{"title":"Fracture Mechanism on Supercritical Carbon Dioxide Blasting in Low-Permeability Coal Under Various Crustal Stresses","authors":"Liwei Xin","doi":"10.1166/nnl.2020.3156","DOIUrl":null,"url":null,"abstract":"The low permeability of coalbed inhabits exploring coalbed methane (CBM) in China. In order to enhance CBM production, supercritical carbon dioxide (SC-CO2) blasting is used as an efficient and promising method. In the paper, the experiments of SC-CO2 blasting\n were performed for coal and concrete specimens in the large size (1 m × 1 m × 0.5 m) under different crustal stresses, and then the fracture mechanism was analyzed. The results show that Crushing zone, rupture zone, and vibration zone were formed in sequence around the blasting\n hole, which provide the experimental and theoretical foundation for the field blasting.","PeriodicalId":18871,"journal":{"name":"Nanoscience and Nanotechnology Letters","volume":"12 1","pages":"570-574"},"PeriodicalIF":0.0000,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanoscience and Nanotechnology Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1166/nnl.2020.3156","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
The low permeability of coalbed inhabits exploring coalbed methane (CBM) in China. In order to enhance CBM production, supercritical carbon dioxide (SC-CO2) blasting is used as an efficient and promising method. In the paper, the experiments of SC-CO2 blasting
were performed for coal and concrete specimens in the large size (1 m × 1 m × 0.5 m) under different crustal stresses, and then the fracture mechanism was analyzed. The results show that Crushing zone, rupture zone, and vibration zone were formed in sequence around the blasting
hole, which provide the experimental and theoretical foundation for the field blasting.
煤层气低渗透是中国煤层气勘探的难点。为了提高煤层气产量，采用超临界二氧化碳爆破是一种有效且有发展前景的方法。本文对大尺寸(1 m × 1 m × 0.5 m)煤和混凝土试件在不同地应力条件下进行了SC-CO2爆破试验，并对其破裂机理进行了分析。结果表明:爆破孔周围依次形成破碎区、破裂区和振动区，为现场爆破提供了实验和理论依据。
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