Zhang Tao looked at the picture of the gold mine transmitted by the drone, and there were still some lights below, I don't know if it was a night operation or a more used lighting. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 Info commanded the three drones to continue to fly forward, Zhang Tao looked at the terrain below while observing Google Maps, confirming the position of the drones.

Zhang Tao stared at the mobile phone screen while using the landline phone of the gas station to make a call to the oil company, asking the oil company to send another ton and a half of diesel tomorrow morning, Zhang Tao plans to close the business for half a day after filling up the diesel fuel for those buses tomorrow morning, and wait until the gold mined is sold for money and then buy a car to go to the forest farm to pump oil.

There is still moonlight at night, and it is hazy below, but the general terrain and mountains can still be seen clearly. After flying for a few minutes, Zhang Tao remotely controlled three drones and landed in a small forest.

Remotely control a harvester to fly into the forest to grab some long branches and leaves and spread them on the branches of a large tree, so that three drones can stop on the branch platform. Then he remotely controlled one of the harvesters, untied all the light things he was carrying, and placed them on the branch platform.

Several barrels of diesel fuel were tied to the branches of the trees with ropes, and after Zhang Tao made preparations, he flew around the grove with a remote control of a harvester to reconnoiter the situation, although there were no military patrols at night, but it was still necessary to be cautious.

After the drone flew around, it didn't notice anyone in the woods, not even an animal. He also asked the drone to tie the pangolin-type driller to the base frame with a rope and fly down from the branch platform.

Flew a few hundred meters in the woods and landed next to a ditch where the weeds grew luxuriantly and served as a natural shelter. After the drone landed on the ground, it unarmed the pangolin-type drill.

Remotely controlled the drone flew to the next moment tree with a rope, Zhang Tao switched the page of his mobile phone and tuned to the control software of the pangolin drill on the computer. Using his mobile phone to remotely control the drill, he first lowered the four track wheels of the drill, and then drove into the ditch.

There were just leaves and bugs in the ditch, and there was no water. It is estimated that the ditch was washed out by the water flow on a rainy day, so Zhang Tao put down the drill bit of the pangolin-type drill and drilled in the underground direction of the ditch.

After drilling for a few meters, it was a bit difficult to drill, and it is estimated that it encountered a stone. Zhang Tao remotely put the drill back away, and then turned on the drill on his mobile phone to increase the resonance frequency of the stone to the maximum.

After a few seconds of driving, Zhang Tao sent a command to cut off the power supply to the oscillation circuit on the drill, and stopped working. The ultrasonic waves emitted by the oscillating circuit are fan-shaped and can penetrate tens of meters of underground space.

Zhang Tao remotely controlled the drill to release the drill bit and continued to drill into the ground, this time it was very easy to drill into the ground, and it took a few seconds to drill down more than ten meters. Zhang Tao suddenly saw a signal of excessive moisture from the humidity resistance of the drill displayed on the screen of his mobile phone.

Zhang Tao immediately remotely controlled the drill to the ground, and after the drill reached the ground, he saw some soil on the shell of the driller from the picture transmitted by the drone, which should have seeped down the surface water in the process of digging.

The remote control drill pops out the coil so that it is pointed at the hole. The power control circuit that turns on the coil emits ultrasonic waves. Zhang Tao turned on the ultrasound and remotely controlled the pangolin-type drill to drill into the hole.

After reaching the bottom of the cave, Zhang Tao cut off the power switch of the spring coil, so that the soil around the hole should be dry. After the driller reached the bottom of the cave, Zhang Tao adjusted the resonance frequency of the gold, did not open the large circuit, and turned on the switch of the oscillation circuit.

Generally, there is gold in the shallow layer of the gold mine 60 meters underground, and the gold on Lao Maozi's side is not mined, so Zhang Tao first scans it with ultrasound to see if there is any gold. Since there is no open large circuit, the resonance frequency of the ultrasonic waves emitted by the oscillating circuit is small, and it can be used as a scanner.

Zhang Tao looked at the scanned image on the mobile phone screen, some gold fragments appeared on the image, the gold mines on this side of Hengshan are all placer gold, and a ton of gold ore can produce five grams to ten grams of gold when the gold mine is refined.

The ultrasonic images were tens of meters long, and Zhang Tao checked the information on the Internet that one cubic meter of soil in the gold mine weighed about three tons. Zhang Tao calculated the tonnage of gold ore on paper, according to the formula volume of the conical cube = base area multiplied by height and divided by three, the diameter of the scanned base area is 13 meters, and the height is 17 meters.

3.14 times 6.5 times 6.5 = 132.665, 132.665 times 17 divided by 3 = 751.76 cubic meters.

Multiply 751.76 cubic meters by 3 tons = 2235.305 tons.

According to the calculation of at least 5 grams of gold per ton of gold mine, 2235.3.5 times 5 = 11276.525 grams of gold, the current recovery price of 1 gram of gold is between 360 yuan and 370 yuan.

According to the minimum price of gold of 360 yuan per gram, 11276.525 grams of gold multiplied by 360 = 4059549 yuan, that is, more than 4 million yuan.

"Rich!" Zhang Tao only has this one thought in his head now.

Zhang Tao originally only brought a screen, but now so many tons of soil are obviously not enough. At this time, the humidity resistance of the pangolin drill sent a humidity increase signal, and Zhang Tao remotely controlled the driller to dig around in place to expand the space.

Then let the coil eject out, and let the drill circle around and emit ultrasonic waves to evaporate the water. Then he climbed to the ground with the remote control drill, and flew down with the oil drum with the remote control drone, filling the ground drill with diesel.

After refueling, Zhang Tao remotely controlled the drill back into the ground and continued to drill down. At the same time, a harvester was lifted into the air and flew in the direction of the gas station. Zhang Tao remotely controlled the pangolin-type drill, and drilled the ground that had just been swept with ultrasonic waves into several small cone-shaped terrains.

Zhang Tao walked home while using his mobile phone to remotely control the pangolin-type drill, and when he got home, he told his mother that he would come back to get something, and after saying hello to Zhao Yazhen, he went to the warehouse and cut off a few iron screens for sifting sand with scissors.

There are a few houses that Zhang Tao bought, and some tools were given to Zhang Tao, and there was no shortage of iron sieves to cut a few. Zhang Tao used scissors to refer to a few small square-shaped sieves, and Zhang Tao took the cut small sieves back to the gas station.

After more than 10 minutes, the harvester flew back, and by this time the pangolin drill had drilled several small cones. Zhang Tao put a dozen small iron sieves in a bag and put them aside.

After arriving at the forest farm, Zhang Tao commanded the drone to open the door door with the key, and then flew to the bedroom to the refrigerator to take out more than a dozen nitroglycerin explosives and put the explosives into the bag.

After locking the door, Zhang Tao remotely controlled the drone to take off at a constant speed, and then flew back to the gas station slowly. Half an hour later, the drone flew back to the yard of the gas station, and Zhang Tao tied the bag containing the small iron sieve to the bottom frame of the drone with a rope.

The bag containing nitroglycerin was then tied to the base frame of the harvester with a long rope so that the two bags would not touch each other. The remote control of the harvester flew into the air to pull up the altitude and fly towards the gold mine.

Zhang Tao zoomed out the images sent back by several drones, remotely controlled the pangolin driller back to the ground, asked a harvester to add diesel fuel to the drill, and then remotely controlled the pangolin driller back to the ground, and the refueling drone flew back to the tree.