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随着我国对煤矿高产高效发展的要求,多年前已由四米采高的综采工作面发展到七米高综采工作面。然而,开采时产生的大量煤尘已无法用原先的除尘设备进行处理,大量且高速的煤尘颗粒会给回采面作业人员的健康带来极大危害。为了获得大采高综采工作面煤尘运移过程中的浓度分布,该研究基于气-固两相流(欧拉-拉格朗日模型)理论,基于矿井现场实际参数利用FLUENT软件进行模拟。通过模型计算及分析得出巷道内煤尘运移的浓度分布状况,并且设置位置恰当的风幕装置,以处理煤尘。
As China’s requirements for high-yield and high-efficiency coal mines, many years ago, the fully-mechanized face with a height of four meters has been developed to reach a fully-mechanized face of seven meters in height. However, the large amount of coal dust generated during the mining process can not be handled by the original dust removal equipment, and the large amount of high-speed coal dust particles can bring great harm to the health of the workers working on the mining face. In order to obtain the concentration distribution of coal dust in the fully mechanized mining face with high cutting height, the study was based on the gas-solid two-phase flow (Eulerian-Lagrangian model) theory and was simulated using FLUENT software based on actual mine site parameters . Through the model calculation and analysis, the concentration distribution of the coal dust in the roadway is obtained, and the air curtain device with proper location is set up to treat the coal dust.