Why are there so many sinkholes this year?

Hello! The causes of sinkholes are mostly divided into two kinds, most of them are collapse type (Guangxi Leye Tiankeng Group, etc.), and the rare one is erosion type (Chongqing Wulong Houping erosion Tiankeng Group, etc.) The formation of sinkholes must meet at least six conditions at the same time: First, the limestone layer should be thick.

Only a sufficiently thick rock formation can provide enough space for the formation of a sinkhole. Second, the water level of the underground river should be very deep. Third, the thickness of the gas-containing zone (gas-containing rock formation) should be large.

Fourth, the rainfall should be large, so that the flow and power of the underground river are large enough to wash away the fallen stones. Fifth, the rock strata should be flat. If you look at the cliffs around the sinkhole, you can see that the rock formations are parallel to the ground, like layers of stone slabs piled up around them, and only such rock formations can collapse.

Sixth, the earth's crust should be protruding. The movement of the earth's crust will power the collapse of rock formations. Until 2010, 78 sinkholes have been identified, of which 2 3 are located in China, and of course, the investigation, identification and debate about sinkholes have not stopped.

Karst. Karst landforms are widely distributed in the world, accounting for about 10% of the total area of the earth, and Chinese karst accounts for about the total area of the country, mainly distributed in Guizhou, Guangxi, Chongqing, Sichuan, Yunnan, Hubei and other provinces and regions in the south, which is the world's largest and most concentrated karst area, but the term karst was born in Slovenia.

In addition, this year's climate disasters are more serious than in previous years, with heavy rainfall, typhoons, **, and falling groundwater levels all causing sinkholes.

Hope it helps you and thank you!

We already have about 20-30 sinkholes in the Huabu circle, all of which are called "leaks", and they all say that there is no bottom, and if you fall into it, you can't get out.

A sinkhole is a type of karst negative terrain developed in carbonate karst areas with steep walls, depths and calibers of up to hundreds of meters, with a huge volume and a bottom connected to an underground river (or there is evidence that the underground channel has migrated). Before 2001, it had been used as a special case of karst funnel, and in 2001, Chinese scholars officially proposed to name this karst landform "sinkhole".

In the early 80s of the last century, geologists discovered the "Big Rock Bay" and "Little Rock Bay" in China, which was the first large-scale funnel landform discovered in the world.

Chinese and French experts recently carried out the first joint scientific research activity around the geological resources of Donglan, probing underground caves up to kilometers long and discovering a sinkhole with a depth of more than 400 meters, which is rare in China.

Jean Portasi, the leader of the Sino-French joint scientific expedition team and the secretary general of the French Cave Exploration Alliance Association, said that after 8 days, the Chinese and French scientific expedition personnel jointly carried out scientific exploration activities in 12 caves (sinkholes) in Wuzhen Township, Simeng Township, Lanmu Township and other places in Donglan County.

We all know the story of dripping water through stones, a drop of water can drip through the stone for a long time, so can you imagine what will happen after a long time in the underground with surface water and deep water washing? That's right, you can break out of the sinkhole.