He picked up a piece of core, looked at it carefully, turned his head and asked, "What's going on with these cores?" ”

"How do we know, maybe the drilling technology played more than ten years ago is not up to standard, and the waste hole treatment is done." A technician replied in a stiff tone.

"That makes sense."

Xu Xin nodded, dropped the core, followed the exploration line, and continued to move forward in a straight line.

If you want to find the direction of the exploration line, you must always keep an eye on the instructions of the compass, and often you can't pay attention to your feet at all, and you fall into the ditch twice in a row, making the three people who follow behind you laugh so happily.

When he fell into the ditch for the third time, Xu Xin's arm almost broke because it hit the hard stone.

When I turned over and got up, I saw that the pile of stones under me was not ordinary stones at all, but a pile of cores that had been discarded at will!

The way this pile of cores was discarded was even more casual than the cores encountered before, and they didn't bother to bury it.

"What's going on with these cores?" Xu Xin looked up and asked the laughing technician standing on the top of the small earthen ditch.

"This ...... Maybe it's also a waste hole. ”

"Alright, let's move on."

Xu Xin climbed out of the ditch, climbed over the mountains, and continued to walk forward.

Later, a core discard point was found.

Combined with the system's automatically generated profile, he figured it out.

The strata beneath the core of these abandoned drill holes are all unkept.

When I arrived at the place where the mine was seen, the borehole location was made of cement to build a large and beautiful sealing mark.

Moreover, the drilling spacing between these ore holes is not large.

There is also a reason for the arrangement of the boreholes, sometimes at a distance of five or six hundred meters, sometimes at a distance of two hundred meters.

Is it so freewheeling?

In the report, the reason why the spacing of the boreholes is so different is that an explanation is given in a grand manner -

In some places, the elevation changes greatly, and the slope is steep, which is not suitable for arranging drilling, so the hole removal treatment is carried out.

No wonder the expert group did not pass the acceptance.

There's too many boreholes to handle, right?

In fact, it is not a hole move at all, but a histogram of the hole that is not seen directly without being drilled, which is presented in the data results.

This is simply to cover up and darken!

Naked prospecting fraud!

Xu Xin walked down, and he could be regarded as seeing the appalling methods of these survey work.

Because the horizon depth of the stratigraphic analysis is set at 400 meters, the energy point consumption is doubled compared to the depth of 200 meters.

He only has a 60-point energy balance and travels through the entire mine for about four kilometers in length.

A profile is automatically drawn inside the horizon.

In the profile, the ore layers are not continuous, but irregular circles, large or small, deep or shallow, scattered everywhere.

This is a typical lenticular ore body.

The energy has been completely depleted.

They were at the other end of the mine, far from Command.

Xu Xin called Qian Pangqing to send a car over, and he had to wait for a while.

He sat on the side of the road, his bare skin was scratched by the spikes, and his clothes and hair were also covered with dense Xanthus fruits.

Judging from the current situation, they can completely overturn all their knowledge of this mine.

Based on the data from 12 years ago, they designed a mining plan, and it was all shit!

If the current scheme puts costs in, the mine is mined.

Hundreds of millions of cash, not to mention the bamboo basket for water, at least it is definitely impossible to recover the cost from the mine.

It was too late to wait until large-scale mining to find out that something was wrong.

Xu Xin took out his mobile phone and dialed his father's number.

"You ran back to the city by yourself, didn't say hello, and you still have the face to call me?" Xu Hengqiang's voice suppressed his anger.

Xu Xin didn't want to explain, so he said his words directly: "I found some problems in the Yantugou bauxite mine. ”

"What are you doing there, full of food?"

"Let me tell you about the two problems I found, I really don't understand, I hope you can give me some references."

"Tell me about it."

"The first point is that the rock outburst bauxite deposit is not a sedimentary deposit, but a lenticular deposit......"

"I don't need to say this, I guessed it more than ten years ago!

Our Heijin Province is rich in bauxite reserves, which are among the best in the country. Bauxite in the province is mainly distributed in the central region, especially in our happy city, there are many medium-sized bauxite deposits, small deposits, all of which are lenticular deposits.

It can be arbitrarily said that it is almost impossible for a large sedimentary bauxite deposit to exist in this part of the city.

It is mainly determined by the metallogenic conditions, and it is not clear for a while, so I will have a good chat with you when I have time. ”

Xu Xin listened to this and was taught.

This is a law summed up by decades of experience.

Xu continued: "I walked along an exploration line and found at least three borehole cores that had been abandoned, and in these abandoned cores, no ore layers were found. There is a rule, see the ore hole core is well preserved, and do not see that the ore hole core is all abandoned. ”

"I haven't seen it in the Yantugou bauxite mine, so I don't know the details.

Only the data of the ore holes are retained, and all the ore holes are not destroyed, which creates the illusion of continuous ore seams, and thus leads to the conclusion of sedimentary deposits, which sounds like this. ”

"Yes, I don't understand, how did the project pass the acceptance later?"

"The people of the acceptance expert group were all changed, and the acceptance was passed. No one knows what happened in the first place, and we can't care about those problems. ”

"The mines here have already entered the stage of mining operations, and they are mined according to the scale of large-scale mines, and the investment is huge!"

"If you dig down and find that the deposit is not continuous, and what is dug out is not bauxite, but worthless earth and stone, you can only admit compensation, which is not uncommon in the mining industry."

"Dad, you are too ruthless when you say that, Qian Pangqing is my classmate's father after all, I want to help.

Not to mention what to do to help, it is also good to be reminded and stop losses in time.

Do you think there's a good way to do it? ”

"It's a very complicated issue. This depends on the occurrence of underground lenticular bauxite deposits, and whether the enrichment degree is suitable for industrial mining.

The mining area is relatively large, and the lenticular ore body is scattered, so it is very difficult to find out the distribution and scale of the ore body safely.

As an investor, in this case, it is not suitable to continue the investigation by directly and truthfully reporting to Party A. ”

"What if you have to verify it?" Xu Xin hurriedly asked.

"According to the geological method, the grid density is reduced, and the interval between 50 meters and 100 meters is a hole, which can definitely feel the scattered ore body clearly.

Of course, with this method, the total number of boreholes may be close to 100,000 meters, and the investment will be hundreds of millions.

After really figuring out the situation of the ore body, plus the mining cost and tax, it may not be profitable. ”

That's exactly what happened.

Xu Xin scratched his head and said with a smile: "Is there an easy way?" ”

"Physical prospecting, isn't that what you majored in college?"

"Well, yes, but I've only learned the basics. Dad, you tell me directly, if it were you who made the decision, which method would you use? ”

"Conventional geophysical surveys, nothing more than gravity magnetic shock, seismic prospecting has developed rapidly in recent years, and has made great progress in deep prospecting, but in terms of finding solid ore, seismic methods do not seem to be suitable.

Magnetic prospecting should not be suitable over there, and there should be a layer of iron ore on the bottom plate of the bauxite layer, which has a great impact on the determination of the bauxite body.

Electrical measurement is very suitable, measuring the resistivity difference between lithologies, and can roughly circle the size and location of the ore body. However, this method is costly and time-consuming. This method is the most mature in terms of technology,

If you want to save money and time, use relative gravity measurement, which only takes a few minutes. However, this method is very inaccurate.

In general, except for seismic measurements, the other three measurements are greatly affected by various factors, and the measurement errors are also very large, and there are many interpretations, which can only be used as a reference. ”

"Okay, I see."

"Learn more and watch more, think about everything in your head, how to improve?" Xu Hengqiang did not forget to teach a lesson.