"Hey, Feng, you get it here first, I'll go over there and use an electric drill to get a few samples out." Despite his exhaustion, Tim's good work ethic kept him going. The sample in this cross-section was not very complete, so Tim had to go to another cross-section more than twenty meters away to continue collecting samples, and the electric drill he said was battery-powered.

Tang Feng looked at Tim and waved his hand: "Tim, you go over there, and I'll solve it here." ”

Tim smiled, unscrewed the miner's lamp overhead, and turned to walk off into the distance. Tang Feng waved the claw hammer in his hand and smashed it at a piece of pyrite about the size of a fist, and there was a loud "boom", which startled Tang Feng. It turned out that with Tang Feng's fierce hammer, the huge rock inlaid with pyrite rolled out at once, and a swarthy hole was suddenly exposed.

"What's wrong?" Tim's voice sounded in the distance, as if the loud noise had startled him as well.

Tang Feng, who was scared and sweating, looked at the claw hammer in his hand that was less than thirty centimeters long, and he couldn't imagine that the little guy in his hand would have such a great power, you must know that the size of the rock just now was the size of two Tang Feng's bodies, and it was definitely not something that this small hammer could smash.

Hearing Tim's question, Tang Feng eased up, swallowed a mouthful of saliva and was about to answer, but found that the wrist-type dangerous gas tester on his wrist was beeping wildly, Tang Feng looked down and found that the red warning light representing gas was flashing wildly.

Tang Feng's face suddenly changed greatly, and then he thought that Tim was using an electric drill to drill holes in the rock wall, and when the electric drill was working, the sparks generated between the brushes and the rotor

Thinking of this, Tang Feng immediately shouted loudly: "Tim, quickly stop the electric drill in your hand, gas has been found here."

But before Tang Feng could finish speaking, in the darkness more than twenty meters away, in addition to the light emitted by Tim's miner's lamp, an orange-red fireball suddenly lit up

Gas is a colorless and odorless gas, the main component is alkanes, of which flammable and explosive methane accounts for the vast majority. Methane is the main component of natural gas, biogas and a variety of liquid fuels, and is an important industrial raw material and gas for daily life, with a lower limit of 5.3% and an upper limit of 15% in the atmosphere. Therefore, once gas gas appears in the mine, as long as the explosion zone of this gas is reached, and then it encounters an open flame, a catastrophic gas explosion will occur!

Among the many types of mining disasters that have occurred in history, gas explosions have always been at the top and are the most terrible type of mining disasters

Gas gas is generally found in coal mines, and it can also be encountered in iron mines, but it is rare, and the first two times when I went down the mine did not encounter gas gas, but who knows, with the huge rock being smashed open by Tang Feng's hammer, a large amount of gas gas gushed out here, and it is so good that Tim is working with an electric drill not far away! When the electric drill is working, it will produce electric sparks

Although Tang Feng had never encountered a mining disaster before, Tang Feng also read a lot of information about various mining disasters when he was usually fine, after all, his job is to deal with mineral resources, so he pays special attention to the protection of his own safety. So when Tang Feng saw a fireball erupt from Tim's position not far away, he almost subconsciously pressed the oxygen mask hanging from his waist on his face, and then without even thinking about it, a fish leap into the hole that had just been exposed, ignoring what danger would be in the hole.

At this juncture, there is no danger more dangerous than the upcoming gas explosion, you must know that once the gas explosion, the power is quite terrifying, even compared to the giant bomb with a charge of hundreds of kilograms, it is almost impossible for people to survive within the scope of this explosion!

So even if it's dangerous in that hole, it's just a death, what if there's no danger in that hole? Maybe you can escape this fate!

Tang Feng, whose body was still in mid-air, suddenly felt that his eardrums were swollen violently, and then accompanied by an extremely strange whistling sound, Tang Feng felt as if his body had been smashed by a sledgehammer, and then, in the originally dim alleyway, it was instantly filled with bright flames.

And Tang Feng, whose body was pushed hard by the shock wave of the explosion, rolled into the hole in embarrassment, and fell heavily to the ground! Almost instantly, a thick flame came in from the outside along the hole, and with the help of the bright flame, Tang Feng saw a situation that he could hardly believe.

Behind the entrance of the cave was a space about three meters high but the area was the size of a football field, and less than a meter in front of Tang Feng was a huge crack, and the flame that came in along the hole retracted in less than a second, and then formed a huge torch in the form of a jet outside the hole!

There is no doubt that this originally isolated underground space should store extremely rich gas gas, and too strong gas gas will not explode after exceeding the explosion limit of 15%, and it will only deflagrate after it is fully combined with sufficient oxygen.

Obviously, the concentration of gas in this space is obviously large enough to exceed the explosion limit of gas, and because the concentration of gas gas is too high, all oxygen is expelled, and there is enough oxygen in the tunnel outside the cave entrance, so this outward injection is formed.

This situation is like a liquefied gas tank, which contains a very high concentration of methane gas, so the methane does not burn in the liquefied gas tank, and only when it is ignited externally, the liquefied gas tank will shoot flames outward!

In the same way, once the gas in this space is sprayed outward too much, and the concentration of gas in the space drops to the explosion limit, the space will immediately explode like a bomb!

Therefore, if Tang Feng wants to survive, he must find an escape path within the explosion limit where the gas concentration in this space drops!

Tang Feng knows very well that the relative density of gas to air is 0.554, and the density of gas in the standard state is 0.716kg, so it often accumulates in the upper part of the coal mine roadway and the high roof. And if there is a gap at the top of this space leading to the outside, there will definitely be no gas gas with such a high concentration, so there will definitely be no road to other places in the parts above the ground in this space, except for the hole at the top of the space that Tang Feng fell down just now, otherwise, there will definitely not be such a strong gas gas in this space!

And the only place where you can escape for your life is probably the huge crack in front of you, which is more than three meters wide!