Xiaoheita has an idea, but the feasibility remains to be determined. She did not explain in detail to Kekuo University, but said that she had a solution. So she entered the city with Kekuo University and reported to Yamauchi Yoshiji that she hoped to call 20 powerful gold diggers. Yamauchi Yoshiji did not ask the reason and agreed directly. (I hope this boss doesn't think that he was discovering a big gold mine or something about increasing production, which is not easy to explain)

Then a miner and twenty people from Mashino Kinshan Nuggets were mobilized to the command of Xiaoheita. Xiaoheita knew that these nuggets were not ordinary miners, but were generally wealthy handicraftsmen. They usually responded to Daming's military service like the previous uncle Tsunara. Although they were not samurai, they were also among middle- and high-income people (of course, the powerful groups that directly occupied gold mines were different. Their leaders and parents were often famous samurai. After all, they were rich, miners, organizations and equipment, very

It is powerful). They also have the experience of digging out the water veins of the enemy city and attacking the earth dragon. (There is something very tragic. The Japanese call this method of siege, which is also called cave attack. It probably means to attack the city, but if you read the book, you will find that the word cave attack is read in Wu language. It is a bit disgusting part of the human body. Given that I am from Changzhou, Jiangsu, when I talk about the authentic method of siege of the city in the future, we will uniformly adopt the theory of earth dragon attack, the above.)

Xiaopingta took them to the boulder and asked them to try to dig deep into the opposite shore. It does not need to be solid and solid, as long as it can be able to penetrate the tunnel.

Yes, Xiaopingta's method is to dig a tunnel to form a relatively large space underground, and then try to destroy the tunnel. Under the huge pressure of the upper river and the boulder itself, they will automatically fall into the boulder excavated boulder, and the boulder will eventually sink deep, thus no longer creating hidden dangers, and the river channel will become calm.

The Nuggets first dug a deep pit of more than five meters down the river. Sure enough, the seepage was quite serious, the construction environment was very unfriendly, but it was barely able to operate. The soil was also relatively soft, and the support issues needed to be carefully considered and planned. Several Nuggets and miners discussed it repeatedly, and finally felt that they could do it.

After feasibility certification, the Nuggets felt that they could do a good job in construction, so with the coordination and help of Beihang University, they mobilized a large number of wooden boards and logs, and then recruited 100 water stocks to start the construction together.

Digging downwards and about five meters deep at the same time, and then digging together, Lianchuan will be ten meters wide. Although the river channel is wider due to the existence of boulders, it will not exceed fifteen meters. The total tunnel length is about thirty meters, and Xiaopingta has also gone down several times. It is true that the soil under the riverbed is soft and requires a lot of support, otherwise it is very easy to collapse.

Looking at the authentic tunnel ticking on the dripping water, Xiaopingta couldn't help but worry about the Nuggets and Water Stocks who were working underground. However, one Nuggets slapped a thick log to relieve Xiaopingta. He dared not say such nonsense as Wannian Prison (but some of us dared to say that there would be no flood in a thousand years), but it would be a problem for ten days and half a month.

Xiaopingtai thought about the fact that someone was digging a tunnel and was overhead, which might be hundreds of millions of kilograms or billions of kilograms. Now a stone above his head is only tens of thousands of kilograms, so there should be no problem. We are not leaders, so we don’t need to command experts, just listen to professionals. People say that there is no problem, so Xiaopingtai is not worried.

In less than ten days, the entire tunnel was penetrated. Xiaopingtai first estimated the location of the boulder, and then asked them to widen and deepen the tunnel with the estimated direction to ensure that the boulder can fall deep into the ground and not get stuck in the air.

Xiaopingtai consulted the Nuggets to ask for a way to quickly collapse the tunnel. The method is also very simple. Generally, when siegeing the city, the attacking party often suffers heavy losses for the tall city wall. However, through the tunnel, digging to the bottom of the city wall, then stop digging and trying to loosen the wall foundation of the city wall (if you encounter something like the Nanjing Ming City Wall, this project is too big. The foundation of the Nanjing Ming City Wall is made of stone several meters thick, which is really admirable), and then use better quality hardwood as temporary support. Finally, pile up firewood in half of the space, open a few vent holes above the tunnel to ventilate, and then use a fire to burn whatever city wall you have.

Therefore, the siege of caves has been used a lot since ancient times. In addition to destroying the city walls, it can also directly enter the city. Many generals can do this kind of local work, and it is a general siege technology that is not very secretive.

Now the original disadvantage has become an advantage now. The tunnel was afraid of water seepage, so dozens of lives would be explained to you at once. After all, you can't run underground even if you want to run.

However, the soil on the riverbed is soft and easy to collapse, which is extremely convenient. Xiaopingta, who is already going to destroy the tunnel. Now both sides of the tunnel are completely connected, and ventilation problems do not exist at all. Just consider destroying it as soon as possible.

The first step is to evacuate people. The evacuation of a large amount of straw and firewood was piled up before. Then add a certain amount of ignition aids, which is to sprinkle some oil or something. The main combustion point is below the boulder, hoping to quickly collapse the tunnel.

The fire quickly lit up. The weather is now very dry. The fire in the tunnel is constantly pouring in through the wind on both sides, stirring up flames, and it is very terrifying.

In just ten or twenty minutes, I saw a lot of bubbles starting to turn from the river surface, and slight waves appeared on the originally calm river surface. The ripples became bigger and bigger, and the water continued to stir the embankment left and right.

Suddenly, a series of dull sounds came, and the river water rolled all over, but after a few breaths, there was a loud bang.

The huge rock that originally occupied the center of the river suddenly subsided with the loud noise, and the river water made a loud thunderous sound. The entire ground seemed to have an earthquake, and it was shaking violently, as if it was a roar from the huge rock.

Even Yamauchi Yoshiji, who was in the mansion city, hurriedly avoided it, but as a burst of flapping gray fell, the entire earth returned to peace.

At the same time, even the river calmed down, and the originally turbulent river surface continued to flow downstream calmly as if nothing had happened.

Beika University, who was watching all this, stood quietly on the embankment and remained silent. A momentum of a man who could conquer nature was vigorously thriving. He ran over and held Xiaopingta's hand tightly, so excited that he couldn't speak, but just held Xiaopingta's hand tightly again and again.
Chapter completed!