What is a primary hazard associated with methane in coal mines?

What is a primary hazard associated with methane in coal mines?

• A. Poisoning
• B. Asphyxiation
• C. Explosive hazard
• D. Corrosion

Answer: (C)

Methane in coal mines is primarily an explosive hazard. It forms flammable mixtures with air, and within about 5 to 15 percent methane by volume, a source of ignition can trigger a powerful explosion that can propagate through mine workings. That’s why ventilation and continuous gas monitoring are central to safety, keeping methane well below the explosive limit and detecting leaks early. Methane isn’t toxic in the usual sense, so poisoning isn’t the main concern, though very high concentrations can displace oxygen and contribute to asphyxiation. Corrosion isn’t a hazard associated with methane in mines.

Methane in coal mines is primarily an explosive hazard. It forms flammable mixtures with air, and within about 5 to 15 percent methane by volume, a source of ignition can trigger a powerful explosion that can propagate through mine workings. That’s why ventilation and continuous gas monitoring are central to safety, keeping methane well below the explosive limit and detecting leaks early. Methane isn’t toxic in the usual sense, so poisoning isn’t the main concern, though very high concentrations can displace oxygen and contribute to asphyxiation. Corrosion isn’t a hazard associated with methane in mines.