But it didn't take long for them to laugh heartlessly before they suddenly realized that this was a big deal. The tunnel to come is blocked, and the tunnel to go is also blocked, this is really a blind fortune teller - blocked at both ends.

As soon as they thought of this, the three people who were laughing just now were immediately like ducks pinched by the neck, unable to make a sound.

Wu Ze hurriedly ran to the place where it had just collapsed with a flashlight to check, this look made Wu Ze feel very frustrated, the way back was blocked tightly, this large section of tunnel, the collapsed area was very large, and it was impossible to get through in a short period of time.

The retreat is gone, it seems that there is only a way to open up, I have just checked, in comparison, the tunnel in front is not too badly blocked,

So Wu Ze and the three of them turned back to the place where they had just dug the tunnel, and continued to dig, because of fear, Luo Fatzi dug very hard, so that he dug very fast, and the mud and sand that blocked the way there went down at a speed that could be seen clearly by the naked eye.

But slowly Luo Fat Man felt that something was wrong, and he began to feel very tightness in his chest, only to see that his face was pale, and his breathing began to be a little difficult.

"Ze...... Marsh...... Brother, I'm ...... Chest...... It's stuffy! Luo Fatzi said weakly to Wu Ze.

"Smack!" Wu Ze slapped himself hard in the face, and his face became extremely pale.

He helped Luo Fatzi to sit in the back of the tunnel, and whispered to Luo Fatty: "Fatty, you take a rest, with me, nothing can happen, you slow down the pace of breathing, it will be fine for a while!" "The chapter of 潶し言し格 intoxication has been uploaded

After finishing speaking, Wu Ze picked up the sapper shovel in Luo Fatzi's hand and dug it up to the thinnest place at the top of the tunnel.

At this time, Jiang Yan's face also turned pale, although Wu Ze didn't say it, but his actions also made her understand, they are now in a dangerous situation of blockage at both ends, the oxygen in this tunnel is insufficient, Luo Fatzi dug hard just now, and the lack of oxygen supply caused him to have chest tightness and difficulty breathing.

After Jiang Yan understood, she also walked over and sat side by side with the fat man, holding the fat man's already weak hand with one hand, slowing down her breathing speed as much as possible, hoping to reduce the consumption of oxygen in the air.

The Grim Reaper was struggling with the sapper shovel in Wu Ze's hand, only to see Wu Ze digging towards the top of the tunnel with a shovel, and while digging the soil non-stop, he also slowed down the rhythm of breathing.

Wu Ze kept pushing inward with one shovel, two shovels, and three shovels, and Luo Fatzi's face slowly turned purple, and the hand holding Jiang Yan began to become more weak.

At this time, with a "bang", the sapper shovel in Wu Ze's hand penetrated the tunnel and blocked the sediment, and a stream of fresh air suddenly rushed into Wu Ze's nasal cavity and rushed to his lungs.

Wu Ze immediately threw away the sapper shovel in his hand, quickly went over to help Luo Fatzi, who was already difficult to breathe, quickly helped him to the vent, and then quickly turned around, helped up Jiang Yan, who was about to be unable to support her, and moved her to the vent with half a hug and half a hug.

The three of them just lay on this vent, greedily breathing in the fresh air, not wanting to move.

The air is a thing that I can't see, touch, feel its existence, and I don't have any concept of it at all, I don't care if I have it, I don't care if I don't have it, but when I can't breathe one day, I know how uncomfortable the taste of lack of oxygen is.

Just now, Wu Ze and the others just didn't realize the problem of lack of oxygen, which almost caused them to collectively suffocate to death, as long as this ventilation hole is opened in a few minutes at night, the consequences will be unimaginable.

Wu Ze slapped himself just now, because he blamed himself for forgetting such an important matter? In the method of determining whether the air is sufficient, the most commonly used method in the inverted bucket world is to use a candle to light a candle to see if the candle can burn normally, and then determine the oxygen content in the air according to the degree of burning of the candle.

At first, when I entered the tunnel, I didn't care about it because the tunnel entrance was large enough and the air circulation was no problem at all. And the collapse of the tunnel just now came too suddenly, which made Wu Ze not think about this aspect at all, until Luo Fatzi caused chest tightness due to heavy workload, which reminded Wu Ze of this fatal problem.

Fortunately, they finally let them survive, but this is not the end, because when Wu Ze dug the ventilation hole just now, in order to save his physical strength as much as possible to reduce his own oxygen consumption, he just took a look at the blocked place to ventilate, and the tunnel was not completely opened.

The next job was to dig out an escape opening that would allow people and backpacks to pass through, so when they had recovered their strength, they had to dig a hole.

After resting for about ten minutes, Luo Fatzi, who had already recovered his strength, picked up the sapper shovel on the ground and dug it hard.

"Damn, just now the fat man almost died before he got out of the school, I'm digging, I'm digging, see if I can't dig through you!" Luo Fatzi shouted as he dug back, he was now more energetic than the mud and sand blocking the tunnel.

"Fatty, dig slowly, don't push too hard, you see, it's almost unsupportable, be careful." Wu Ze loudly admonished Luo Fatzi while observing the situation in this tunnel.

"Slow down, slow down, wait, fatty, you stop first!" Wu Ze commanded.

He saw that this situation was a little wrong, and quickly told Luo Fatzi to stop.

I don't know how many years this place has collapsed, and the entire collapsed soil has been compacted, so when I dug the vent just now, because I only dug a small hole, and it was dug near the top, it had no effect on the bearing capacity of the entire blockage at all.

But now if you want to drill through a big hole, it will inevitably affect the load-bearing capacity of the collapse, if the place where the hole is dug can not be supported, it may lead to the collapse of the whole tunnel again, and then the amount of work will be large, and no one dares to guarantee that they can dig a ventilation hole again, and the danger is still with them.

"Jiang Yan, you take off your backpack and stand with me, the two of us use the backpack on top, and you tap it below, fat man." While commanding, Wu Ze unloaded his backpack and pushed it to the top of the hole dug by Luo Fatzi just now.

Wu Ze is planning to use the backpack as a baffle, and he and Jiang Yan will use it as a bracket, so that the hole dug by Luo Fatzi will not collapse all at once.

Luo Fatzi lightened the movements on his hands this time, for fear that if he used too much force, the whole wall of sediment would be dug up, just watching Luo Fatzi slowly dig in, and then Wu Ze and Jiang Yan slowly used their backpacks to push in, and the three of them tacitly cooperated to push in little by little.

I only heard a "click", and as the sediment fell quickly, a dark hole was revealed in the collapse, and the entire blockage was dug through by the fat man.