Na Zhang, Yu Song, Yuxin Ren, Piaopiao Zhang, Ziyun Zhang, Shuaidong Wang
{"title":"砂岩高温处理后劣化机理的多尺度实验研究","authors":"Na Zhang, Yu Song, Yuxin Ren, Piaopiao Zhang, Ziyun Zhang, Shuaidong Wang","doi":"10.1615/jpormedia.2024052733","DOIUrl":null,"url":null,"abstract":"ABSTRACT: A significant aspect influencing engineering stability in deep engineering is temperature. In order to explore the influence of high temperature on sandstone, This study used experimental samples of sandstone from Shaanxi, China. Sandstone samples were subjected to varying temperature gradients (25℃, 100℃, 300℃, 500℃ and 700℃) for Uniaxial Compressive Strength (UCS), Acoustic Emission (AE) monitoring, and Nuclear Magnetic Resonance (NMR) experiments. The resulting mechanical parameters and pore diameter distributions of the sandstone under various temperatures were compared and analyzed. The results showed that: Peak strain and peak stress of sandstone samples both greatly rise and decrease with increasing heating temperature. The degree of elastic modulus and peak stress degradation is also more pronounced at higher temperatures. The brittle-ductile transition occurs at about occurs between 500°C~700°C. At temperatures between 25°C and 500°C, the peak AE energy occurs near the peak strength of the sandstone. The ringing counts of the sandstone specimens reached a maximum after the peak stress when the temperature was 700°C, and the peak AE energy gradually decreased at higher heating temperatures. The T2 spectrum curve and pore size curve of the sandstone increased and gradually shifted to the right with the increase of the treatment temperature, and the area of the T2 spectrum and porosity also gradually increased. There is a negative correlation between porosity and total area of T2 spectrum and peak stress and elastic modulus of sandstone under high temperature. The micropores showed a monotonically decreasing trend with increasing temperature","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Multi‑scale Experimental Investigations on the Deterioration Mechanism of Sandstone after high-temperature treatment\",\"authors\":\"Na Zhang, Yu Song, Yuxin Ren, Piaopiao Zhang, Ziyun Zhang, Shuaidong Wang\",\"doi\":\"10.1615/jpormedia.2024052733\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"ABSTRACT: A significant aspect influencing engineering stability in deep engineering is temperature. In order to explore the influence of high temperature on sandstone, This study used experimental samples of sandstone from Shaanxi, China. Sandstone samples were subjected to varying temperature gradients (25℃, 100℃, 300℃, 500℃ and 700℃) for Uniaxial Compressive Strength (UCS), Acoustic Emission (AE) monitoring, and Nuclear Magnetic Resonance (NMR) experiments. The resulting mechanical parameters and pore diameter distributions of the sandstone under various temperatures were compared and analyzed. The results showed that: Peak strain and peak stress of sandstone samples both greatly rise and decrease with increasing heating temperature. The degree of elastic modulus and peak stress degradation is also more pronounced at higher temperatures. The brittle-ductile transition occurs at about occurs between 500°C~700°C. At temperatures between 25°C and 500°C, the peak AE energy occurs near the peak strength of the sandstone. The ringing counts of the sandstone specimens reached a maximum after the peak stress when the temperature was 700°C, and the peak AE energy gradually decreased at higher heating temperatures. The T2 spectrum curve and pore size curve of the sandstone increased and gradually shifted to the right with the increase of the treatment temperature, and the area of the T2 spectrum and porosity also gradually increased. There is a negative correlation between porosity and total area of T2 spectrum and peak stress and elastic modulus of sandstone under high temperature. The micropores showed a monotonically decreasing trend with increasing temperature\",\"PeriodicalId\":50082,\"journal\":{\"name\":\"Journal of Porous Media\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Porous Media\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1615/jpormedia.2024052733\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Porous Media","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1615/jpormedia.2024052733","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Multi‑scale Experimental Investigations on the Deterioration Mechanism of Sandstone after high-temperature treatment
ABSTRACT: A significant aspect influencing engineering stability in deep engineering is temperature. In order to explore the influence of high temperature on sandstone, This study used experimental samples of sandstone from Shaanxi, China. Sandstone samples were subjected to varying temperature gradients (25℃, 100℃, 300℃, 500℃ and 700℃) for Uniaxial Compressive Strength (UCS), Acoustic Emission (AE) monitoring, and Nuclear Magnetic Resonance (NMR) experiments. The resulting mechanical parameters and pore diameter distributions of the sandstone under various temperatures were compared and analyzed. The results showed that: Peak strain and peak stress of sandstone samples both greatly rise and decrease with increasing heating temperature. The degree of elastic modulus and peak stress degradation is also more pronounced at higher temperatures. The brittle-ductile transition occurs at about occurs between 500°C~700°C. At temperatures between 25°C and 500°C, the peak AE energy occurs near the peak strength of the sandstone. The ringing counts of the sandstone specimens reached a maximum after the peak stress when the temperature was 700°C, and the peak AE energy gradually decreased at higher heating temperatures. The T2 spectrum curve and pore size curve of the sandstone increased and gradually shifted to the right with the increase of the treatment temperature, and the area of the T2 spectrum and porosity also gradually increased. There is a negative correlation between porosity and total area of T2 spectrum and peak stress and elastic modulus of sandstone under high temperature. The micropores showed a monotonically decreasing trend with increasing temperature
期刊介绍:
The Journal of Porous Media publishes original full-length research articles (and technical notes) in a wide variety of areas related to porous media studies, such as mathematical modeling, numerical and experimental techniques, industrial and environmental heat and mass transfer, conduction, convection, radiation, particle transport and capillary effects, reactive flows, deformable porous media, biomedical applications, and mechanics of the porous substrate. Emphasis will be given to manuscripts that present novel findings pertinent to these areas. The journal will also consider publication of state-of-the-art reviews. Manuscripts applying known methods to previously solved problems or providing results in the absence of scientific motivation or application will not be accepted. Submitted articles should contribute to the understanding of specific scientific problems or to solution techniques that are useful in applications. Papers that link theory with computational practice to provide insight into the processes are welcome.