Application of a New Type of Gel Fire Prevention Technology in Fully Mechanized Coal Face with Large Mining Height

Abstract

There are a lot of coal left in goaf at the both air inlet and outflow sides of large mining height face, where the air leakage is large, and large scope of spontaneous fire takes place easily. The position of spontaneous combustion fire in large mining height goaf is often high, and the temperature of the fire also very high when the spontaneous fire is monitored, so it is difficult to extinguish fire with general technology. In 2019, a large-scale spontaneous combustion occurred in the goaf of large mining height working face in Hongqinghe Coal Mine. ABT-Q type efficient composite fire-fighting materials and pneumatic matching fire-fighting equipment were adopted to successfully deal with the goaf fire. The practice shows that the material has high water absorption rate, good cooling effect, good performance of sealing air leakage channel, the supporting equipment with automatic ratio, high outlet pressure, easy to move and so on, and can meet the requirements of fire prevention and control.

Keywords

• fully mechanized coal face with large mining height
• spontaneous combustion
• fire prevention and control
• gel materials
• pneumatic grouting equipment