Don't think that Mars is a safe place, the vicinity of Mars is even more dangerous!

In the Earth's low-earth orbit, spacewalks are a common thing, but no matter what level of space orbit, under the protection of the Earth's magnetic field, it can effectively resist high-energy particles from the sun and the depths of the universe.

Mars is different, its magnetic field disappeared billions of years ago, only a small amount of magnetic field remains on the surface, and without a magnetic field covering the whole world, it cannot resist the energetic particles from the sun and the distant starry sky.

For the expeditionary fleet, high-energy particles are the second biggest threat after aliens, only the shell of the battleship can block them, the thin shell of the engineering ship plays a very limited role, and the power armor on the soldiers is not much stronger, and the short-term extra-ship work is not a big problem, but the long-term extra-ship activities are very dangerous.

As a very simple example, a supernova explosion in the distant starry sky will eject a large amount of matter, and some heavy ions that have lost their extranuclear electrons fly into deep space at a speed close to the speed of light, and these heavy ions can easily penetrate the human body, shatter the DNA in cells, and even if you don't feel anything at the time, you will become seriously ill afterwards, or even die from it.

Moreover, this thing can neither be detected nor predicted, and in order to resist heavy ions, the two ships have to stay in the way of the engineering boat at all times.

Heavy ions are only one direction of danger, and the ubiquitous space dust also threatens the safety of the team members all the time!

Ye Han didn't know much about this aspect of the situation, and secondly, he was so focused on the task that he didn't pay attention to this aspect of the situation at all, and as a result, an accident occurred on October 9, three days after the project began.

That afternoon, the No. 3 engineering boat was working at the designated location, and several members of the boat were in place, and everything was no different from before.

Several team members suddenly heard a crisp sound of "horn", and one of the team members screamed miserably, and a small hole was pierced in the torso armor, and blood gushed out like a fountain.

The air in the boat quickly drained in the weakening sizzle, and the flying blood beads drifted to the side and upwards with the air, and several team members immediately found the location of the hole and immediately blocked it with airtight plugs.

The air pressure immediately rose, but several team members didn't care about this, and immediately rushed to the side of the injured comrade-in-arms, only to find that the wounded person's liver had penetrated and the person had fallen into a coma.

The situation was urgent, and the team members did not have time to contact the Luzhou, so they immediately injected the wounded with hibernation, and then sent the seriously injured comrades back to the spacecraft as quickly as possible.

Because of the timely treatment, the wounded finally saved a life, but the crushed liver had one-fifth removed, which not only required long-term recuperation, but also was not suitable for continued stay in the Marine Corps.

At Ye Han's insistence, all the construction boats were stopped, and a comprehensive inspection of the No. 3 engineering boat was conducted, and the investigation found that the culprit was nothing more than a finger-sized piece of gravel.

Although the gravel is small in size, it is very hard, and the relative speed between it and Deimos is extremely high, and it happened to crash into the engineering boat, so there was an accident that first penetrated the engineering boat, then penetrated the power armor, and injured a team member.

What made Ye Han even more unbearable was that the investigation found that this piece of rubble was actually from Deimos!

That is to say, the gravel produced by drilling a few days ago turned around and smashed through the engineering boat, what kind of coincidence is there Ye Han is not clear, but he strongly urges that the protection of the soldiers be strengthened, and the same accident must not occur again.

Xu Moliang strongly objected, thinking that this was just an accidental accident, and the probability could not be smaller, even if everyone stood generously on Deimos, they would not encounter the same situation again, and there was no need to stop work to affect the progress.

But Ye Han thinks that there are two if there is one, Xu Moliang's statement has no basis at all, and if the same situation happens again, it is difficult to say whether he can save people back.

The team members were risking their lives to carry out the construction, if the safety was not effectively guaranteed, how could they complete the project on time?

In the face of the strong Ye Han, Xu Moliang had to compromise, and spent a day dismantling a batch of armor plate reinforcement engineering boats from the Luzhou, and the engineering boats resumed work one after another.

With the passage of time, the proficiency of the team members is getting higher and higher, and the error of the ground well is getting smaller and smaller, and after half a month, the soldiers finally hit the first ground well without deviation, and the drilling project has since entered the fast lane, and the ground wells that are hundreds of meters deep or even thousands of meters deep are completed one by one.

During the period there were also some small problems, equipment failures are commonplace, a drilling rig failure, the drill bit stuck in more than 70 meters deep underground, as a result of the drilling rig twisted the drill pipe, the broken drill pipe smashed on the engineering boat and bounced off, flew into the air and hit the Luzhou again, and finally did not know where to fly.

In another case, the fixtures of the construction boat failed, and the drilling rig was started and did not go into the ground, but almost overturned the construction boat.

There are also a lot of other large and small faults, but fortunately, it is not a big problem, and the spare parts on the Luzhou are sufficient, and the engineering boat can be repaired in the shortest possible time every time, and it has not affected the progress of the project.

Although the soldiers complained in private, when it was their turn to be on duty, they walked into the engineering boat without hesitation.

The team members all laughed at themselves and said that they had not touched the gunman for so long, and they would not fight in the future, and they would be able to make a fortune when they went home to dig wells.

Although the words are ridiculous, the actual situation is similar, the Marine Corps has completely turned into an engineering team, and all the procedures of drilling have been thoroughly understood.

Of course, this technology can also be used on Deimos, where gravity is negligible, and there is no danger of collapse no matter how well is dug up, even if the satellite is pierced.

In this way, Ye Han led his team to be busy for more than a month, and finally completed all the underground wells on Deimos in early November.

Although there are a large number of wells, only a small part of them need to be blasted with nuclear bombs, and the reason why so many wells are drilled is actually to shape the "ammunition"!

Ye Han was in a mess when he first knew about this, and he didn't understand what the relationship between the ground well and the shaping was, and after listening to Xu Moliang's explanation, he understood that many ground wells formed a weak separation layer around the "ammunition", so that the blasting separation layer was destroyed first, and the appearance of the "ammunition" could be maintained to the greatest extent and the ammunition could be avoided from being shattered by a nuclear explosion to the greatest extent.

The construction on Phobos is over, and the work on Phobos is about to begin.