压入式局部通风掘进巷道内热环境数值模拟研究  

Numerical simulation of the thermal environment of forcing type ventilation at diving airway

作　　者：向立平[1,2] 王汉青[3] 

机构地区：[1]湖南科技大学能源与安全工程学院,湖南湘潭411201 [2]湖南矿山通风与除尘装备工程技术研究中心,湖南湘潭411000 [3]湖南工业大学土木工程学院,湖南株洲412008

出　　处：《矿业工程研究》2009年第4期71-74,共4页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(10775047);湖南省科技计划重点资助项目(2007FJ2006)

摘　　要：采用三维k-ε紊流模型,利用Fluent软件模拟了2种风筒送风方式下,压入式局部通风掘进工作面风流与巷道围岩的热交换过程,得到了掘进巷道内速度场、温度场以及人体热舒适指标(PMV-PPD)分布图.计算结果表明,边长为0.7 m的风筒、风速6 m/s和空气温度20℃的送风方式,较其它送风方式能为矿工提供更好的热舒适工作环境;在掘进巷道同一截面不同高度的温差小于3℃;在掘进巷道内人体活动区域预测平均投票数平均值低于0.5,预测不满意百分数平均值小于20%,靠近掘进巷道侧风速较大,人体有吹风感.在满足人体热舒适的条件下,采用较大直径送风筒和相对较低的送风速度的送风方式有利于气流组织对有害物质的稀释和排出.Based on k-ε turbulence model, this paper made a numerical simulation of thermal environment and heat-and-mass-transfer at diving airway with high temperature and high humidity mine by using Fluent software, and evaluated the thermal comfort of environment with two forcing auxiliary ventilation manners at diving airway by Predicted Mean Vote（PMV） and Predicted Percent Dissatisfied（PPD）. Air flow field, temperature field, PMV and PPD values fields in high temperature and humidity diving airway have been obtained. The results of our numerical simulations show that forcing ventilation by 6m/s air velocity and 20℃ from blasting pipe can offer to better thermal environment for miner. The maximum temperature gradient of the different heights in the same sections no more than 3 ℃,whereas the mean value PMV and PPD are less than 0.5 and 20%. Miners feel being in a draught at near diving airway. The ventilation manner by a big blasting pipe and less air velocity is making for diluting and discharging contaminated air.

关 键 词：掘进巷道 热舒适 热舒适评价指标 数值模拟 

分 类 号：TD721[矿业工程—矿井通风与安全]