In the early morning of the next day, Jiang Feng drove a pickup truck carrying Wei Da and Wei Er to the direction of Neijiang, followed by Luo Honda and led the truck to transport building materials and steel pipes.

Jiang Feng/Wei Da/Wei Er/Gong Da/Gong Er, first went to the coal mine to clean up the site and install the engineering circuit, and then entrusted the logistics company to help transport the equipment and materials.

Improved formula cement, sand and gravel, steel pipes and bolts, all kinds of engineering equipment, all transported to the construction site, almost 15 trucks are needed, and the freight is more than 10,000!

It's a little expensive, but it's convenient, isn't it?

Jiang Feng, Luo Honda, engineering troops, and maintenance troops all participated in the risk removal business, and mechanical experts and logistics soldiers stayed behind to renovate the configuration of the maintenance plant and complete the remaining renovations.

At 8 o'clock in the morning, Jiang Feng went to the coal mine, arranged for Wei Dawei 2 to start work, cleaned up the construction area, and sent Gong Dagong 2 to prepare to go down the mine and test the safety data.

According to the safety guidelines, during operation, the blower must be kept running, the gas must not exceed the standard, and the mine work clothes/safety helmet/safety shoes must be worn before going down...

Of course, the mercenaries' helmets and protective suits fully meet the relevant standards, and they go directly into the mine! They are not afraid of excessive gas concentrations, and they have their own detection systems.

"Wei Da Wei Er, pull up the cordon, first take over the safety supervision equipment of the coal mine; Qin Da Qin Er, you go down the mine to check the hidden danger of collapse and determine the construction plan. ”

Jiang Feng instructed: "Pay attention to safety!"

The mercenaries agreed: "Yes, boss!" and then went to their respective jobs to deal with the preliminary work, while Jiang Feng went to the coal mine office and asked the person in charge to sign the contract.

The deputy general manager of the coal mine/the chief of the financial section/the chief of the logistics section and other major leaders have been waiting for a long time, and they are looking forward to Lingfeng Technology coming to eliminate the risk, and the loss of shutdown is too great!

The direct economic loss is 20-300,000 yuan/day, and they can save more than 100,000 yuan if they can start work half a day in advance, so they are willing to pay a high price to save time.

"Welcome Mr. Jiang! I look forward to you coming~"

"If you miss the distance, Mr. Jiang doesn't mind..."

"Mr. Jiang, please! The contract has already been drawn up. ”

The leaders of the first vote of the mine were enthusiastic, and signed the project risk removal contract, paying 1 million again, plus the 500,000 yuan in advance, and paying a total of 1.5 million yuan in the early stage.

Jiang Feng was very satisfied with the remaining two million, which was paid off after completion and did not need to be pressed on the quality deposit; after discussing with the relevant departments of the coal mine, the project officially began!

Small concrete mixers, small cement pumps, cement sand and gravel steel pipes, drilling rigs, cutting machines, steel plates and other raw materials and equipment have been delivered one after another, and they can be used for jacking operations.

Qin Daqin Er went down to the mine to inspect and finished the final construction plan: "Boss, according to speculation, the cracks inside the mine are caused by gunshot/drilling vibration!"

"Six 50-500m fissures, 300 meters above the roadway dome, crack width 0.2--4cm, some have a greater risk of collapse, the total weight of more than 42,500 tons. ”

"First of all, it is necessary to use steel pipes and steel plates to support it. ”

"Secondly, the grout is pumped into the gap. ”

"Finally, cover with concrete filling. ”

"In addition, in order to reduce the impact of vibration, we have added flexible materials to the concrete, which can greatly reduce the transmission ......of vibrations!"

Concise and to the point, the requirements are clear: Luo Honda is responsible for coordinating transportation/logistics/safety supervision this time, and the engineering corps is responsible for installing the jacking steel pipe and pumping cement slurry into the mine.

The maintenance soldiers are responsible for mixing concrete, transporting and passing steel pipe building materials into the mine, and helping to assist in welding, while Jiang Feng is responsible for overall management and drinking tea with the mine leaders.

Mercenaries are as fast as ever!

At nine o'clock in the morning, the first batch of concrete had been mixed out by Wei Da and sent to the mine, and the main roadway had a small rail coal car, which was very convenient for transportation.

In the mine, a two-meter-tall engineer cuts and welds steel pipes and steel plates, and props up the dome of the roadway.

1. Height measurement/cutting steel pipe/welded steel plate

2. Brace the dome / bolt / pour cement

3. Pump cement slurry into the crack at high pressure

Under normal circumstances, the dome is relatively flat, and the four steel pipes support the whole steel plate, and the load bearing is more than 800 tons! The steel pipes are located on both sides against the wall, and the expansion bolts are lengthened, and the cement base is poured to be fixed, which does not affect the main roadway.

For the [engineers], there is no difficulty in these tasks, the speed is fast, and there will be absolutely no problems with the quality, and the mine leaders are very satisfied.

Jiang Feng took them to inspect the site and display the engineering materials; they had to show it, otherwise how would others know that they were using good things?

"This cement, not ordinary cement, adds special materials to it, which can reduce vibration, and the bonding effect is much higher than that of ordinary commercial mixing, compression and tensile resistance!"

"These steel pipes are alloy pipes, you see that its color is very special, black with silver gray, because the composition includes copper, tungsten, aluminum, nickel and titanium, and the bearing capacity is very large!"

"We have all seen our welding machine, needless to say the welding effect, no welding slag, no air eye, comparable to the original strength of the material, the quality is absolutely guaranteed!"

Jiang Feng was full of confidence, showing off all kinds of things, using an ordinary emery wheel cutting machine to cut the reinforced steel pipe; because the hardness was too high, the cutting discs were all worn out.

"Damn, this steel pipe is awesome~~"

"You get what you pay for, 3.5 million is worth it!"

"Envy, Mr. Jiang has so many treasures. ”

The mine leaders are full of praise and are very satisfied, if it weren't for the image, they would definitely shout 666!

Luo Honda was also surprised/curious/proud, not to mention anything else with Jiang Feng, pretending to be forced was enjoyable;

The leaders of the mine were completely convinced by Jiang Feng and did not suspect the weight problem at all; seeing that the engineering team was small, Chief Engineer Wei actually stirred the concrete himself, and was almost stunned.

How's that going to work?

The deputy general manager asked the safety technology department to immediately arrange a few skilled electricians, masons, and handymen to help do those unskilled chores/manual work.

Jiang Feng didn't refuse, expressed his gratitude, and reluctantly explained that the maintenance shop only had technical elites, and did not hire workers who were responsible for chores, and this time he forgot.

Well~ This forced outfit is fresh and refined!

Give 100 points decisively, not afraid of your pride...

But the mine leaders believe, Luo Honda also believes, look at the toolbox of these technical elites--- laser rust removal machine, laser cutting machine, laser welding machine, you say 6 is not 6?

Thanks to the workers arranged by the mine leaders, the progress of the project has been accelerated quite a lot! It is estimated that within a week, it may be possible to complete the project in five or six days, depending on how long the work can take in one day.

In just one morning, the mercenaries have supported the most dangerous 30m of the roadway, using 60 steel pipes, consuming 10 cubic meters of concrete and 2 tons of cement slurry.

At noon, the coal mine treats, arranged a big meal...