کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
294518 511485 2011 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Variation in the temperature field of rocks overlying a high-temperature cavity during underground coal gasification
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Variation in the temperature field of rocks overlying a high-temperature cavity during underground coal gasification
چکیده انگلیسی

High temperature affects rocks in a way that changes the physical and mechanical properties of them. The temperature field in rock overlying a high temperature zone has been estimated using experimental research on thermal conductivity of the overlying strata. Numerical analysis software was used to estimate rock thermal conductivity at different temperatures. These estimates were then used with COMSOL Multiphysics to perform a numerical analysis with the heat conduction model. The results show that rock thermal conductivity decreases as the temperature increases and that various lithologies show similar behavior. The thermal conductivity of each rock type differs from the others at a given temperature. Exact values for the temperature distribution in the overlying strata during the process of underground coal gasification are obtained from the numerical simulation. The temperature in the rock changes with the height and direction from the gasifier. Temperature gradients vary for different types of rock. This result provides an important reference for further study of the strength of overlying strata subject to the process of underground coal gasification.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mining Science and Technology (China) - Volume 21, Issue 5, September 2011, Pages 709–713
نویسندگان
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