采空区注砂防灭火最佳砂墙长度的确定

The Determination of the Optimal Length of Sand Wall for Injecting Sand to Prevent and Extinguish Fire in Goaf

计算机模拟方法是研究和分析多孔介质(采空区)中流体流动的有效方法,它在电子计算机上通过解算描述流体流动的微分方程进行数值模拟。本文通过实例求解根据弥散动力学和渗流理论建立的采场气体运移的数学模型,采用有限元方法在电子计算机上进行解算,利用所测得的实际数据反求系统的内部参数,对采场瓦斯、一氧化碳等有害气体的流动过程和浓度进行了数值模拟,求出最佳防火墙长度。

The computer simulation is an effective method to research and analyze the flow of the fluid of the porous medium(goaf), and it is used to calculate the differential equation and carry out numerical simulation through computer. The mathematical model of stope-gas entrainment, established according to dispersion dynamics and seepage theory, is solved through the cited actual example. The finite element method is adopted to calculate the mathematical model through the computer. The measured data are used to solve the inner parameters of the system. The flow process and thickness of the harmful gas such as the gas, the carbon monoxide and so in the stope is simulated numerically to Obtain the optimal length of fire-preventing wall.