摘要
分析了呼吸性粉尘颗粒在巷道内水平和垂直方向运动时的主要受力情况;基于颗粒运动理论,建立呼吸性粉尘颗粒的运动方程,揭示了其在巷道内的运动特征;根据运动方程,确定了呼吸性粉尘颗粒以初速度0 m/s在垂直方向上及在风速1 m/s的水平方向上运动的终极时间、终极速度和终极距离等参数。开展试验,在模拟综掘工作面内发尘,使呼吸性粉尘颗粒以确定的运动参数在巷道内运动。试验结果证明:呼吸性粉尘将长时间在巷道内运动而不沉降,其在垂直方向上的粒径大小分布与地面距离成反比。试验结果与运动方程吻合,验证了呼吸性粉尘颗粒运动方程的正确性。
In this paper, the main forces of respirable dust particles moving in horizontal and vertical directions in the roadway were analyzed. Based on the particle motion theory, the motion equations of the respirable dust particles were established, and the movement characteristics of the respirable dust particles in the roadway were revealed. According to the motion equation, the parameters such as the final time, final speed and final distance of respirable dust particles moving in vertical direction with initial speed of 0 m/s and horizontal direction with wind speed of 1 m/s were determined. The test was carried out to generate dust in the simulated fully mechanized excavation face, so that the respirable dust particles could move in the roadway with the motion parameters determined. The test results prove that the respirable dust will move in the roadway for a long time without settling, and its particle size distribution in the vertical direction is inversely proportional to the ground distance. The experimental results are consistent with the motion equation, which proves the correctness of the motion equation of the respirable dust particles.
作者
赵政
ZHAO Zheng(CCTEG Chongqing Research Institute,Chongqing 400037,China)
出处
《矿业安全与环保》
北大核心
2023年第1期14-18,24,共6页
Mining Safety & Environmental Protection
基金
重庆市自然科学基金面上项目(cstc2020jcyj-msxmX0512)
中国煤炭科工集团重点项目(2021-2-TD-ZD009)。
关键词
呼吸性粉尘
颗粒运动
水平
垂直
运动方程
respirable dust
particle movement
horizontal
vertical
equation of motion
