[1]李宗翔,林琳,贾进章,等.梯度升温地层中巷道风流温度分布计算研究[J].自然灾害学报,2018,(02):116-121.[doi:10.13577/j.jnd.2018.0214]
 LI Zongxiang,LIN Lin,JIA Jinzhang,et al.Study of calculation of airflow temperature distribution in roadways of strata with gradient increased temperature[J].,2018,(02):116-121.[doi:10.13577/j.jnd.2018.0214]
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梯度升温地层中巷道风流温度分布计算研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年02期
页码:
116-121
栏目:
出版日期:
2019-04-28

文章信息/Info

Title:
Study of calculation of airflow temperature distribution in roadways of strata with gradient increased temperature
作者:
李宗翔12 林琳12 贾进章12 张明乾12
1. 辽宁工程技术大学 安全科学与工程学院, 辽宁 阜新 123000;
2. 矿山热动力灾害与防治教育部重点实验室, 辽宁 阜新 123000
Author(s):
LI Zongxiang12 LIN Lin12 JIA Jinzhang12 ZHANG Mingqian12
1. College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, China;
2. Key Laboratory of Mine Thermodynamic disasters and Control of Ministry of Education, Fuxin 123000, China
关键词:
矿井热害地层梯度升温风流温度滞后温差MATLAB仿真
Keywords:
mine heat disastergeothermal gradientairflow temperaturehysteretic temperature differenceMATLAB simulation
分类号:
TD75+2.2;X93
DOI:
10.13577/j.jnd.2018.0214
摘要:
以往巷道围岩与风流热交换计算都是基于围岩地层温度恒定为条件的,为考虑地层地温随深度连续变化对通风巷道风流温度分布的影响,引入风流与围岩热交换的广义换热系数的概念。为简化分析,在假设暂不考虑巷道热湿蒸发或风流湿度饱和,以及无局部热源的前提下,推导了在地层深度梯度升温场中井巷风流与围岩热交换微分方程,即在围岩恒温条件下风流与围岩热交换方程中增加一项地层升温项。对不同巷道情况分别进行求解,结果得到,在地温梯度升温条件下,如果巷道足够长,水平巷道的风流温度终将与地温趋于一致;对倾斜的通风巷道,风流升温率与地温升温率趋于一致,在风流与巷道围岩之间热交换达到稳定后存在一个温度差,称为滞后温差,且该温差随着风量增大而增大。研究为解决矿井地下3D网域通风系统中风流温度分布计算仿真提供算法基础。
Abstract:
In the past, the calculation of the heat exchange between the roadway surrounding rock and the airflow is on the basis of the constant temperature gradient of surrounding rock. In order to consider the influence of the continuous variation of the ground temperature on the airflow temperature distribution in ventilating roadways, a generalized concept of heat transfer coefficient for the heat exchange between the airflow and the surrounding rock is introduced. In order to simplify the analysis, the differential equation of the heat exchange between the airflow and the surrounding rock in the stratigraphic depth gradient temperature rise field is deduced under the assumption that the thermal and humidity evaporation, or the airflow humidity saturation in roadways will not be considered, and there is no local heat source. That is, in the differential equation for the heat exchange between the airflow and the surrounding rock under the condition that the temperature of surrounding rock is constant, a stratigraphic warming item is added. The equations in the roadways with various situations are solved respectively. The research results shows that under the condition of temperature gradient, if the roadway is long enough, the airflow temperature will be consistent with the ground temperature in the horizontal roadway, and the airflow temperature rise rate will be consistent with the temperature rise rate of the ground temperature in an inclined roadway. There will be a temperature difference when the heat exchange between the airflow and the surrounding rock is stable, and the temperature difference is called hysteretic temperature difference. The hysteretic temperature difference increases with the increase of air quantity. The study can provide algorithm foundation for solving the problem of airflow temperature distribution calculation and simulation in the underground 3D ventilation system.

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备注/Memo

备注/Memo:
收稿日期:2017-05-05;改回日期:2017-09-12。
基金项目:国家自然科学基金项目(51774170,51374121)
作者简介:李宗翔(1962-),男,教授,博士生导师,从事煤矿重大灾害理论和灾变矿井通风研究.E-mail:lzx6211@126.com
更新日期/Last Update: 1900-01-01