多进风井筒自然风压影响作用及机理研究

Study on Mechanism of Natural Ventilation Pressure and Effect on Mine with Multiple Downcast Shafts

针对某矿由于主副立井温差而导致井底车场风流紊流问题,研究了多进风井筒特殊通风网络结构在自然风压作用下的风流流动规律。首先,分析了自然风压的存在对整个矿井通风状况及风机工况点的影响作用及其规律。其次,通过研究自然风压对并联与角联局部网络分支的影响作用,分析了自然风压对多进风井筒形成的局部网络分支的影响规律。最后,研究了不同时期自然风压对某矿井通风系统整体及局部的影响规律并通过模拟实验进行验证。

Focused on the airflow disorder in shaft station caused by temperature difference between main and auxiliary shaft, the airflow laws under the influence of natural ventilation pressure on mine with multiple downcast shafts are studied. Firstly, natural ventilation pressure＇s influences on the whole mine ventilation condition and fan operating point are analyzed. Then, through studying the influence of natural ventilation pressure on the parallel connection and diagonal branches local network structures, the influence of natural ventilation pressure on the local ventilation network structure with multiple downcast shafts is analyzed. Finally, the global and local influences of natural ventilation pressure on a mine ventilation system in different periods are studied and simulation experiments were carried out to verify the theory.