The porous-leak-pressure barrier explosion of the automatic air-door that is used in the mine

Aiming at the limitation of the inerting technology of sprinkling rock powder, the passive barrier explosion technology and the automatic barrier explosion technology, and considering the functions of the ceramic foam which has the effects of flame quenching and the reduction of shock wave, we can use the features of these to isolate the spread of the flame of gas explosion and the shock wave. This paper suggests to establish the automatic air door of underground coal mine using the ceramic foam as the main material. The materials consist of the ceramic foam, the asymmetric porous metal materials, the pressure sensor and the PLC software control device. The pressure sensors have been assembled to both sides of the air door. There are windows to be assembled at the bottom of the air door to proctect it using the PLC software to control it. We also assemble the threshold sensor, the photosensitive sense device, the device to prevent clipping vehicles and the acoustic-optic indicator to achieve the function of controlling the airflow before the disaster and the fuction of leaking pressure autimatically and isolating the spread of the flame of the gas explosion after the disaster. the barrier explosion of the automatic air-door is expected to be the important composition of the saving system of barrier explosion of the mine