Rock collapse in Zigong, Sichuan has caused death. How to prevent secondary disasters?

At about 2: 30 pm on May 9, an unexpected rock collapse occurred in Xuyang Town, Rong County, Zigong City, Sichuan Province. After the accident, the local emergency plan was quickly launched. While evacuating the surrounding people, several ambulances were on standby nearby.

Rock collapse in Zigong, Sichuan has caused death.

All five people who lost contact were killed. The appeasement of the victims began immediately. As for the specific cause of the accident, it is still under investigation. It is understood that the collapsed houses were built on the mountain, and the live video showed that huge yellow stones were scattered everywhere. Some residents said that there was heavy rain in Rong County before the incident, and the rock collapse may also be caused by rain erosion.

Generally speaking, rocks are very stable and not prone to accidents, but they are not absolutely safe. Due to long-term weathering, the stability of the rock itself will be weakened, and if it encounters bad weather such as continuous heavy rain, it is prone to accidents. This may be the case whether the rock collapses or the soil collapses.

In addition, human intervention is also an inducing factor. When building a house, try not to choose the foot of the mountain. It is best to keep a certain distance from the mountain. At the same time, we should also pay attention to the situation of the mountains near our residence, and be vigilant in case of heavy rain and other weather to prevent danger.

Symptoms before landslide

The rock and soil at the toe of the landslide front appears uplift or uplift, forming radial cracks; Tensile cracks appear at the rear edge of the landslide and spread rapidly. Relaxation and small-scale collapse occurred in the rock and soil around the landslide. Surface and deep rocks are sheared or cracked by extrusion, and sometimes abnormal sounds appear.

Abnormal changes have taken place in groundwater dynamics, such as the sudden revival of springs that have been dry for many years, or the sudden drying of springs, and the sudden rise or fall of water levels in boreholes, wells and ponds. The geotechnical structure changes strongly, and the deformation of buildings intensifies. The house built on the mountain has cracks in the floor and walls, and the walls are skewed. There are biological abnormalities: livestock and poultry are frightened, mice are running around, trees are skewed or dead, etc.

Landslide prevention measures

If the landslide precursor is found, it should be immediately moved to a safe area, and the surrounding residents should be evacuated at the same time, and report to the village (neighborhood) Committee and relevant government departments in time. The location of disaster avoidance should be around the boundary on both sides of the landslide. In the case of ensuring safety, the closer to the original residence, the better, and the more convenient transportation and water and electricity.

Choose a safe area to build a house. Don't dig the toe of the slope at will, and don't dump earth and stone on the slope at will. Don't stay near dangerous rocks in rainy season, don't shelter from the rain, rest or walk in places where dangerous rocks protrude on concave steep slopes, and don't climb dangerous rocks.

During the summer flood season, pay attention to the local weather forecast, and don't enter the mountain valley in heavy rain or continuous rainy days. Be sure to stay away from landslide-prone areas, steep cliffs, hillsides with rolling stones and a lot of deposits, valleys and ditch bottoms, hillsides with sparse vegetation during heavy rains and long-term rainfall. When encountering heavy rain in the wild, you should quickly move to a safe highland, and don't hide or stay in low-lying valleys or steep slopes.

Landslide escape and self-help

Stay calm, quickly judge the correct escape direction, protect your head, escape to both sides of the landslide direction, and find a safe zone around as soon as possible. Run in the direction perpendicular to the rolling stones, not in the direction of landslides.

When you can't continue to escape, you should quickly hold fixed objects such as trees around you. Don't choose the place to avoid disasters on the uphill or downhill slope of the landslide. After the landslide stops, it should remain in a safe area to avoid secondary distress caused by continuous landslides.