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在过去的20年里，很多国家都在煤矿和金属矿进行了可控循环通风的研究。这些研究表明，除获得经济效益外，可控循环风还可以解决边远巷道风量不足的问题。同时指出，由于循环系统中使用了辅扇和调节设施，因而引起瓦斯流动和瓦斯浓度发生瞬变。已有许多模型对此进行解释，然而大多数模拟过程并未结合扩散、泄漏等重要因素。本文以煤矿冒落区瓦斯泄出瞬态理论为基础，用“罐箱－风巷”网络模型来描述这个问题，并提出解决办法。本文还从实验模型中得出了测定影响可控循环风系统瓦斯浓度和持续时间的一些主要因素。在这个模型中，设计了一个瓦斯注入系统，以模拟由于风压不同而引起的瓦斯泄出率变化。模型用一组辅扇和调节器来改变模型内的风压。最后，本文提出了一种算法和计算机程序GASTRAN，用于分析复杂通风网络的瓦斯浓度瞬变和计算污染物水平。计算机程序通过一个实例加以说明。
In the past two decades, many countries have conducted controlled circulation ventilation studies in coal mines and metal mines. These studies show that in addition to the economic benefits, the controlled circulation of the wind can also solve the problem of lack of wind in the remote roadway. Also pointed out that due to the auxiliary system used in the circulatory system and regulatory facilities, which led to gas flow and gas concentration transient. There are many models to explain this, however, most of the simulation process does not combine diffusion, leakage and other important factors. Based on the theory of gas leaking transient in the caving area of coal mine, this paper describes the problem with “tank-wind tunnel” network model and puts forward the solution. In this paper, some main factors that affect the gas concentration and duration of controllable circulating wind system are also obtained from the experimental model. In this model, a gas injection system was designed to simulate changes in gas discharge rates due to different wind pressures. The model uses a set of auxiliary fans and adjusters to change the pressure in the model. Finally, an algorithm and computer program, GASTRAN, is proposed to analyze gas concentration transients and calculate pollutant levels in complex ventilation networks. The computer program is illustrated by an example.