An explosion occurred on a road surface in Wuhan. Why does underground methane cause an explosion?

Introduction: On May 20th, an explosion occurred on a road surface in Wuhan. At least two passers-by were killed in the explosion. After the explosion, the relevant departments also rushed to the scene in time, and the injured were also taken to the hospital for rescue. At present, there is no clear investigation result on the cause of peasant explosion. Judging from the scene, the explosion was probably caused by underground methane.

1. An explosion occurred on the road surface in Wuhan, which blew up the asphalt on the ground. The reason was that the construction workers were working beside the manhole cover, which caused the underground drainage pipe to explode. Four people were injured in the explosion. They have been taken to the hospital, and their lives are not in danger. Officials also said that there was no natural gas near the manhole cover, which was not a natural gas explosion. The specific cause of the explosion is still under investigation. Although there is no specific cause of the explosion, everyone guessed through the scene that it was caused by underground methane.

Second, why does underground methane cause an explosion? In fact, methane is ubiquitous in our daily life, not only in underground pipelines in rural cities, but also in a large amount of methane. Biogas is a kind of mixed gas, which contains a lot of gas, because the sewage in underground water pipes contains microorganisms, which will produce biogas under the action of microorganisms. When mixed with flammable objects in the air, this biogas will become flammable and explosive. Once there is a fire source, it will immediately cause an explosion, and this explosion is very destructive. The explosion occurred on the road in Wuhan, probably because there was methane in the sewer, and the construction workers accidentally caused a flame during the construction, which led to the explosion.

Third, how to avoid methane explosion in places where methane may exist, try not to have a fire source, and don't test out of curiosity. Sometimes you can see in the news that some children throw firecrackers into the sewer out of curiosity, and then the firecrackers explode. This operation is absolutely impossible. Where there may be an early stage, we must try our best to avoid the supply of goods and not cause an explosion.