Research Progress of Explosion Suppression and Isolation Technology of Gas and Coal Dust

Abstract

In this paper, the research progress and development trend of gas and coal dust explosion suppression and isolation technology in China are reviewed and discussed from the aspects of basic research, passive explosion suppression and isolation technology, active explosion suppression and isolation technology and development trend. Large-scale test tunnels and test pipes of various diameters are used to conduct experimental research on the propagation law of gas and coal dust explosion flame and shock wave, which provides a theoretical basis for the development of explosion suppression and isolation technology. The active explosion suppression and isolation technology and equipment are developed to detect the explosion signal in advance, spray the explosive inhibitor actively, isolate and extinguish the flame. The passive explosion isolation technology and equipment, such as rock powder shed, water tank shed and water bag shed, have been popularized and applied in underground coal mines in China. The sealed water bag and automatic water injection device are further developed to solve the problems of easy evaporation and pollution of water. The mechanical explosion isolation device has been developed and the passive explosion isolation technology and equipment system have been improved. The technology of gas coal dust explosion suppression and flameproof adapts to the development trend of intelligent and unmanned coal mines. It realizes hierarchical start-up and linkage control through intelligent means to form a regional joint control technology to achieve effective control of gas (coal dust) explosion disasters.

Keywords

• gas coal dust explosion
• explosion flame
• flameproof
• explosion suppression
• flame-proof shed water
• mechanical flameproof device