摘要
本文扼要阐述了开展露天矿通风研究、尤其是进行实验室风洞物理模拟研究的必要性。对露天矿通风模拟风洞的研制作了简介,指出了本风洞所具有的特点。文中介绍了最近完成的二项风洞模拟实验:对大冶露天矿深部开采风流结构及其污染物扩散净化能力进行了模拟研究,发现该矿具有比较独特的三维风流结构;对大爆破后靠自然风力稀释烟尘蘑菇云团所需的停工通风时间,分别完成了以风速 U_0和炸药量 A 为单因素变量的两组试验,揭示了通风时间与地表风速 U_0、炸药量 A_0的本质联系,推导出了通风时间的计算式。
This paper describes the necessity of researching thedeep opencut ventilation,especially by means of modeling testusing windtunnel in laboratory.The design of opencut ventilation simulationtest wind tunnel which has been built in recent time is presented brief-ly and two modeling tests are introduced.The wind structure and pol-lution diffusion ability of the DAYE opencut as well as the time need-ed for diluting explosive smoke by means of natural wind has beenresearched.It was found that ventilation time has the close relation withsurface wind velocity and the-quantity of explosive.The calculationequation of natural ventilation time has been made out.
关键词
露天矿
通风
风洞实验
风场
模拟
opencut ventilaation
wind tunnel tests
wind field
largescale blast ventilation
