Landfill Feasibility and Storage Model of Carbon Dioxide in Deep Coal Seam Goaf
The detrimental effects of carbon dioxide are evident,and reducing global carbon dioxide concentration has become a worldwide consensus.Existing methods for controlling carbon dioxide can be categorized into two approaches:increasing absorption and reducing emissions.While reducing emissions involves using clean energy,increasing absorption is mainly achieved through landfilling,with geological storage being the predominant method.China has numerous goafs that theoretically could serve as excellent geological landfill spaces.However,current re-search focuses on oceans,unminable coal seams,and saline aquifers,with limited studies on geo-logical storage in goafs.This paper analyzes the feasibility of geological storage in goafs from two aspects:sealing property and storage capacity.Finally,we propose storage standards and three natural storage models.A storage capacity calculation formula was derived and applied to esti-mate the carbon dioxide storage capacity of the No.6 coal seam in Maidaoshan Coal Mine as a case study.The results indicate that the No.6 coal seam could potentially store approximately 1.98 × 107 tonnes of carbon dioxide,highlighting the immense potential for carbon dioxide storage in goafs.
万方数据
维普
