What is the main purpose of applying rock dust in mines?

The primary purpose of applying rock dust in mines is to neutralize the combustibility of coal dust. Coal dust, when suspended in the air, can create a highly explosive atmosphere if ignited. By introducing rock dust into the environment, it helps to dilute the concentration of combustible dust particles and increase the overall mass of dust in the air, which acts to curb the potential for an explosion. The rock dust particles are non-combustible and help in reducing the likelihood of ignition and subsequent fire hazards.

In addition, rock dust can also aid in electronic monitoring systems within mines, which rely on air quality and dust concentration levels. The main goal of using rock dust is to enhance safety by minimizing the risk of coal dust explosions, a critical aspect of mining operations where flammable materials are consistently present.