苏家沟煤矿采空区氧化带分布规律研究

Study on Distribution of Oxidation Zone in Goaf of Sujiagou Coal Mine

基于苏家沟煤矿4109综采工作面实际情况进行研究,首先通过束管检测系统实测采空区O_2、CO、CO_2等气体的含量随着工作面推进度改变而发生的变化;然后建立针对4109综采工作面采空区的组分运输模型,利用FLUENT对采空区O_2浓度分布规律进行数值模拟,并结合现场实测的数据验证数值模拟结果的准确性;最后根据模拟结果将氧化带与散热带和窒息带的边界拟合成公式,这对该矿采空区氧化带的划分以及煤炭自燃的防治具有一定的指导作用。

Based on the actual situation of 4109 fully mechanized mining face in Sujiagou coal mine, firstly measured the change of gas content of gob area, such as O2, CO, CO2, etc., with the change of the working face's degree of advancement through the beam inspection system;based on the component transportation model in goaf of 4109 fully mechanized mining face, FLUENT was used to simulate the distribution law of oxygen concentration in the goaf, and the accuracy of the numerical simulation results was verified by the data measured in the field. Finally, the oxidation band was calculated based on the simulation results. The boundary of the heat sink and the asphyxiation belt is fitted into a formula, which has a certain guiding role in the division of the oxidation zone in the goaf of the mine and the prevention and control of coal spontaneous combustion.