I thought I was still Long Aotian

The two discussed various details, and then Yuen Long took Shui Hua to the construction site of the carrot headquarters to see the situation on site.

The prototype of the headquarters has already been built, and the engineering project manager Asen is discussing the ventilation of the underground facilities with Captain Hong of the neighboring weapons group.

These two used to be the project managers of the Carrot Headquarters. One was in charge of daytime engineering and the other was in charge of nighttime engineering. They had never met before. After the accident of the former project manager of Weapons Group, Captain Hong was transferred to the next door to take charge of the work.

Yuen Long greeted them, took Shui Hua to look around, and decided on the location of the base station.

Yuen Long was pointing to the various floors of the headquarters building, asking about the Shuihua signal conversion module, when suddenly there was a muffled sound under his feet, and the ground shook slightly.

Shui Hua was startled, she couldn't stand still, she was about to fall, and Yuen Long grabbed her wrist.

Shuihua: "An earthquake?"

Sensing the surroundings, Yuen Long shook his head after a while and said, "It shouldn't be. If it is a seismic wave, it will radiate to the surroundings, and it is continuous. This is only one time. It seems that the epicenter is very close to us. It should be caused by something exploding or hitting at a high speed. Shockwave."

That captain Hong was ordered by his superiors to open up the underground part of the weapon group and the carrot headquarters. Yuen Long guessed that he was responsible for this little accident.

Yuen Long's analysis was straightforward, and Shui Hua believed him, "Shall we go and see what's going on?"

Yuen Long nodded, and led Shuihua towards the weapon group, and happened to meet Captain Hong and A Sen on the way.

Captain Hong: "Mr. Yuan, something went wrong. Our excavator hit a big rock, and the nose of the excavator was deformed. Some staff members got stuck inside and couldn't get out."

Yuen Long immediately followed their footsteps and ran to the construction site of the Weapons Group next door.

Seeing this, Shui Hua also followed.

Underground laboratories, also known as hard rock laboratories, generally use abandoned mines, tunnels or newly opened roadways. In addition to thermal experiments, radiation research or other experiments are carried out at a depth of about 800-2400 meters.

The Ordnance Group will not conduct radiation research in the city, but when it comes to some special experimental needs, they still set up the first phase of the laboratory, [-] meters underground, and arrange the underground facilities of the carrot headquarters to be [-] meters away. the next place.

When they arrived in Yuen Long, all the personnel working underground had evacuated, and the engineering technician was holding a wireless walkie-talkie, shouting to the workers who were stuck below, asking about their casualties.

"We are all in the control room. Guo Xiang and Huang Zhian were slightly injured. The others... are fine. The electricity is cut off. It's dark down there. The main control room is intact, but it's not ventilated. I don't know... the oxygen can How long will you hold on?" Intermittent replies from the trapped people came from the intercom.

Yuen Long asked Captain Hong: "How many people are stuck below?"

Captain Hong: "There are 5 people, the oldest is 42, and the youngest is 26."

Engineering technicians were coordinating the installation of underground backup lighting. Yuen Long asked Captain Hung: "What is the structure of the tunnel excavator? Do you need to call fire and ambulance?"

Captain Hong shook his head: "The underground structure here needs to be kept secret, and the less people know the better, we can only handle it ourselves. As for the structure of the excavator... Yuan Boss, wait a moment." After speaking, he called an engineer and asked He draws a simple structural diagram of the equipment.

"Look, this is a rotary knife in front. The excavated soil and gravel will be sent out from the spiral conveyor belt below. The main control room is here. Because there is an air intake device, there is no oxygen addition chamber." Captain Hong frowned. , and continued: "Our preliminary judgment is that the impact just now damaged the air intake pipe, and the backup power supply has not been connected properly, so we cannot break open the bent pipe."

Water birch leaned forward and looked at the simple diagram of the equipment with them. He had never seen this kind of tunnel excavator like a sandworm. If a person can sit in it and drive it, the equipment must have a diameter of at least More than 3 meters.

Yuen Long nodded: "Two options: first, you call the demolition team, I will go to the factory in Pingfu Village to pull a graphene battery, quickly connect the power supply, and demolish the ventilation pipe, but the underground excavation is already very difficult. It is too deep, and it will take some time for the demolition team to climb down; second, I asked people to drive a few multi-purpose engineering vehicles to dig up the soil layer directly from above. This will also take some time, but this plan not only You can give them oxygen and get them all out quickly."

"Excavate all the soil layers?" Captain Hong knew that there were many advanced equipment in Yuen Long. He didn't believe in Yuen Long, but he was more worried about the safety of the trapped people below. "Mr. Yuan, those multi-purpose engineering vehicles of yours can Dig a hundred meters deep in 10 minutes? The main control room is not big, I guess they can only stay for 10 minutes."

Yuen Long patted him on the shoulder to comfort him: "An adult breathes about 15-16 times per minute, and based on the calculation of 30 cubic meters of fresh air per hour, one person needs 0.5 cubic meters of air per minute, and five people need 5 cubic meters of air per minute. .And your main control room is cylindrical, with a volume of 2.5 cubic meters, so to be precise, we still have 62.83 minutes."

After listening to Yuen Long's analysis, Shui Hua also became anxious.

In 25 minutes, the demolition team was still in the city center, and even if they could make it there, they would have no time to dismantle the ventilation pipes!

Captain Hong was not comforted at all, but became even more nervous. He said with a bitter face, "Mr. Yuan, can you save them all by choosing the second plan you mentioned?"

Yuen Long: "I can't guarantee it. It depends on the soil quality. If there are no rocks above the main control room, our multi-purpose engineering vehicle should be able to drill deep ventilation wells on it."

Captain Hong gritted his teeth: "Then try a multi-purpose engineering vehicle. Saving people is the most important thing. I don't have time to grind."

Fortunately, the construction site was close to the factory in Pingfu Village. A phone call was made from Yuen Long. The factory manager and director Su brought 5 newly developed engineering vehicles.

The engineering vehicle is very long, with 6 large wheels at the front and rear, and a row of tank crawler wheels in the middle of the body. When these engineering vehicles drive to the construction site, they start to deform like Transformers.

The first three become drilling excavators, and the last two become conveyors for transporting soil.

Everyone at the scene opened their eyes wide in surprise.

The people in the radish factory had no time to talk about it. Under the command of Yuen Long, they drove the construction vehicle to the designated location.

The first one is responsible for vertical drilling and opening the airway, the second and third ones are responsible for cleaning out the excavator head, and the latter two are responsible for conveying the excavated soil.

These engineering vehicles are very powerful, especially because they are the first drilling excavators. The drill bit can be grafted longer. Once the drill bit goes down, it is about 10 meters. After the soil is brought out, the next shovel is started.

Time was running out, and everyone waited with bated breath.

1 minute... 3 minutes... 5 minutes...

No one spoke, only the roar of machinery.

10 minute... 20 minutes...

Carloads of soil were pulled out, and the people on the side of the vertical drilling shouted: "It's clear, it's clear, let's get out of the drill."

At the same time, the voice of the trapped person came from the intercom in the hands of the engineering technician, "It seems to be windy...the air is getting better."

Everyone cheered.