Rapid airtight technology and equipment in underground coal mine disaster area

In view of coal mine fire, gas explosion thermodynamic disasters such as a serious threat to the coal mine safety in production and life safety of workers, by studying the mechanism of fire and gas explosion shock wave attenuation rule, construct the shock wave pressure data model, airtight device by shock wave strength calculation method is put forward, in order to determine an airtight device design strength.According to the strength and roadway equipment, the structure of the airtight device should be designed reasonably to ensure that the sealing effect and impact resistance of the airtight device meet the design requirements. The disaster environment and visual monitoring technology are used to set up three control methods: electric control, air control and manual control to realize remote control, rapid isolation and airtight disaster areas. Through laboratory test and field industrial test, test data were collected to verify that the equipment and technology can realize remote control, fast airtight and have good impact resistance. It has solved the problem of fast airtight of fire and gas and other kinds of disasters in multi-equipment complex roadway, established the active prevention and control reduction system of coal mine, and ensured the safety of disaster relief personnel.