摘要
为探明口孜东煤矿111307综采工作面热害生成主要原因和工人的热舒适性,对工作面检修期与生产期的热环境参数及围岩温度进行了现场实测,基于体感温度和PMV-PPD指标综合研究了工作面热舒适性的分布特征,计算了111307工作面需冷量,并提出了多级降温优化方案。研究结果表明:由机巷到切眼到风巷,工作面检修期及生产期的体感温度、预计平均热感觉指数(PMV)整体均呈现先升高后降低的趋势。生产期较高热风险区以上的区域占比相较于检修期提高了43.4%,不舒适区以上的区域占比相较于检修期提高了54.8%。生产期与检修期的高热风险区、极不舒适区的分布位置有所不同。111307工作面需冷量为4072.89 kW,应用大型空冷器对机巷区域及工作面上隅角进行分级降温,并在工作面切眼布置悬挂式小型空冷器对人员设备密集区域进行降温,理论上可有效提高制冷量的利用效率。
In order to find out the main causes of heat damage and the thermal comfort of workers in the 111307 fully mechanized working face in Kouzidong Coal Mine,the thermal environment parameters and surrounding rock temperature during the maintenance and production periods of the 111307 working face are measured on site.Based on the apparent temperature and PMV-PPD index,the distribution characteristics of thermal comfort of the working face are comprehensively studied,the chilling requirement of the 111307 working face is calculated,and a multi-level cooling optimization scheme is proposed.The results show that from the machine lane to the cut-hole to the wind lane,the apparent temperature and the predicted mean vote(PMV)of the working face during the maintenance period and the production period all shows a trend of first increasing and then decreasing.During the production period,the proportion of areas above the relatively high-thermal risk area increased by 43.4%compared with the maintenance period,and the area above the uncomfortable area increased by 54.8%compared with the maintenance period.The distribution positions of the high-thermal risk area and extremely uncomfortable area during the production period and the maintenance period are different.The chilling requirement of 111307 working face is 4072.89 kW.The application of large air coolers to cool the machine tunnel area and the corner of the working face in a graded manner,and the arrangement of hanging small air coolers in the working face cut-hole to cool the dense area of personnel and equipment,can effectively improve the utilization efficiency of cooling capacity in theory.
作者
索海翔
李辉
赵夏斐
欧盛南
王天暘
张洪玥
SUO Haixiang;LI Hui;ZHAO Xiafei;OU Shengnan;WANG Tianyang;ZHANG Hongyue(Safety Engineering Consultation and Evaluation Center,China Coal Group,Beijing 100010,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《中国矿业》
2023年第3期141-149,共9页
China Mining Magazine
基金
国家自然科学基金项目资助(编号:51874015)。
关键词
矿井热害
体感温度
热源分析
需冷量
降温方案
mine heat damage
apparent temperature
heat source analysis
chilling requirement
refrigeration scheme
