"Old Song, let's go, you don't have much time for me, time is pressing. ”

Seeing Song Tianyu nodding, Fang Yi was also very satisfied in his heart, judging from the few spirit stones that Ito and the others got, there must be a spirit stone vein under his feet, and five or six days was enough for Fang Yi to get enough spirit stones.

"Okay, let's go to the mine first. ”

Song Tianyu knew what Fang Yi meant, and immediately took the lead and walked out, in fact, Song Tianyu also had some thoughts in his heart about this spirit stone vein, before the people of the sect came, he could still get some of Fang Yi's light, no matter how bad it was, he could always get three or five spirit stones.

"Where is the mine, shall I go down first?"

Coming to the back of the row house more than 100 meters, Song Tianyu stopped, in order to survey the underground diamond reserves, the staff dug out more than ten mines of different sizes within the scope of the mine, and the mine that Song Tianyu came to at this time was the deepest one.

"Okay, stay safe. Fang Yi nodded, and said to Song Tianyu with a smile: "Old Song, don't say that I don't care about you, the spirit stones you found before you leave are all owned by you, as for how to hide those spirit stones, it's your business." ”

"Hehe, thank you, brother!"

Song Tianyu couldn't help laughing when he heard this, he was going to stay here for three days before leaving, these three days were naturally used for mining, the reward of the sect Song Tianyu certainly wanted, but with this opportunity, the spirit stone that was equivalent to currency in the cultivator world, Song Tianyu didn't want to miss it.

There are usually two types of diamond mining, the first is open-pit mining.

Open-pit driving is to first cover the soil and rock on the ore body, directly in the open-pit mining method, because the mining work is carried out in the open-pit operation, this method is much faster than underground mining, usually using stepped mining, after mining, often leave a deep pit up to hundreds of meters deep on the ground.

The largest and deepest open-pit diamond mine in the world is in Siberia, where Fang Yi and Song Tianyu are located, and is known as the Peace Diamond Mine by the world.

This is a diamond mine that was discovered and mined in 1955, and was not closed until these two years, after half a century of mining, this diamond mine is more than 500 meters deep, and the entrance diameter is 1,200 meters, which is equivalent to 161 stories high, and is the second largest man-made excavation in the world, second only to the Bingham Canyon copper mine in the United States.

The second method is underground mining, with the expansion of the open-pit mine, the waste rock that needs to be transported out increases, and the cost of transporting the waste rock also increases, which ultimately makes underground mining more efficient than open-pit mining.

The second method is usually used to survey diamond mines, that is, to drill a hole, and then drill the depth of kimberlite deep into the stratum to determine the reserves of diamond mines, and the mine selected by Fang Yi and Song Tianyu is a mine hole with a depth of more than 50 meters.

"Fang Yi, be careful, there are piles of stones underneath. ”

Song Tianyu was the first to jump into the mine, because he wanted to survey the direction of the diamond mine, this mine was not straight down, but meandered down for more than fifty meters, and the depth at the entrance was only three or four meters.

"It's okay, Old Song, you pay attention to your own safety. ”

Fang Yi agreed, and jumped down lightly, although there was darkness in the mine, but this had little impact on Fang Yi and Song Tianyu, with their cultivation, they were able to see in the dark, but unlike Song Tianyu, who stared around with round eyes, Fang Yi was observing the situation in the mine with his divine sense.

"This should be it. Fang Yi nodded lightly in the darkness, he could sense the trace of aura remaining in the mine.

"Fang Yi, here, why is the temperature here so low?"

Song Tianyu took a few steps inside, couldn't help but shudder, and said, "According to common sense, the temperature underground should not be higher than the ground, but it's too cold inside." ”

At this time, Siberia is the coldest season of the year, and the ground temperature is usually minus fifty or sixty degrees, but Song Tianyu found that the temperature in this cave seems to be even lower, so cold that his blood seems to be unable to flow.

"Take a look inside. ”

Although the temperature was extremely low, Fang Yi had no effect, and this low temperature also made Fang Yi secretly happy in his heart, because the Arctic Ice Cave he encountered last time was so cold, and Fang Yi found a total of more than ten spirit stones in it that time.

"Okay. Song Tianyu ran the exercises, and his body was a little stiff and walked inside, but the more he went inside, the lower the temperature became, if he hadn't advanced to the congenital, Song Tianyu was afraid that he would have been frozen a long time ago.

"It's no wonder that the pre-exploration progress of this diamond mine is so slow. ”

Song Tianyu said while moving his body: "Don't talk about winter, it's summer, even if the temperature is not much higher underground, we are all frozen like this, let alone those ordinary people." ”

"There should be equipment on the outside that can bring electricity to the inside, right?"

Fang Yi observed the situation in the mine and found that the mine had been equipped with a conveyor belt on the ground, and there was a light on the wall every few meters, although Fang Yi could see in the dark, but if there was a light, it would be much more convenient.

"I'll go out and have a look. Song Tianyu's cultivation was far inferior to Fang Yi, and his eyes were not really looking around, so he greeted Fang Yi at the moment and returned to the ground.

After about seven or eight minutes, Fang Yi suddenly heard a roar from the ground, and then the lights in the mine turned on, and then Song Tianyu jumped down and said, "There is a diesel generator, but there is not much diesel, it can only be used for five or six hours at most." ”

"If you really dig out the spirit stone, you don't need lights, you know. ”

Fang Yi smiled and shook his head, in the eyes of ordinary people, the spirit stone may be a crystal clear jade, but the cultivator can sense the aura diffused by the spirit stone, Song Tianyu is now an innate cultivator, although he can't use the spirit stone to cultivate, but there should be no problem in sensing the aura.

"W, how do you dig this?"

Song Tianyu scratched his head, the mine cave also came down, and the lights were turned on, but how to mine spirit stones, he had no experience at all, and when he looked at it, the entire mine was full of dirt and stones, and Song Tianyu didn't know where to start at all.

"I don't know about that. ”

The spirit stones that Fang Yi encountered in the Arctic Ice Cave back then were all on the surface of the ice cave, and he could reach out to get them, and it was the first time Fang Yi had seen a spirit stone vein like this in front of him, and he didn't know where to start.

"There's a tool over there, so I think let's dig in in a random direction. ”

Fang Yi didn't want to waste time, so he pointed to the manual stone crushing hammer in the cave and said, "Old Song, we said so much before, it would be funny if this wasn't a spirit stone vein, don't talk nonsense, let's get to work." ”

"Okay, I'll dig in from here. Song Tianyu nodded, stretched out his hand and picked up a stone hammer, he was also afraid that he would make a fuss, if there were only those three spirit stones here and he reported it, then the sect's reward would immediately become a punishment.

The stone hammer is the most commonly used and common tool in the mine, it is also called the stone crusher, through the vibration to break the hard stone wall and the ground, the hand of the stone hammer started, the mine suddenly sounded a huge roar.

Using a stone crusher requires a lot of arm strength, which is not a problem for Song Tianyu and Fang Yi, the brothers each chose a direction and used a stone crusher to dig in the mine, and the pieces of gravel were sent to the conveyor belt to the surface.

The stones broken by the stone crusher are all small stones and frozen soil, if there are spirit stones in them, it is impossible to hide from Fang Yi and Song Tianyu's spiritual power induction, but after working for most of the day, neither of them found a single spirit stone.

In the process, Fang Yi found some small crystal clear stones mixed with the soil and ore, but Fang Yi was not interested in diamonds, and only occasionally picked up one or two of the more conspicuous ones and put them in his pocket.

Five or six hours passed, Rao is Song Tianyu was already an innate cultivator, and his tired arms were sore, and the stone crusher that was originally as light as nothing in his hand seemed to have become heavy, just when he was about to go out to rest for a while, Song Tianyu suddenly felt a faint aura.

"Hmm, I've found a spirit stone!"

Throwing away the stone crusher, Song Tianyu almost threw his entire body to the ground, carefully picked up a spirit stone that was only slightly larger than his thumb nail, and rubbed it vigorously on his clothes, Song Tianyu's face was full of excited expressions.

"Really. ”

Fang Yi walked over when he heard the sound, glanced at the spirit stone in Song Tianyu's hand, and smiled bitterly, "Old Song, I feel that I have suffered a loss, it took me half a day to dig up a spirit stone, even if I dig for five or six days, I can only dig a few?"

I don't know if it was affected by some kind of substance in the mine, Fang Yi's divine sense couldn't penetrate those dirt and kimberlite rocks to find spirit stones, so he could only use this stupid method like Song Tianyu, but the efficiency of this method was too low, and Fang Yi hadn't been able to mine a spirit stone so far.

"Fang Yi, you can be content. ”

Hearing Fang Yi's words, Song Tianyu couldn't help but purse his lips and said, "The spirit stone vein is not so easy to mine, you know that in the spirit stone vein of the cultivator realm, thousands of mortals can only mine so many spirit stones every day, and we can dig one in half a day, which shows that there are definitely a lot of spirit stone reserves in this vein." ”

"The problem is that I'm at a loss. ”

Fang Yi glared at Song Tianyu angrily, turned around with the gravel hammer and started to work again, but Fang Yi knew in his heart that Song Tianyu was here at the moment that he had some tricks that were not easy to use, and after Song Tianyu left, Fang Yi would be able to speed up his efficiency in mining spirit stones.

"You've got three more pieces before. ”

Song Tianyu sneered, and also picked up the gravel hammer and continued to mine, after getting a spirit stone, Song Tianyu's body seemed to be full of strength again, and his originally sore arm seemed to be no longer in trouble.

I don't know if it's really bad luck as Song Tianyu, in the whole three days of sleepless excavation, Fang Yi actually only dug up one spirit stone, and Song Tianyu actually mined seven, he relied on his own strength, and dug out a passage more than forty meters long.

"Fang Yi, I'm going back. ”

After getting the seventh spirit stone, Song Tianyu shouted Fang Yi up, and said with a reluctant face: "I have to go back, otherwise I can't explain to the sect, I have to hand over two of these seven spirit stones, and then you can take two too, plus the one you mined yourself, it is equal to three for each of our brothers." ”

To be honest, Song Tianyu was really embarrassed at the moment, there was indeed a spirit stone vein underground, but Fang Yi's luck was really bad, it took three whole days to dig one, if it was like this in the next few days, then Fang Yi's harvest was probably not as many spirit stones as he had grabbed from Ito and the others.

However, not all of these seven spirit stones are Song Tianyu's own, he needs to take out two of them and hand them over to the sect, otherwise there is no evidence, Song Tianyu can't make the sect believe that there is a spirit stone vein here, as for the two spirit stones handed over, whether the sect can return them to himself, Song Tianyu doesn't know.

"Old Song, what's yours is yours, you don't need to give it to me. Fang Yi shook his head, pushed the two spirit stones back, and said, "I still have three days to do, maybe I dig more than you, you can keep these spirit stones for yourself." ”

Fang Yi knew very well in his heart that he only dug a spirit stone, not that he was unlucky, but the direction that Song Tianyu dug should be the direction of the spirit stone vein, and after Song Tianyu left, Fang Yi continued to dig, and the harvest was definitely much more than Song Tianyu.

(End of chapter)