What are the precursors of mountain collapse?

On August 28th, 20 17 10:40, a mountain collapse occurred in Dashujiao Formation of Bodhisattva Community, Zhangjiawan Town, Nayong County, Guizhou Province. As of today 16: 00, 3 1 person has been searched and rescued at the rescue site, among which 23 people were killed, 8 people were injured, and 12 people are still missing.

Mountain collapse, landslide precursor 1, cracks regularly arranged in the middle and front of the hillside.

At the foot of the hillside, the soil suddenly swells.

3. The floor and wall of the house built on the hillside are cracked and the wall is skewed.

4. On the hillside, the dry spring suddenly comes back to life, or the spring suddenly dries up and becomes turbid.

5. Animals are frightened, trees wither or skew, and so on.

Landslide can be divided into three stages: creep deformation stage: mainly slow, uniform and small amount of subsidence or slip, cracks appear on the slope, and the trailing edge is gradually pulled apart, lasting from a few days to decades.

Rapid sliding stage: sliding surface and cutting surface have been formed, and various landslide forms have appeared one after another. The fast sliding stage lasts for a short time, generally about several minutes to tens of minutes, and the fast sliding stage lasts for several meters to tens of meters per minute or even tens of meters per second.

Gradual stabilization stage: under the action of self-weight, the earth and stone of the landslide gradually become dense, the surface cracks are closed, the seepage at the front becomes clear, and the landslide tends to be stable, but if new inducing factors are encountered, deformation and failure will occur again.

Emergency methods for field mountain collapse 1. When you unfortunately encounter a landslide, first of all, be calm and don't panic. Panic is not only a waste of time, but also a possibility of making a wrong decision.

2. Look around quickly and evacuate to a safer place. Generally, except for high-speed landslides, it is possible to escape from dangerous areas as long as you act quickly. When running away, the best direction is to run in both directions. It is dangerous to run up or down the slope.

3. Never choose the place to avoid disasters on the uphill or downhill slope of the landslide. Don't run from one danger zone to another without a comprehensive investigation. At the same time, we should obey the unified arrangement and not choose our own route.

4. don't panic when you encounter a high-speed landslide that you can't run away. Under certain conditions, such as when the landslide slides as a whole, keep still or quickly cling to fixed objects such as trees around you. You can hide under solid obstacles, or you can squat in ridges and trenches. Pay attention to protect your head and wrap it in clothes. It is an effective self-help measure.

Under the condition of ensuring safety, the closer to the original residence, the better, and the more convenient transportation and water and electricity. Don't run to the landslide when you escape. Don't be at a loss, roll with the landslide.

6. Once suspicious landslide activity is found in the landslide danger area that has not yet landslide, it should be reported to the neighboring villages, townships, counties and other relevant governments or units immediately.

7. In case of landslide, it is easy to cause personal injury. When you are injured, you should call for help "120". "120" is the telephone number of the national unified emergency center. In the event of major disasters, accidents, severe trauma, acute poisoning and emergencies, people should immediately call "120" for help, and seek help from the emergency center, and at the same time provide necessary on-site rescue for the wounded or patients.

8. How to rescue people buried by landslides? Only by mastering the correct rescue methods can people and things be rescued quickly. The key point is: drain the water at the rear edge of the landslide. Dig from one side of the landslide. Save people first, then save things. In addition, don't go home to check the situation immediately after the landslide stops. Because landslides will happen continuously, they will rush home, thus being harmed by the second landslide. Only when the landslide has passed and your home is far from the landslide can you go in.

Note: If floods, mudslides and landslides are fierce and powerful, don't panic, stay calm, stay away from disasters and avoid danger is the best disaster prevention method. Before you go to the valley and flood-stricken areas, you must know the recent weather conditions, weather forecast and geological disaster meteorological forecast in the next few days in advance. If it happens to be bad weather, don't go in a hurry.