Moreover, because the underground river and karst landscape are located in the unfathomable but crystal clear river section, this winding and secluded "exciting feeling" has also become the reason to attract diving enthusiasts to dream of punching in.
On June 5438+065438+1October 65438+May, a group of five people from a diving club in Nanning, Guangxi, went diving in the skylight of Taohua jellyfish in Guangxi. After four people got into the water, people waiting for equipment on the shore had no time to wait for people to land.
/kloc-the diving challenge that started at 0/2: 05 turned out to be the last moment of one of the female divers' lives! Her body was salvaged six days later.
The diving accident in Guangxi has once again brought the extreme sport of "diving" into public view.
As early as 20 1 1 year, people accidentally discovered a rare freshwater creature-peach blossom jellyfish in this karst terrain surrounded by mountains and waters.
Peach blossom jellyfish is a veritable "living fossil", which has high research value and ornamental value. It is also a species formed in the process of biological evolution, and its status is no less than that of giant pandas.
Based on this discovery, it is named the first skylight of Peach Blossom Jellyfish and the second skylight of Peach Blossom Jellyfish, as well as the third skylight and the fourth skylight, which are distributed within hundreds of meters. They are connected by underground rivers, making the scenic spots endless and becoming a must for diving training enthusiasts.
Not only diving enthusiasts, but also the karst terrain on the ground has attracted countless tourists. Towering and towering, a water landscape, water caves everywhere. People have to be fascinated by it, and in the waters of Dongsi Village, not only the water scenery is pleasant, but also the water of several underground rivers "skylights" connected by underground pools is clear.
The water is clear, but it is bottomless. Even now, there is still no specific data on the depth, and the diving space in the cave is narrow. The underwater terrain here is extremely complex, which is not only an adventure for divers, but also a challenging journey and a dangerous place.
After all, scuba diving has its limitations. Diving in such a space is very exhausting. Once there is an accident such as poor visibility, the chance of survival is very small.
In the season of the incident, the skylight visibility of the peach blossom jellyfish is not good, and it is not an experienced diver, so the risk factor is very high. The so-called cave diving rescue can save the living, even if the body is searched and rescued, it is very difficult to complete the task in this highly dangerous cave.
On June 5438+065438+1October 15, 2020, an alarm was received in Lan Qi, Du 'an, and rescuers began to take action. Search and rescue work was carried out that night, and they initially concluded that the only survivor might be in the air room in the cave.
According to the principle of air pressure, in this special underwater karst terrain environment, when water fills the cave, a space filled with a lot of gas may appear. If there are divers in these places, there is still a small chance of survival.
Looking for an air chamber. number
The rescue operation became an operation to salvage the remains of the victims. On 19, the diving robot arrived and found the remains of the victims at the depth of 140 meters.
According to the record of the diving watch, the depth was repeated, but at the end of 22 minutes, it was stuck on the slope with a depth of 14 1 meter and did not continue to fall. Blue sky rescue judged that the diver should have been killed at this time.
"Because of the complex terrain, the whole is hourglass-shaped. The upper part has many eaves, cracks and dozens of branches, and the bottom of the lower part is between 1 10 and160m.
At the beginning, the proposed scheme is that cave divers team up to do carpet inspection on the upper part, including all branches, and at the same time mobilize professional ROV (Underwater Remote Control Robot) to search in the bottom area as soon as possible, and the divers can salvage after finding it.
That night, due to various factors, the ROV operation engineer expressed uncertainty about whether the salvage could be successful. At the same time, because of the depth and time, a large depth puncture is needed, and it is impossible for ROV to complete the puncture. "
To put it simply, some people think that it is too risky to salvage with divers, so it is suggested to salvage with ROV, that is, diving robot.
Every time the water depth increases 1 0m, the air pressure increases1atm, and the depth of140m is about 15 atm. If the body is directly brought to the surface of the water, the air pressure will change from 15 atmospheric pressure to one atmospheric pressure, then the gas volume in the human body cavity, such as the stomach, will expand by 15 times and explode directly.
In order to let out the expanding gas during the rising process, it is necessary to pierce the relevant parts of the remains with sharp tools, so as to maintain the integrity of the remains.
This is an impossible task for diving robots and can only be done by divers.
After coordination, the diver makes a soft connection between the descending rope and the ROV cable. After ROV finds the target again, connect and lock it with small buckle, and then close it. Then the diver tries to find the target along the descending rope and cable and bring it back.
However, the search and rescue process was not smooth. When the search and rescue personnel reached the bottom of the descent rope, they found that the rope was not tightened and loosened for more than 50 meters. They swam along the rope for 10 minutes and still did not reach the end of the rope.
Because it was more difficult than expected, the search and rescue personnel unanimously agreed that Qi Xin must work together to implement the plan smoothly the next day.
But on 2 1, there was a new change-the first divers were told when they arrived at the scene.
ROV suddenly decided to try to forcibly salvage without informing his family and obtaining the consent of the on-site commander. After several turns, I finally decided to continue the rescue and salvage according to the established plan yesterday.
"Except that the final depth exceeded expectations, except that the visibility was really poor, except that the target actually hung horizontally on a steep slope of more than 70 degrees, so that the salvage procedure had to be temporarily changed to underwater, and everything went smoothly. The target was fixed on the falling rope and punctured, and was finally salvaged ashore. "
At this point, the Chongqing female diver who drowned on 15 was finally salvaged on 2 1.
1 1 15 diving in Guangxi, 140 meters away, one person died, and the dead finally rested. But as a warning, the "abyss of ignorance" is more terrible than the "bottomless pit"!
If you love diving, on the one hand, you should know how to live in harmony with nature and be able to cope with the occasional "mischief" of underwater creatures; On the other hand, divers need to make judgments according to the environmental conditions and their own specific conditions, decide whether to try diving, and strictly abide by the diver's code, dive within the scope stipulated in their own diving licenses, do not go to strange waters, and implement the diving companion system.
Let's learn to nip in the bud in order to keep the fate with the world landscape. ...