After some browsing, the guard accepted the letter of introduction, and the expression on his face had become respectful: "Vasili from China, welcome to the Kata mine production area!" Although I would love to let you in, it is the time for the workers to eat and change shifts, which is non-productive time and cannot go down the mine. If you don't mind, you can take a break in the guardhouse and wait about half an hour before entering. ”

Yu Dongfeng was a little happy when he heard this, and immediately said to Zhong Bai: "Then let's go in and rest for a while, I got up too early today, and I turned around again in the morning, I want to be a cat for a while......"

Zhong Bai turned his head and glanced at Yu Dongfeng: "You kid knows how to steal and play tricks......

After all, Yu Dongfeng was indeed more tired than himself after running in the past two days, so Zhong Bai let him rest first, and he proposed to the Ermaozi guard to take someone around the mine to understand the situation, and the other party agreed.

With Brown and Ricky, Zhong Bai and they walked into the mine production area.

This move is not a temporary initiative of Zhong Bai, but because it is necessary to install these hydraulic pillars today, it is also very necessary to inspect the actual environment of the mine some time in advance.

Like most underground coal mines, the layout of the Kata mine is relatively standard: a mine road into the mining area, a mining layer, and a tunnel with track extension......

These familiar scenes made Brown and Ricky finally get back some of their working feelings, after all, reading materials in a small hotel room every day is not the normal work of French mining engineers!

At least the excavation machinery that appears in the field of vision at the moment looks quite good, they are all heavy machinery produced in Ukraine, which is slightly different from those produced in Europe and MD, but it aroused the interest of the two.

"Ricky, they're bigger than the French ones...... Brown exclaimed, pointing to a crawler excavator.

Ricky looked very calm: "Isn't this nonsense, what kind of thing made by the Soviet State is not big and stupid?" It's normal that this thing should be twice as big as the RB man-made thing......"

Zhong Bai didn't talk like the two of them, but after visually measuring the diameter of the main mine, he said, "Their diameter is a little inconsistent with the data?" I feel like the diameter is a bit big, more than 12M, right? ”

"Really?" When Brown heard Zhong Bai say this, he also shifted his attention, gestured in front of him with both hands, and converted it according to the proportion of space and distance, and nodded: "It seems to be a little too big, why don't we go over and measure it?" ”

"Hmm. This has to be tested. Zhong Bai nodded in agreement, so the three of them took the tape measure and walked to the entrance of the main mine dozens of meters away.

Why did the change in the diameter of the main mine cave attract Zhong Bai's attention?

That's because, in general, the diameter of the main mine opening is often closely related to the diameter of the underground mine mining face.

According to a very simple truth, if the diameter of the underground mine mining face is larger, then the support force provided by the required supporting equipment will be greater.

Zhong Bai and the others only brought 20 DWX35-180/100X hydraulic pillars today, which is based on the previous query of the diameter of the main mine (12M) of the Kata mine.

In other words, if the diameter is calculated at 12M, twenty hydraulic struts of type DWX35-180/100X are just enough to support a mining site.

But now the diameter is obviously more than that, and there is a risk that twenty DWX35-180/100X hydraulic struts will not be enough!

Walking to the entrance of the main mine, the three of them took out a tape measure and after three high-precision measurements, they finally came to the diameter of the main mine mouth is 14.82M!

That's almost 10% of the original diameter!

If you want to go down the well today to try these 20 DWX35-180/100X hydraulic struts, the amount should not be enough.

Ricky immediately realized the problem: "Zhong, do you want Yu to drive them to get some back?" ”

Brown nodded slightly, agreeing with Ricky's suggestion.

But Zhong Bai didn't agree immediately, but shook his head and said: "No, the remaining products are still in the Udir factory, and it will be dark from here to the Udier factory, and it will be too late." ”

Ricky was dumbfounded: "Huh? So what to do? So today we will just give them away, and we will not go down to the actual test? ”

"Of course, it's time to go down to the well and actually test." Zhong Bai glared at him and said, "What do you want?" If we don't go down the mine to test the actual performance of the product, why do we have to drive to the mine for so long? Why don't you just give it to Director Tchaikovsky and it's over? ”

"This ......," Brown asked cautiously, "but according to this diameter, the required support force is obviously higher!" What if we don't increase the number of pillars and something happens? ”

Zhong Bai shook his head firmly and said, "There will be no accident." ”

After all, he was the inventor of this patented product, and since Zhong Bai said it so clearly, Brown and Ricky didn't say anything anymore, but they both began to worry silently at the same time.

But Zhong Bai was not afraid at all.

Because the calculation of the data by these two people comes from the information they provided to them before, that is, the standard data on the patent examination data.

But in fact, Zhong Bai knows that the standard data marked on the patent examination materials actually has certain reservations.

The actual support force of this batch of products, that is, the maximum value within the safety range, should be about 150% of the standard data.

This is also the common mode of thinking of industrial people in Huaguo in the previous life, that is, to leave room for themselves!

Of course, the mode of thinking of the Chinese industrialist was not widely known to foreign countries in the early 80s, after all, there was very little export to foreign countries.

I didn't explain what I said, Brown and Ricky were a little worried, Zhong Bai said in his heart This is also understandable!

Speaking of which, in the previous life, when the matter of standard data was mentioned, industrial people all over the world knew a joke, so they took the service life of a product as an example to explain it.

People say that things in West Germany are the most durable, because the Germans are the most rigorous and very conservative, so a device that they claim can last for 20 years, in fact, as long as you follow the normal use and maintenance procedures, then it can often be used for 40 years!

RB people are much more savvy, and they are well aware of a truth, that is, if the equipment is as durable as the West Germans, what can be done to upgrade it in the future? Is it that your new products can't be sold? After all, RB is known worldwide for its speed of technological innovation!

Therefore, an RB person claims that it can be used for 20 years, no matter how much you comply with the use and maintenance procedures, there will be no problems in the first 20 years, but in the 21st year, it will be a proper problem!

And what about the equipment of the Chinese people?

It is claimed that it can be used for 20 years, but in fact, it is often used in an overloaded environment, although there will be many problems after the 20-year limit, but the sewing can be used for another 3 years! And after you take it back, you can continue to use it lightly for a long, long time!

It's a joke, but it reflects three different design philosophies.

That is the industrial design of the Chinese people, and its real ability is definitely not as simple as the data on paper!