摘要
为改善高海拔矿井作业场所低压低氧的环境,对高海拔矿井局部增压通风系统进行设计。基于增阻、增能和堵漏3种作业场所局部增压方式的数学模型,采用Ventsim对高海拔矿井局部增压通风系统进行构建和模拟。结果表明,增阻通风、增能通风和堵漏3种局部增压方式均能实现工作面的增压效果;但增能与增阻结合的增压方式较单一的增压方式效果更好。当风机为37 kW的矿用轴流通风机,风窗的风阻值为4.000 N·s^(2)/m^(8)时,工作面压力上升730 Pa,相当于海拔下降150 m。因此,高海拔矿井局部增压通风方案可有效改善工作面低压低氧的现场环境。采用该优化方案对西藏某矿井进行通风网络解算,使风流得以最大限度地流入采场,实现了按需通风,为解决高海拔矿井作业场所缺氧问题提供了参考方案。
In order to improve the low pressure and low oxygen environment of high-altitude mining workplace,the local pressurization ventilation system of high-altitude mine was designed.Based on three mathematical models of the local pressurization methods of resistance increase,energy increase and leakage plugging,Ventsim was applied to construct and simulate the local pressurization ventilation system in high-altitude mine.The results show that the pressurization effect of the working faces can be achieved by three local pressurization methods,including resistance increasing ventilation,energy increasing ventilation and leakage plugging.However,the air pressurization method combining resistance increase and energy increase works better than the single air pressurization method.When the mine axial flow fan’s power is 37 kW and the wind resistance value of the wind window is 4.000 N·s^(2)/m^(8),the pressure of the working face would be increased by 730 Pa,which is equivalent to a 150 m drop in altitude.Therefore,the local pressurization ventilation method of high-altitude mine can effectively improve the on-site environment of low pressure and low oxygen in the working faces.The optimization scheme was used to settle the ventilation network of a mine in Tibet,which made the air flow into the stope to the maximum extent and realized the on-demand ventilation.The study can provide a reference for solving the problem of hypoxia in high-altitude mine workplaces.
作者
姚尚辉
张国梁
杨向东
刘福明
YAO Shanghui;ZHANG Guoliang;YANG Xiangdong;LIU Fuming(Tibet Huatailong Mining Development Co.,Ltd.,Lhasa,Tibet 850212,China;Key Laboratory of Ministry of Education for Efficient Mining and Safety in Metal Mines,University of Science and Technology Beijing,Beijing 100083,China)
出处
《矿业研究与开发》
CAS
北大核心
2022年第9期158-164,共7页
Mining Research and Development
基金
国家重点研发计划项目(2016YFC0801700)。
关键词
高海拔矿井
低压低氧
增压通风
数值模拟
High altitude
Low pressure and low oxygen
Local air pressurization
Ventsim
Numerical simulation
