岩石热导率的温压实验及分析

AN EXPERIMENTAL STUDY OF ROCK THERMAL CONDUCTIVITY UNDER DIFFERENT TEMPERATURE AND PRESSURE

岩石热导率是岩石热物性中最主要者，是研究地壳和上地幔热结构、地球深部热状态以及各种工程岩体内空气与围岩之间热交换的重要参数，该参数的测定不但是大地热流测量的重要内容之一，也是矿山采掘、石油开发和地热能利用不可缺少的工作。本文简要介绍了利用环形热源法在不同温压条件下对岩石热导率的测试和研究。文中不但介绍了测量原理和测量装置结构，并给出了不同岩性岩石在室温至１８０℃、常压至２２ＭＰａ状态下的测量结果，最后还就测量结果进行了分析与讨论。

Rock thermal couductivity is a major thermophysical property of rocks. It is an important parameter in studies on the cruist and upper mantle thermal strcture ,the thermal status in the Earth’s interior and the heat exehange between the air and the wall rocks in varions engineering projects. Its determination is not only a sigmificant item in terrestrial heat flow measurements, but also a necessary component in mining, oil exploitation and geothermal energy development. In this paper a brief inrroduction to thedetermination of and study on the rock thermal conductivity under different temperatures and pressures using a ring-heat-source method is given.Along with the principle of determination and the structure of the meauring device presented in the paper also given are the experimental results of the thermal condutivities of various types of rocks deermined in ranges form room temperature to 180℃ and from ambient pressure to 22 MPa.Ultimatelymsome analysis and discussion on the experimental results are presented.