What caused the collapse of mountain roads in Beichuan, National Highway 347 to be interrupted?

As we all know, Sichuan is one of the areas with frequent landslides. On the morning of September 13, 2020, a large area of mountain body indirectly collapsed in Guanyinge section of National Highway 374 in Mianyang, Sichuan, with a landslide area of 1000 square meters. Now the road is completely interrupted and continues to collapse. Rescuers arrived in time to implement closed traffic control. The time for the road to open to traffic has not yet been determined. Fortunately, there were no traffic accidents and no casualties in this disaster. So what caused the mountain collapse?

Sichuan is dominated by mountains and basins, with rugged terrain, undulating terrain and large slope. The mountain is mainly limestone, which is easy to be eroded. Moreover, Sichuan is located in the earthquake zone, and many earthquakes lead to loose mountain geology and easy to collapse. Moreover, Sichuan is located in the subtropical monsoon climate zone, and the precipitation is mainly concentrated in the summer of heavy rain and heavy rain; This year, affected by the El Niñ o phenomenon, the rainy season has been prolonged, and it has been raining continuously in many areas in the south, and it has also been raining for a long time in Sichuan. The surge of water between mountains causes rain and streams to wash the surface, and causes geological disasters such as landslides, collapses and mudslides. Therefore, there will be a mountain collapse in Beichuan, National Highway 347.

When we encounter a landslide, we should first keep calm, don't panic and run away. We should choose to escape on both sides of the landslide-prone places or perpendicular to the rolling stones. Never choose a place to avoid disasters above and below landslides and collapses, and never run from one landslide to another without a comprehensive investigation. When there is no time to hide, take off your clothes and wrap your head, and then quickly hide under a solid object. If you are out of danger, please call the police at the first time and explain the time and place where the geological disaster happened. Don't act rashly and wait for rescue quietly. After receiving the rescue, government departments should broadcast the location and situation of the disaster in time, and appeal to the public not to rush to the incident site to avoid secondary injuries.