Continual monitoring technology of the natural ventilation pressure and its application countermeasures in coal mine. Issue 2 (August 2020) - Tong, Xiaozhang
Abstract: In order to prevented the adverse effects of natural ventilation pressure vary in coal mines, the paper proposed a method to continual monitoring natural ventilation pressure vary, Dynamic grasp of natural ventilation pressure vary law. According to the relationship of mine ventilation energy, the method was calculated: to a stable ventilation system, meter water column vary Δx is linearly related to natural ventilation pressure vary ΔHN and air volume vary ΔQ. Using this method, the natural ventilation pressure vary in Panyi Mine was measured, the law of natural ventilation pressure vary in PanYi Coal Mine was as follows: The natural ventilation pressure vary periodically within one day, in abnormal weather, the range of natural ventilation pressure vary within one day reached 350Pa, and the range of fluctuation for mine air volume reached 3.2%. The article illustrated the case of local ventilation system instability caused by abnormal vary of natural ventilation pressures through examples, put forward countermeasures to deal with the vary of natural ventilation pressures. The application of continuous monitoring the natural ventilation pressure could quantitatively grasp the natural ventilation pressure vary in real time and provided a reliable basis for formulating the application countermeasures of the natural ventilation pressure vary.