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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。
The model parameters of coal outcrop fire area were determined by using the simulation criterion of fluid motion similarity to make similar simulation experimental device of outcrop fire area. The experimental device was used to simulate the coal combustion process in outcrop fire area, and the conclusion was drawn that the larger the combustion distance in the coal outcrop fire area, the smaller the coal fire spread rate, and the relation equation between the combustion distance and the spread speed of coal fire was fitted. By changing the inlet wind speed in the experiment, the larger the inlet wind speed, the greater the spreading speed of coal fire and the longer the combustion distance.