper suggests that six aspects should be further researched in the future.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 196-200
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.196
• Online since: February 2014
• Authors: Xing Wu Hou, Ding Guo Huang*, Hang Zheng Li, Hai Feng Chen, Xuan Peng
• Keywords: Abandoned Coal Mine, Capacity, CO₂ Storage, Mechanism

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