基于热湿交换理论的巷道风流温、湿度影响因素研究
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摘要
为了研究巷道风流参数的影响因素、预测风流温湿度的变化规律,结合热湿交换理论,建立了风流与围岩壁面之间热湿交换的数学模型,以及贴体坐标系下围岩内部温度场的导热微分方程;利用数值方法,将围岩内部的导热问题与影响风流参数变化的热湿交换问题耦合起来,并以大柳塔煤矿52505综采工作面为例进行计算,得到了与实测参数较为一致的模拟结果,验证了该数值方法的有效性。研究结果表明:风流温度受原始岩温、入风流温度、局部热源强度等因素的影响,风流相对湿度与入风流温、湿度以及井下湿源的数量和强度有关;巷道壁温作为将围岩温度场与风流参数之间关联起来的主要因素,对模拟结果影响较大,其数值取决于壁面与风流之间热湿交换以及围岩原始岩温。
To study the factors influencing the parameters of airflow in roadway,and predict the change laws of airflow's temperature and humidity,combined with the theory of heat and moisture exchange,a mathematical model on the heat and moisture exchange between airflow and wall of surrounding rock was established,as well as the differential equations of heat conduction for the internal temperature field of surrounding rock in the body-fitted coordinates. The problem of heat conduction in the surrounding rock and the problem of heat and moisture exchange influencing the change of airflow parameters were coupled by using the numerical method,and the calculation was conducted by taking the 52505 fully-mechanized mining face in Daliuta coal mine as an example,then the simulation results being relatively consistent with the measured parameters were obtained,which verified the effectiveness of the numerical method. The results showed that the temperature of airflow was affected by the original rock temperature,inlet airflow temperature,local heat source strength and other factors,while the relative humidity of airflow was related to the temperature and humidity of inlet airflow and the amount and strength of underground moisture sources. As the main factor that correlated the temperature field of surrounding rock with the airflow parameters,the wall temperature of roadway had great influence on the simulation results,and its values depended on the heat and moisture exchange between wall and airflow and the original rock temperature of surrounding rock.
To study the factors influencing the parameters of airflow in roadway,and predict the change laws of airflow's temperature and humidity,combined with the theory of heat and moisture exchange,a mathematical model on the heat and moisture exchange between airflow and wall of surrounding rock was established,as well as the differential equations of heat conduction for the internal temperature field of surrounding rock in the body-fitted coordinates. The problem of heat conduction in the surrounding rock and the problem of heat and moisture exchange influencing the change of airflow parameters were coupled by using the numerical method,and the calculation was conducted by taking the 52505 fully-mechanized mining face in Daliuta coal mine as an example,then the simulation results being relatively consistent with the measured parameters were obtained,which verified the effectiveness of the numerical method. The results showed that the temperature of airflow was affected by the original rock temperature,inlet airflow temperature,local heat source strength and other factors,while the relative humidity of airflow was related to the temperature and humidity of inlet airflow and the amount and strength of underground moisture sources. As the main factor that correlated the temperature field of surrounding rock with the airflow parameters,the wall temperature of roadway had great influence on the simulation results,and its values depended on the heat and moisture exchange between wall and airflow and the original rock temperature of surrounding rock.
引文
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[14]陶文铨.数值传热学[M]. 2版.西安:西安交通大学出版社,2001.
[15] PATANKAR S V. Numerical heat transfer and fluid flow[M].New York:Hemisphere Pub. Corp.,1980.
[2]王文,桂祥友,王国君.矿井热害的治理[J].矿业安全与环保,2002,29(3):31-33.WANG Wen,GUI Xiangyou,WANG Guojun. The treatment of mine heat hazard[J]. Mining Safety and Environmental Protection,2002,29(3):31-33.
[3]高建良,张学博.潮湿巷道风流温度与湿度变化规律分析[J].中国安全科学学报,2007,17(4):136-139.GAO Jianliang,ZHANG Xuebo. Analysis on the changing rule of airflow’s temperature and humidity in wet airway[J]. China Safety Science Journal,2007,17(4):136-139.
[4]时岚,张学博.潮湿巷道围岩散热影响因素的数值分析[J].煤炭科学技术,2009,37(9):51-53.SHI Lan,ZHANG Xuebo. Numerical analysis of surrounding rock heat radiation influence factors of mine wet and moisture roadway[J]. Coal Science&Technology,2009,37(9):51-53.
[5]杨胜强.高温、高湿矿井中风流热力动力变化规律及热阻力的研究[J].煤炭学报,1997,22(6):69-73.YANG Shengqiang. Study on change law of thermal dynamic of air flow and thermal resistance in high temperature and high humidity mine[J]. Journal of China Coal Society,1997,22(6):69-73.
[6]宋晓燕,谢中朋.三河尖煤矿热力参数测定及热湿源危害分析[J].中国安全生产科学技术,2012,8(12):174-178.SONG Xiaoyan,XIE Zhongpeng. Heat parameter determination of Sanhejian mine and research of heat-harm cause[J]. Journal of Safety Science and Technology,2012,8(12):174-178.
[7]刘景秀,李慧,周磊.干燥巷道围岩传热对平巷风流温度影响研究[J].金属矿山,2011,40(8):147-150.LIU Jingxiu,LI Hui,ZHOU Lei. Influences of wall rock heat transmitting on airflow temperature in dry roadway[J]. Metal Mine,2011,40(8):147-150.
[8]侯祺棕,沈伯雄.井巷围岩与风流间热湿交换的温湿预测模型[J].武汉工业大学学报,1997,19(3):125-129.HOU Qizong,SHEN Boxiong. The prediction model of temperature and moisture transfer between tunnel periphery rock and air[J].Journal of Wuhan University of Technology, 1997, 19(3):125-129.
[9]刘何清,王浩,邵晓伟.高温矿井湿润巷道表面与风流间热湿交换分析与简化计算[J].安全与环境学报,2012,12(3):208-212.LIU Heqing,WANG Hao,SHAO Xiaowei. Analysis and a simplified calculation method of the thermo-moisture exchange between the hot mining roadway wall and the airflow[J]. Journal of Safety&Environment,2012,12(3):208-212.
[10]高建良,张学博.潮湿巷道风流温度及湿度计算方法研究[J].中国安全科学学报,2007,17(6):114-119.GAO Jianliang,ZHANG Xuebo. Study on method of temperature and humidity calculation of airflow in wet airway[J]. China Safety Science Journal,2007,17(6):114-119.
[11]何昌富,刘何清,殷维,等.水分蒸发引起巷道局部壁温低于风温的理论分析[J].矿业工程研究,2014,29(1):35-38.HE Changfu,LIU Heqing,YIN Wei,et al. Theoretical analysis of tunnel wall local temperature lower than airflow temperature caused by evaporation in mines[J]. Mineral Engineering Research,2014,29(1):35-38.
[12]舍尔巴尼.矿井降温指南[M].黄翰文译.北京:煤炭工业出版社,1982.
[13]张学博.潮湿巷道围岩散热及风流温度、湿度计算[D].焦作:河南理工大学,2007.
[14]陶文铨.数值传热学[M]. 2版.西安:西安交通大学出版社,2001.
[15] PATANKAR S V. Numerical heat transfer and fluid flow[M].New York:Hemisphere Pub. Corp.,1980.