The prospecting team was lucky, and after walking about five kilometres the next day, they found a suitable mining site.

After Yan Zheng chose a location, he asked the students to start exploring the pit around the center.

The tool used is the famous archaeological artifact - Luoyang shovel!

It is said to have been invented by tomb robbers, but it has since been widely used in archaeology.

It is used to drill holes for prospecting, and it is naturally a rare artifact!

The students were in high spirits, and after playing almost a hundred holes densely, they were stopped by Yan Zheng.

After observing the potholes in each area, Yan Zheng pointed out a direction and asked the students to continue their work.

After repeating this repeatedly, it took almost a day for Yan Zheng to determine the possible direction of this vein.

But after confirmation, he decided to open pit mining!

There is really no condition to build a large-scale coal mine, so we simply talk about open-pit mining for a decade or two, and no one will talk about environmental protection anyway.

He believes that in a decade or two, it is estimated that the coal mines in Liaodong and Vietnam will almost be used.

"Teacher, is it considered to have found a mine now?"

When Yan Zheng asked the soldiers to start clearing out the area, the tired students asked.

Yan Zheng nodded, took the coal made with the Luoyang shovel and said: "You have to remember that the distribution of coal seams sometimes has great differences, which is caused by geological movements, generally the larger the coal mine, the more likely it is to show the diversification of coal seam distribution!"

"And you see, we've found a suitable mining site here, which is actually a shallow area. However, these coals, which are not completely coalized, can only be regarded as medium-grade lignite. If you continue to dig down, there is a high probability that you will encounter high-grade lignite, as well as low-grade anthracite, sub-bituminous coal, and even high-grade anthracite! ”

"Then teacher, why is there a difference between the same coal?" Someone asked.

Yan Zheng smiled: "It's very simple, this truth is like burning charcoal, and the good charcoal should have a high degree of charring!" The lignite is the mineral coal with the lowest degree of coalification, its property is that the calorific value is relatively low, can not be used as coke for steelmaking, but can be used as fuel or fertilizer, the calorific value of intermediate lignite has gone up, but there are more impurities. The effect of coking will be greatly reduced. ”

"High-quality anthracite, on the other hand, is the finest coal mine, not only because it has a high calorific value, but it is also an excellent material for steelmaking. As long as we have a stable supply of anthracite, we can make more and better steel, build more machines, and in the future, we can use coal to drive machines, which greatly improves our productivity! ”

"When the teacher said about coal coking, is it to remove the sulfur in the coal?" One student asked, raising his hand.

Yan Zheng said with satisfaction: "You remember correctly! In the final analysis, coking is to let coal retain only the characteristics of fuel, and destroy other properties. The temperature produced by coal burning exceeds that of charcoal, so coal steelmaking is more trouble-free and more convenient! ”

The students all pricked up their ears to listen, and from these words, they quickly understood that coal mining has been related to the national economy and people's livelihood.

Deng Yong looked at the surrounding environment and suddenly asked, "Then teacher, our side is so remote, how can we collect the coal here?"

Yan Zheng said with a smile: "There is no other way, that is, rely on manpower, make a way out, and then get the coal out!"

"Dig with people?" Xing Wang was a little surprised and said, "Then you need a lot of people, right?"

"Well, the teacher plans to spend a year digging an easy road, and then he can pave railroad tracks to facilitate the export of coal!"

Such a large project made these students can't help but calculate, in their opinion, the manpower required is very huge, and it has far exceeded the construction of the road with the Yan'an River and the Beidai River.

"Teacher, didn't you say before that you have to do what you can? I think it's too big, you know, we searched for three days! A female classmate was worried.

Yan Zheng was silent for a while, and explained: "We have been looking for three days, but we are looking for it aimlessly, and it is stop-and-go, which naturally delays the effort, I estimate that this place is from Zhuqian Port, it should be a day's journey!" And let's plan the route, it will definitely be more reasonable! ”

"And...... And in terms of the use of manpower, the teacher and I have my own plan to ensure that this coal mine road will be built without consuming a single labor in Mocheng! ”

The students were all lost in thought, but the indigenous students quickly reacted, thinking that this time they would still have to capture a large number of prisoners of war and let them repair for Mo Cheng.

The indigenous students felt that this was nothing, and most of the prisoners of war they had seen were living well, but they had no status or dignity.

What they don't think is that this road is most likely the road of blood and sweat, and they don't know how many people will die tragically in the process of building the road, and they don't know how many people will dig out the coal shovel by shovel under bad conditions.

Although these coolies came from Japan, Yan Zheng still had to wait for the students to mature and the common consciousness of the Chinese nation was established before they would be exposed to this bloody and dark thing.

lest they be undeserved to the aliens.

After all, in this era, the rise is continuous colonial conquest, continuous enslavement and plunder, only in this way can we grab enough resources for future generations and get rid of the fate of life and death!

…………

The next day, Yan Zheng began to plan the road.

This kind of planning is not too technical, it is purely in the direction determined by the compass, through the zigzag planning, around some peaks.

In this way, the distance to climb is kept as short as possible, and the road can be built more gently.

In order to better plan this route, he deliberately climbed the highest mountain, and after determining the direction, he simply drew a map with pen and paper.

This map is not as accurate as the professionals have drawn it, but it does reveal a long ravine with a slight height difference, and this ravine connects many ravines.

According to Yan Zheng's assumption, as long as he is high on the side and takes advantage of this certain drop, he can bypass more than 30% of this mountain peak through a big C.

Definitely a best reference!

In fact, what Yan Zheng didn't know was that what he found was far from the main mine of the Lion's Head Mountain Coal Mine.

What he dug was only a part of the later Nanzhuang coalfield, and the specific location should be the sulfur pit in Miaoli District, if he wanted to dig higher grade coal, he still needed to go about five kilometers to the north, where there was the later Wuzhishan Coal Mine in Zhudong District.

However, in the Nanzhuang coalfield, there is also a sulfur pit coal mine, which is really convenient for Yan Zheng to mine in the early days.

Because with every kilometer you advance, the difficulty increases by several percent!

Therefore, the discovery of the sulfur pit coal mine has a certain inevitability in the accident.

In this way, Yan Zheng took the students to look at it while walking, and after determining the route, he nailed it down with a wooden stick, and then engraved Chinese characters and numbers to indicate how many piles it was.

When it is time to build the road, as long as you see the numbers on these sticks, you can understand whether there is a missing stick in the middle and whether there is an offset in the line.

This work makes the return journey also slow.

By the time I returned to Zhuqian Harbor, it was already four days later.

Before Yan Zheng could take a break, he found that Ashin and Zhang Xi were already waiting in Zhuqian Port.

…………

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