第44卷第2期 2017年4月
矿业安全与环保
MINING SAFETY & ENVIRONMENTAL PROTECTION
马需，魏高明，李珍宝，等.煤导热系数影响因素的实验研究[J].矿业安全与环保,2017,44(2);31-34. 文章编号：1008-4495(2017)02003104
煤导热系数影响因素的实验研究
马砺"2，魏高明"2李珍宝"2,秦晓阳1,2
(1.西安科技大学西部矿井开采及灾害防治教育部重点实验室，陕西西安710054；
2.西安科技大学能源学院，陕西西安710054）
Vol. 44 No. 2 Apr.2017
摘要：导热系数是影响煤体热传导的重要参数。为了研究煤在不同温度及含水率条件下的传热特性，采用LFA457型激光导热仪，测试了不同温度、不同含水率条件下不粘煤、气煤两种煤样的导热系数，并采用邓氏灰色理论将煤导热系数与其内在影响因素进行灰色关联分析。研究结果表明：温度为-50~=30℃时，煤的导热系数快速减小；温度为-30~+10℃时，煤的导热系数快速增大；湿度为+10~ +50℃时，煤的导热系数呈缓慢增大趋势：随著煤含水率的增加导热系数开始快速增大，然后趋于平稳。灰色关联分析表明，煤内在因素中的固定碳、灰分、挥发分是影响煤导热系数的主要因素。
关键词：导热系数；温度；含水率；内在因素：灰色系统理论
中图分类号：TD75;TQ533
文献标志码：A
网络出版时间：2017-04-1110：12
网络出版地址:http://kns.cnki. net/kcms/detail/50.1062.TD.20170411.1012.042.html Experimental StudyonInfluenceFactors of Thermal Conductivity of Coal
MA Li'2, WEI Gaoming'-2, LI Zhenbao'.2, QIN Xiaoyang'-2
( J. Key Laboratory of Western Mine Exploration and Hazard Prezenzion, Ministry of Edaucation,
Xi' an Unirersity of Science and Technology, Xi' an 710054, China;
2. College of Energy, Xi' an Unizersity of Science and Technology, Xi' an 710054, China)
Abstract : The thermal conductivity is an important parameter affecting the heat conduction of coal. In order to research the heat transfer characteristics of coal under the conditions of different temperatures and moisture contents, LFA457 laser themal conductivity testing instrument was applied to measure the thermal conductivity of noncaking coal and gas coal under the conditions of different temperatures and moisture contents, and the influence of the internal factors of coal on its themal conductivity was analyzed by using the Deng's grey theory. The results showed that when the temperature was 50 °C to 30 °C , the thermal conductivity of coal decreased rapidly ; when the temperature was 30 C to +10 °C , the thermal conductivity of coal increased rapidly; when the temperature was +10 °C to +50 °C, the thermal conductivity of coal tended to slowly increase; and with the increase of the moisture content of coal, the thermal conductivity started to increase rapidly, and then tended to be stable. The grey correlation analysis showed that the fixed carbon, ash and volatile matter of coal were the main faclors affecting its thermal conductivity,
Keywords : thermal conductivity : temperature; moisture content ; intemal factor; grey system theory
导热系数是煤岩热传导和化学动力学的重要基础参数之一()。理论计算和实验测定是目前表征导热系数的两种方法，但大多数物质的导热系数很难
收稿日期：201609-23;2017-0302修订
基金项目：国家自然科学基金面上项目（51574193）；陕西省教育厅科研计划专项(14JK1477）
作者简介：马轰（1978一），男，四川隆昌人，教投，颈士研究生导师，主要从事重大灾害事故防治与应急教援技术研
究工作。万方数据
通过理论预先计算出来。因此，实验测定法成为测量煤导热系数可靠方法
导热系数的测定方法可分为稳态法和瞬态法两类[2]。其中，瞬态法测试时间短，只需几分钟；而稳态法需要长达几小时的时间。相比之下，瞬态法实验公式复杂，对环境要求低；而稳态法实验公式简单，对环境要求高[3]。对导热系数的研究能够为煤多次氧化及其传热特性提供依据，彭担任等+在对矿井热害问题的研究中发现物体导热系数与温度的
· 31 ·