目前, 综掘面风筒出风口风流不能随时变化, 不能满足通风降尘的实际需求, 造成了安全隐患和污染风险的急剧上升.而风筒出风口方向角度、口径及前后距离参数变化调控可以优化粉尘运移分布, 有效提高降尘效率.研究采用粗糙集理论、有限元流场数值模拟技术及井下测试验证手段对综掘面不同巷道的空间尺寸和出风口方向角度、口径及前后距离参数下的调控规则获取方法进行研究, 建立决策信息系统、属性约简的区分矩阵算法、规则获取的启发式值约简算法, 并进行了出风口参数调控规则的获取及表达.对调控后粉尘质量浓度的分析可知, 巷道内粉尘质量浓度超限区域面积明显减少, 较原始场司机位置处的降尘率可提高48％, 为综掘面粉尘最佳分布和高效通风降尘提供了理论依据.%At present, the fact that the airflow of the air duct outlet in fully mechanized heading face cannot be adjusted and cannot meet the practical requirement of ventilation dust suppression may lead to the steep rise of safety hazard and pollution risk.While by adjusting the angle, caliber, and the distance from the air duct outlet to the heading face, the dust distribution can be optimized and the dust suppression efficiency can be effectively improved.The acquisition method of regulation rules under different sizes of the roadways, the angles, calibers, and distance from the air duct outlet to the heading face is investigated by using the rough set theory, finite element flow field numerical simulation and underground test verification.Then, the decision information system, the discernibility matrix algorithm for attribute reduction and the heuristic value reduction algorithm for rule acquisition are established, and the regulation rules of the outlet parameters are obtained and expressed.The dust concentration analysis after adjusting shows that the area of the dust concentration is significantly reduced and the dust reduction rate at drivers can be increased by 48％compared with the original field, which provides theoretical basis for the optimal dust distribution and dust suppression.
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