"I'll take a look at ......" Xu Xiuxiu had just made up for her written reading skills in Russian on the train yesterday, and although the handwriting was a little distorted Cyrillic, she still had a headache One word after another popped out of her mouth: "You...... ...... depicted This product ...... I know...... A Ukrainian ...... The machine factories in the east should ...... Can be manufactured...... It's called ...... Kharkiv ...... Red Star Machinery Manufacturing Plant. The contact details are given later. The name of the contact was Grokov. ”

"The name of this enterprise is Kharkov Red Star Machine-Building Plant, right?" After listening to Xu Xiuxiu's translation, Yu Dongfeng frowned and asked Demon Cardin.

"Yes, my friend told me the name of the factory on the phone, and he said that the specific contact information was on this piece of paper." Demon Cardin shrugged and said, "Mr. Yu, that's all I can do, as for the situation of this factory, I'm afraid you will need to contact each other yourself in the future." ”

"Thanks, that's enough." After hearing the other party's confirmation, Yu Dongfeng smiled again, stuffed the fax paper into his pocket, got up and made a "please" gesture, and said, "Then we should go and enjoy the great "Orfeo" together now." ”

……

After the end of the opera that night, Yu Dongfeng immediately photographed it by telegram to Zhong Bai, who was far away in Tiandu.

Of course, Zhong Bai didn't know about his telegram until the next morning, after the meeting.

Before seeing this telegram, Zhong Bai naturally came to the office half an hour early, and after Fu Chongshan arrived, the two offices of the technical department and the equipment department immediately held a brief discussion meeting.

In the small conference room, Fu Chongshan and Miao Lirong didn't say much, they mainly came to listen and express their attitudes.

The specific content is naturally that He Xianglei and Zhong Bai, who participated in the supervision of the supervision group two days ago and the supervision of the source city, put forward their own opinions.

“…… Generally speaking, the problem of insufficient pit timber is not only in the No. 2 sub-mine, but also in the No. 3 sub-mine we went to later. With the further increase of mining depth, the safety risk is also greatly increased, so my judgment is that even if the large cost of buying pit wood in a short period of time is increased, this measure cannot effectively improve the support strength and ensure that the production can be further increased. ”

He Xianglei's speech was concise and practical, and the shortcomings of the wall caving method on the equipment were clearly explained in just a few sentences.

This is exactly the same as Zhong Bai's judgment: that is, the problem is that the wall caving method is no longer suitable for this kind of continuous mining operations at a depth far beyond the previous one, and if the mining method is not changed, or the elements in the current mining process are greatly adjusted, it is basically an impossible task to talk about increasing production.

"That's my opinion, old man." Miao Lirong cleared his throat and said: "The effect that can be obtained by improving the equipment is very small, after listening to Director He yesterday, I basically think that with the current underground bauxite mine in Heyuan City has been very old supporting equipment, it is extremely difficult to increase the output to the level of the same period last year, at least seven million to ten million yuan must be invested, but this decision is not possible for our equipment department to make." ”

The meaning of Miao Lirong's words is also very clear, that is, if you want to meet the requirements of increasing production by replacing existing equipment, the investment is almost astronomical, not to mention the current financial resources of the mine itself, even if the provincial department or local bank wants to take the initiative to find ways and find funds for them, but in this situation where the effect is not obvious and the investment is huge, no leader will not judge the feasibility.

Therefore, the practice of not changing the core technology and only wanting to achieve the goal by updating the equipment is not feasible now, and Miao Lirong naturally denied the possibility of reporting this suggestion to Lu Xudong.

But in today's discussion meeting between the two offices, you can still take it out and talk about it, after all, it's not enough to just update the equipment, so what about updating the technology?

Fu Chongshan frowned and said, "This is indeed very difficult, Director Miao." Xiao Zhong also argues that it is not feasible to improve the existing technology to increase production, and that a new method of deep continuous mining must be rethought. I think that's right, Xiao Zhong? ”

Zhong Bai knew that his time had come, so he immediately nodded and said, "That's true. So on the first night I left Heyuan City, I seriously thought about a new deep continuous mining technology, and now I have a little idea. I have two schematic diagrams here, and then I will cooperate with these two schematic diagrams to tell you about this new method of 'single hydraulic support roof method'. ”

"Single hydraulic support roof method?"

Hearing this new term, the three people present couldn't help but ask at the same time.

"Yes." Zhong Bai opened the first section diagram as he spoke, and explained: "At present, the underground mining of their mines uses the standard process of blasting-caving-ore transportation-ore extraction, and this single hydraulic support roof method is the same, please take a look at ......."

“…… First of all, this method increases the width of the roadway from the original 40 to 60 meters to 100 to 120 meters, the width is larger, the shape of the whole tunnel is more regular, and it is more conducive to setting the reasonable explosion range of the blast hole......"

“…… The belt conveyor is no longer used on one side, but on both sides as the width of the tunnel increases, which can greatly improve the ore discharge efficiency......"

“…… The key to this method is that the collapse stress increases after the tunnel increases, which means that we need to use a larger force roof to withstand all this, and it is obviously unrealistic to continue to use ordinary pit wood, so I propose here to use a single hydraulic pillar, through a large number of single hydraulic pillars arranged to form an array, and the support system composed of them can perfectly bear the force required by the roof, so as to ensure the production of ore production......"

“…… This is an elevation drawing, we need three rows of single hydraulic pillars in each unit, a total of 30 in each row, a total of 90 in total, so as to ensure the safety of the collapse. ”

Zhong Bai opened the schematic diagram of the façade again, marked the single hydraulic pillar on it with a colored pencil, and a red dot appeared neatly in the middle of the schematic diagram, indicating the 90 hydraulic pillars.

Miao Lirong quickly understood Zhong Bai's train of thought and asked, "Section Chief Zhong, this method is also a wall-type caving method in the final analysis!" ”

"In the big picture, yes." Zhong Bai nodded, and praised the director of the equipment department who was biased without a few new terms, and explained: "But this method is the powerful version of the wall caving method, and its core lies in the fact that the material of the load-bearing roof has changed from pit wood to hydraulic pillar, which is the core, so I named it - 'single hydraulic support roof method'!" ”