露头火区煤火蔓延规律相似模拟实验研究

Analog Simulation Experiment Research on Coal Fire Spread Law in Outcrop Fire Area

利用流体运动相似模拟准则确定煤田露头火区的模型参数,制作露头火区相似模拟实验装置。利用实验装置进行露头火区煤火燃烧过程模拟,得出在煤田露头火区中燃烧距离越大,煤火蔓延速度越小,并且拟合得到了煤火燃烧距离和蔓延速度间的关系方程。通过改变实验中的进口风速,得到进口风速越大,煤火蔓延速度越大,燃烧距离越长。

We use fluid motion analog simulation criteria to determine the model parameters of coalfield outcrop fire area. According to the parameters,we make simulation experiment devices,and use the experimental devices to simulate burning process of outcrop fire area. It is concluded that the greater the burning distance of coal fire,the smaller spread speed in the outcrop fire area. And we fit and get the relationship between the coal fire burning distance and velocity. By changing the wind speed of import,it is obtained that the greater the wind speed the greater the fire spread speed and the longer the burning distance.