{"title":"co2 - h2o -煤相互作用温度影响下热增透效应与化学增透效应的竞争机制","authors":"Yu Shi, Baiquan Lin, Ting Liu, Tao Huang","doi":"10.1007/s12665-025-12603-8","DOIUrl":null,"url":null,"abstract":"<div><p>Utilizing the thermal and chemical permeability enhancement effects of hot flue gas can effectively improve the gas permeability of deep coal seams. However, the competitive permeability enhancement mechanism between thermal and chemical effects caused by temperature changes in the CO<sub>2</sub>-H<sub>2</sub>O-coal interaction remains unclear, and the theoretical model that can capture the permeability changes induced by the coupled thermal and chemical effects has rarely been mentioned. Therefore, it is of great significance to explore the influence of the coupled thermal and chemical effects on coal permeability and further establish an appropriate permeability model for gas production capacity forecast. In this paper, the reaction solution pH, soluble mineral content, and coal permeability under different treating temperatures were first tested and analyzed based on a self-built CO<sub>2</sub>-H<sub>2</sub>O-coal interaction platform. Subsequently, a permeability model considering the coupling of thermal effects (thermal damage, thermal expansion, and dissolution weakening) and chemical effects (mineral dissolution, inward expansion of matrix strengthening, and fracture modulus degradation) was established and matched with experimental data. Finally, the magnitude of permeability enhancement resulting from thermal and chemical effects was quantitatively analyzed based on the verified permeability model. The research can provide theoretical guidance for the application of hot flue gas to enhance permeability in deep coal seams.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Competitive mechanisms of thermal and chemical permeability enhancement effects under the influence of CO2-H2O-coal interaction temperature\",\"authors\":\"Yu Shi, Baiquan Lin, Ting Liu, Tao Huang\",\"doi\":\"10.1007/s12665-025-12603-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Utilizing the thermal and chemical permeability enhancement effects of hot flue gas can effectively improve the gas permeability of deep coal seams. However, the competitive permeability enhancement mechanism between thermal and chemical effects caused by temperature changes in the CO<sub>2</sub>-H<sub>2</sub>O-coal interaction remains unclear, and the theoretical model that can capture the permeability changes induced by the coupled thermal and chemical effects has rarely been mentioned. Therefore, it is of great significance to explore the influence of the coupled thermal and chemical effects on coal permeability and further establish an appropriate permeability model for gas production capacity forecast. In this paper, the reaction solution pH, soluble mineral content, and coal permeability under different treating temperatures were first tested and analyzed based on a self-built CO<sub>2</sub>-H<sub>2</sub>O-coal interaction platform. Subsequently, a permeability model considering the coupling of thermal effects (thermal damage, thermal expansion, and dissolution weakening) and chemical effects (mineral dissolution, inward expansion of matrix strengthening, and fracture modulus degradation) was established and matched with experimental data. Finally, the magnitude of permeability enhancement resulting from thermal and chemical effects was quantitatively analyzed based on the verified permeability model. The research can provide theoretical guidance for the application of hot flue gas to enhance permeability in deep coal seams.</p></div>\",\"PeriodicalId\":542,\"journal\":{\"name\":\"Environmental Earth Sciences\",\"volume\":\"84 20\",\"pages\":\"\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Earth Sciences\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12665-025-12603-8\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Earth Sciences","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s12665-025-12603-8","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Competitive mechanisms of thermal and chemical permeability enhancement effects under the influence of CO2-H2O-coal interaction temperature
Utilizing the thermal and chemical permeability enhancement effects of hot flue gas can effectively improve the gas permeability of deep coal seams. However, the competitive permeability enhancement mechanism between thermal and chemical effects caused by temperature changes in the CO2-H2O-coal interaction remains unclear, and the theoretical model that can capture the permeability changes induced by the coupled thermal and chemical effects has rarely been mentioned. Therefore, it is of great significance to explore the influence of the coupled thermal and chemical effects on coal permeability and further establish an appropriate permeability model for gas production capacity forecast. In this paper, the reaction solution pH, soluble mineral content, and coal permeability under different treating temperatures were first tested and analyzed based on a self-built CO2-H2O-coal interaction platform. Subsequently, a permeability model considering the coupling of thermal effects (thermal damage, thermal expansion, and dissolution weakening) and chemical effects (mineral dissolution, inward expansion of matrix strengthening, and fracture modulus degradation) was established and matched with experimental data. Finally, the magnitude of permeability enhancement resulting from thermal and chemical effects was quantitatively analyzed based on the verified permeability model. The research can provide theoretical guidance for the application of hot flue gas to enhance permeability in deep coal seams.
期刊介绍：
Environmental Earth Sciences is an international multidisciplinary journal concerned with all aspects of interaction between humans, natural resources, ecosystems, special climates or unique geographic zones, and the earth:
Water and soil contamination caused by waste management and disposal practices
Environmental problems associated with transportation by land, air, or water
Geological processes that may impact biosystems or humans
Man-made or naturally occurring geological or hydrological hazards
Environmental problems associated with the recovery of materials from the earth
Environmental problems caused by extraction of minerals, coal, and ores, as well as oil and gas, water and alternative energy sources
Environmental impacts of exploration and recultivation – Environmental impacts of hazardous materials
Management of environmental data and information in data banks and information systems
Dissemination of knowledge on techniques, methods, approaches and experiences to improve and remediate the environment
In pursuit of these topics, the geoscientific disciplines are invited to contribute their knowledge and experience. Major disciplines include: hydrogeology, hydrochemistry, geochemistry, geophysics, engineering geology, remediation science, natural resources management, environmental climatology and biota, environmental geography, soil science and geomicrobiology.
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