岩石熱力學與力學性質之研究－以三種岩石為例

Thermal and Mechanical Properties of Three Types of Rock

蕭富元(F.Y. Hsiao) ； 陳聖文(S.W. Chen) ； 吳柏裕(P.Y. Wu) ； 王建力(C.L. Wang)

《鑛冶：中國鑛冶工程學會會刊》 53卷3期 (2009/09) Pp. 79-86

https://doi.org/10.30069/MM.200909_53(3).0009

摘要

本研究擬對花崗岩、大理岩、砂岩進行熱傳導試驗及熱膨脹試驗以了解脆性岩石的基本熱學性質，另外對岩石經歷常溫、及加溫至400℃、800℃後冷卻至常溫之力學性質進行了解，分析溫度作用對岩石尖峰應力、彈性模數、柏松比及應力應變曲線變化狀況。由研究結果發現三種岩石中熱傳導係數以大理岩最高，花崗岩次之，砂岩為最低；熱膨脹試驗結果顯示岩石熱膨脹係數會有隨溫度上升而增加的趨勢；高溫後基本力學試驗結果顯示岩石的尖峰應力、彈性模數及柏松比將隨溫度的提高而有降低的趨勢，尖峰應變則隨溫度升高而增加。

關鍵字

熱膨脹 ； 熱傳導 ； 高溫 ； 岩石

並列摘要

This study aims to investigate the thermal and mechanical properties of three types of rocks. Granite, marble and sandstone were heated to different elevated temperatures for two hours and were cooled to room temperature. The thermal and uniaxial compression tests were performed on these samples to determine their thermal conductivity and thermal expansion. The uniaxial strength, elastic modulus, and Poisson's ratio were determined from the tests. Results show that the marble has the highest thermal conductivity and the sandstone the lowest. The mineral composition and porosity are responsible for the difference in thermal conductivity. This study finds that the thermal expansions of rock samples increases with increasing temperature while the uniaxial strength, elastic modulus and Poisson's ratio decrease with an increase in temperature. This study demonstrates that the fundamental thermal and mechanical properties of rocks change after the thermal treatments.

並列關鍵字

rocks ； elevated temperature ； thermal conductivity ； thermal expansion