论文部分内容阅读
一、引言对于地采矿山的中段通风网路,存在着风流稳定性和正常作业时粉尘浓度分布的均匀性等问题,而这两个问题对于一定的通风网来说往往是有冲突的。稳定性最好的是混流式通风网,但这种通风网中正常作业时上中段各采场粉尘浓度分布却极不均匀。例如,对于分散供风集中排风的场合,若按各采场均匀分风时,上部作业面的粉尘浓度为正常浓度的1～1.5倍。1979年,东北工学院王英敏提出了一个使粉尘浓度近似均匀的分风方法,可使
I. INTRODUCTION For the mid-section ventilation network of mining mines, there are some problems such as the stability of wind flow and the uniformity of dust concentration distribution during normal operation. These two problems often have conflicts for certain ventilation networks. The best stability is the mixed flow ventilation network, but the ventilation network in the normal operation of the upper middle section of the dust concentration distribution is very uneven. For example, for decentralized supply of wind concentrated exhaust occasions, if the air evenly divided by the stope, the dust concentration of the upper working surface of the normal concentration of 1 to 1.5 times. In 1979, Wang Yingmin of Northeastern University of Technology proposed a method of dividing the dust concentration approximately evenly,