کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7045875 | 1457096 | 2018 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Real-time permeability evolution of thermally cracked granite at triaxial stresses
ترجمه فارسی عنوان
تکامل نفوذپذیری در زمان واقعی گرانیت گرماده شده در تنشهای سه بعدی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Permeability of Luhui granite with 200â¯mm in diameter and 400â¯mm long was measured at triaxial stresses and elevated temperature using 600â¯Â°C 20â¯MN servo-controlled triaxial rock mechanics testing machine. It is found that 300â¯Â°C is the threshold temperature (Tc) of permeability change with temperature in thermally cracked granite. The magnitude of permeability is 10â7â¯D with a low increase below Tc and the permeability whose magnitude is 10â6â¯D increases drastically with high amplitude at 300-400â¯Â°C while the magnitude is 10â5â¯D at 400â¯Â°C. Simultaneously, the change of micro-crack quantity in thermally cracked Luhui granite at temperature up to 400â¯Â°C was quantificationally investigated by MPV micro-photometer. Two peaks of micro-crack quantity that the length is more than 5â¯Î¼m and 10â¯Î¼m respectively exist at temperature up to 400â¯Â°C. The temperature scope where micro-crack quantity peak appears in length >5â¯Î¼m is less than that in length >10â¯Î¼m. The quantity of micro-crack whose length is >10â¯Î¼m increases sharply at the rate of one per ten centigrade at temperature above 300â¯Â°C. The drastic increase of micro crack above 300â¯Â°C is the main reason that permeability increases sharply at temperature above 300â¯Â°C in thermally cracked granite. Compared with preheated results, thermal and mechanical coupled effect can more heavily affect granite permeability than only thermal effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 133, 25 March 2018, Pages 194-200
Journal: Applied Thermal Engineering - Volume 133, 25 March 2018, Pages 194-200
نویسندگان
Zijun Feng, Yangsheng Zhao, Yuan Zhang, Zhijun Wan,