| 关于岩石导热性野外测定方法的研究 |
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| 引用本文： | 江海.关于岩石导热性野外测定方法的研究[J].地质与资源,2020,29(3):282-288. |
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| 作者姓名： | 江海 |
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| 作者单位： | 山东正元地质资源勘查有限责任公司, 山东 济南 250000 |
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| 摘 要： | 导热系数是岩石重要的物理参数之一,其在地热能开发及岩土热工程应用中有着重要意义.目前的测试方法需要将岩样采回实验室进行表面加工,运输和加工过程会破坏岩石结构和影响含水率等,不仅测试工艺复杂,而且导致测试结果不准确.本研究提出一种现场获取岩石导热系数的新方法.利用导热耦合剂填充岩石表面与探头之间的接触面,减小测试过程中的接触热阻,辅助热物性测试仪器来开展野外导热系数测试工作.通过配制不同导热硅脂与不同铜粉掺量充分混合的导热耦合剂进行对比实验,确定导热耦合剂的最优配比.实验表明,导热耦合剂的涂抹能有效地减小探头与岩石表面的接触热阻,提高测试精度,且导热耦合剂本身对岩石的导热系数影响甚微.研究成果可为野外准确便捷地获得岩石导热系数提供参考.
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| 关 键 词： | 岩石导热性 导热系数 热物性测试仪 导热耦合剂 野外测定 |
| 收稿时间： | 2019-12-13 |
STUDY ON THE FIELD MEASUREMENT METHOD OF ROCK THERMAL CONDUCTIVITY |
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| JIANG Hai.STUDY ON THE FIELD MEASUREMENT METHOD OF ROCK THERMAL CONDUCTIVITY[J].Geology and Resources,2020,29(3):282-288. |
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| Authors: | JIANG Hai |
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| Institution: | Shandong Zhengyuan Geological Resources Exploration Co., Ltd., Jinan 250000, China |
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| Abstract: | Thermal conductivity coefficient, as one of the important physical parameters of rock, is of great significance in geothermal energy development and geotechnical thermal engineering application. The current test method requires the collected rock samples to be processed in the laboratory. The transportation and processing can damage the rock structure and affect the water content. It needs a complex test process, and yields inaccurate results. This study proposes a new test method to obtain the thermal conductivity coefficient of rock on site. The contact surface between rock surface and probe is filled with thermal coupling agent to reduce thermal contact resistance during the test process, and the field thermal conductivity test is carried out with the aid of the thermophysical property tester. The optimal ratio of thermal coupling agent is determined by the comparison experiment of preparing thermal coupling agents by fully mixing different amounts of thermally conductive silicone grease and copper powder. The experiment shows that the application of thermal coupling agent can effectively reduce the thermal contact resistance between probe and rock surface, and improve the test precision. Moreover, the thermal coupling agent itself has little effect on the thermal conductivity coefficient of rock. The research results can provide reference for obtaining thermal conductivity coefficient of rock accurately and conveniently in the field. |
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| Keywords: | thermal conductivity of rock thermal conductivity coefficient thermophysical property tester thermal coupling agent field measurement |
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