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时间:2020-03-25
《有限差分法解析自燃煤矸石山深部温度.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷第4期矿业安全与环保Vo1.42No.42015年8月MININGSAFETY&ENVIR0NMENTALPROTECTIONAug.2015夏清,胡振琪,王海娟,等.有限差分法解析自燃煤矸石山深部温度[J].矿业安全与环保,2015,42(4):1—3文章编号:1008-4495(2015)04-0001-03有限差分法解析自燃煤矸石山深部温度夏清,胡振琪,王海娟,许立江,张艳(中国矿业大学(北京)地球科学与测绘工程学院土地复垦与生态重建研究所,北京100083)摘要:基于固体热传导理论的非稳态温度场模型,采用实验模拟缓慢升温期的煤矸石山内部实际
2、导热情况,利用有限差分法对煤矸石山深部温度进行解析并研究深部温度热传导规律。结果表明:距热源0.2nl深度范围内,温度急剧下降,温升幅度较大,而随着距热源的距离增加,温度下降至40℃左右,最后趋于外界稳定温度值20oC。利用有限差分法对模型进行解析,计算得出温度实测值与解析值的最大误差为8.56oC,最小误差仅为0.02oC,说明该模型解析精度较高,适用于自燃煤矸石山深部温度的解析与定量预测。关键词:煤矸石山;自燃;温度场;有限差分法;深部温度中图分类号:TD849.5文献标志码:A网络出版时间:2015-08—0418:49网络出版地址:http://w
3、ww.cnki.net/kcms/detail/50.1062.TD.20150804.1849.002.htmlAnalysisofInternalTemperatureofCoalGangueDumpwithSpontaneousCombustionBasedonFiniteDifferenceMethodXIAQing,HUZhenqi,WANGHa@an,XULo'iang,ZHANGYah(Instituteof,ReclamationandEcologicalReconstruction,CollegeofGeoscienceandSurvey
4、ingEngineering,ChinaUniversityofMiningandTechnology(Beijing),Beng100083,China)Abstract:ExperimentswereconductedtosimulatetheinternalheatconductionofthecoalganguedumpintheperiodofslowtemperaturerisewiththeunsteadystatetemperaturefieldmodelwhichwasbasedOfthesolidheatconductiontheory
5、。andanalysiswasmadeontheinternaltemperatureofthecoalganguedumpandstudywascarriedoutontheheatconductionruleoftheinternaltemperaturebyusingthefinitedifferencemethod.Theresultsshowedthatthetemperaturerapidlydecreasedandthetemperaturerisewaslargerintherangeof0.2mawayfromtheheatsource,
6、butwiththeincreaseofthedistancetotheheatsource.thetemperaturereducedtoabout40oCandfinallyitwasclosetotheenvironmentaltemperatureof20℃.Analysiswasmadeonthemodelbyusingfinitedifferencemethod,itwasobtainedthatthemaximumdifferencebetweenthemeasuredvaluesandtheanalyticalvalueswas8.56oC
7、andtheminimumdifferencewasonly0.02oC.thisindicatedthatthismodelhadahigheraccuracyandWassuitablefortheanalysisandquantitativepredictionoftheinternaltemperatureofthecoalganguedump.Keywords:coalganguedump;spontaneouscombustion;temperaturefield;finitedifferencemethod;internaltemperatu
8、re煤矸石是我国排放量最大、利用率较低的工业山。到目前为止,我国约
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