Chapter 226: Shu Da Explodes the River (Please vote and subscribe)
After Luo Chong's simple popular science to the two, Shu Da and Da Shu also knew the existence of explosives, and Luo Chong did not ask them to keep this secret.
Since it was said out, it was natural to let all the tribesmen know. Otherwise, when Luo Chong started to blow up the river, the noise would be so loud that it would be impossible to conceal it. At that time, the tribesmen who did not know the truth would definitely doubt their lives again, so it was necessary to take precautions in advance.
In two days, due to deliberate dissemination, the tribesmen knew that the leader would make something called explosives and was going to use it to dig the river. It was said that it would be much faster than digging directly with people, but no one knew how to dig it.
On the morning of the third day after the news was made public, Luo Chong brought Da Shu and a few others to the other side of the river, preparing to experiment with the amount of blasting on the land on the other side of the river.
The specific operation steps are as follows: First, Shu Da takes the Luoyang shovel and makes a vertical downward hole at the preset blasting point. The hole is ten centimeters in diameter and four meters deep. The depth is determined by the scale on the long wooden handle of the Luoyang shovel.
After the blasthole is dug, Luo Chong puts the nitro·chemical·glycerol·oil prepared on site into a cylindrical pottery jar, which was specially made by the lame man. The outer diameter of the pottery jar is about 9 centimeters, and the mouth of the jar is slightly smaller. There is a waist-shaped closing, and a thin hemp rope can be tied to it. Then the pottery jar is slowly hung into the dug blasthole.
Then use branches to build a tripod just above the blasthole. A broken blue brick is hung on the shelf with a thin hemp rope. The brick does not need to be too large, as long as it can fall smoothly into the blasthole. This is a simple vertical impact detonation device.
After the process was arranged, Luo Chong led them to start the first blasting experiment. This time, the charge was about 300 grams, but it was just an estimate. Luo Chong specially drew several horizontal lines of different depths on the inner wall of the pottery jar as scales to observe the blasting effect of different charge amounts.
Luo Chong personally hung the pottery jar filled with charge to the bottom of the blasthole, and then hung the brick tied with a rope on the tripod above the blasthole. The brick was hung ten centimeters deep in the blasthole to prevent it from deviating when falling and not falling into the blasthole.
Then Luo Chong began to pull the rope and slowly retreat to the bunker 20 meters away. It was a trench-shaped bunker dug by Da Shu and his men. Several people were lying there waiting, with their heads exposed, watching Luo Chong coming over, and then lying with them.
"Come on, Shu Da, hold this rope, don't let go." Luo Chong handed the thin hemp rope in his hand to Shu Da.
"Ah, ah? Give it to me?" Shu Da asked in surprise.
"Yes, don't you want to try the power of the thunder? So this time you will detonate the explosives."
"But, but I, I can't do it." Shu Da stuttered.
"What's there to not know? Just hold the rope, and I'll ask you to let go in a while, just let go and lie down." Luo Chong taught Shu Da how to detonate.
"But, chief, I'm afraid."
"You're a grown man, what are you afraid of? You've been hiding so far away, are you still a man? Hurry up, hurry up, you come this time, and next time Da Shu comes, you all have to try it yourself." Luo Chong urged, cursing in his heart that he was not good enough.
"Oh."
Shu Da took the hemp rope tremblingly and held it tightly in his hand. His palms and forehead were sweating involuntarily, and his other hand kept wiping the sweat on his forehead.
"Why are you nervous? There's nothing to be afraid of. Don't worry, I installed less explosives this time, so the power won't be as strong as the last time I blew up the mountain.
Okay, everyone lie down. Shu Da, listen to my command. I'll count to one, two, three. When you hear three, let go. Got you?" Luo Chong reminded everyone.
"Yes, yes, I understand."
Shu Da nodded with a stammer. This was something like a thunderbolt, and now it was in the hands of a mortal like him. If he said he wasn't nervous, he would be lying. But now he had no chance to regret it, because Luo Chong had already shouted the order.
One, two, three
. The moment he heard Luo Chong shout three, Shu Da's nerves were tense, and he subconsciously loosened his hand. Then, in less than a second, the brick hanging on the top of the blasthole fell straight down along the vertical hole, accurately hitting the pottery jar placed at the bottom. The pottery jar shattered instantly, and the nitroglycerin inside also exploded due to the violent impact. In an instant, countless soil flew high in all directions like flowers scattered by fairies, and a crater four meters deep and more than three meters in diameter was blown out of the ground centered on the blasthole. Just as the soil was still flying in the sky, a deafening roar came from the explosion center. This is because nitroglycerin is a high explosive, and its detonation speed can reach plus or minus 7,000 meters per second, while the propagation speed of sound in the air is only 340 meters per minute, so the explosion is seen first and the sound is heard later. After the violent explosion, nearly thirty cubic meters of soil fell from the sky, covering the surrounding area of 30 meters. Because this is an underground explosion, the affected area is not large, which is still very different from the direct explosion on the surface. After a burst of heavy rain of soil, the blasting team lying 20 meters away was covered with a layer. Luo Chong was the first to raise his head, shook his head, shook off the soil on his head, and reached out to pat the people next to him. "Everyone is up. The explosion is over. It's okay. Let's go and see what's going on." "Is this dynamite? It's so powerful. I just felt the ground shaking. I can use dynamite, too. Haha." Rat Da felt Luo Chong's slap and raised his head and shook it. He couldn't help but sigh at the experience of detonating dynamite with his own hands. "Puff, cough, cough, there's a lot of soil. The sound just now was really loud." Da Shu also climbed out of the bunker. Several people walked to the blasting point together and looked at the big hole on the ground. They couldn't help but be stunned. Although this was the second time they saw the power of dynamite, it was the first time they felt it so close, especially this time they participated in the entire blasting process. "Oh my god, this dynamite is really powerful. It just blew out such a big hole. If ten tribesmen were asked to dig with shovels, it would take at least a day. This is really a magical tool." Rat Da sighed as he looked at the big hole. "Yes, now I finally understand how the leader plans to use explosives to dig a river. Does the leader want to drill a row of blastholes at the river location, and then blast a row of large pits, and use these large pits to connect a river? If so, then the speed of digging a river is really fast. If there are enough materials, it will only take a few days to dig another water diversion river." Da Shu looked at the large pit in front of him and had figured out Luo Chong's plan. (End of this chapter)
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