A seemingly normal but extremely frightening news, a car in western Ghana, Africa, collided with a motorcycle and exploded, killing 17 people, a large number of nearby buildings were razed to the ground, leaving a large pit tens of meters in diameter at the scene!
Ponder: The power of the explosion is so great
According to the Guardian, at noon on January 17, a moving truck and motorcycle near Apite in Bogozo, 300 kilometers west of Accra, the capital of Ghana, West Africa, were involved in a traffic accident with a motorcycle, which got stuck under the train and set off a raging fire, the Guardian reported.
The truck driver came down from the cab to check the scene and kept shouting there, making a phone call while paddling with his other hand, and the crowd of onlookers took a long time to figure it out, and the driver told them to run quickly, and the farther they ran, the better, because the truck was loaded with explosives, and a big explosion could occur at any time.
Although the people at the scene ran away, but the onlookers in the distance unknowingly surrounded them, the driver has been shouting for everyone to run quickly, the process has been repeated, the fire on the truck is getting stronger and stronger, about ten minutes after the car accident, the big explosion occurred!
The truck loaded with tons of explosives in an instant into energy spread around at a speed exceeding the sound wave, the dust was wrapped in sand and gravel, and various parts on the truck, as the air waves splashed around, where the shock wave passed, the house collapsed, destroying people, and all the houses within hundreds of meters were razed to the ground.
Trucks and motorcycles have long been unknown where to fly, and the scene has left a huge "crater", with a diameter of tens of meters and a depth estimated to be more than 5-6 meters, which is much larger than the crater of a 500-kilogram aerial bomb explosion, which seems to be the scene of a tactical nuclear weapon explosion.
The cars not far from the blast site, as well as the vendors' stalls and debris, had been swept far away by a strong air wave, as if swept by a tornado, and a house under construction not far from the scene had been preserved intact, because the house had created a frame, and the shock wave had limited damage to such buildings.
In the video released by local media, the people who did not have time to flee not far from the scene were all thrown to the ground, some were moaning, and some were motionless, and it seemed that they could not live.
According to Isaac Dsamani, head of the prestea Huni-Valley municipality, 17 bodies were cleared at the scene, another 47 people were injured, and more than 500 houses were damaged to varying degrees, some of which have completely collapsed and are still being cleaned up, and casualties are likely to continue to increase.
Ghanaian police have identified the wagon as a special transport vehicle for transport between two local gold mines, loaded with mining explosives, whether the vehicle has been transported and whether the driver is qualified to transport the special vehicle is still under investigation, but Ghana, in West Africa, has very weak control over this explosives, and the public seems to be blind to these safety hazards.
What explosives are so powerful? Will it be detonated by fire?
In everyone's impression, explosives are absolutely very dangerous, but as some friends who know it know, the earliest nitroglycerin explosives are indeed very dangerous, shaking, impact, high temperature can be detonated, so Nobel will be much safer after adsorbing it with diatomaceous earth.
After reducing the sensitivity, the explosives are much safer, and many explosives invented later, such as the well-known TNT, are very "safe", because the general fire cannot detonate it, and only when the powerful detonation energy is introduced will detonate. So why did this explosion occur, there was no explosion at the time of impact, it exploded after 10 minutes of fire, what is the reason for this, and what kind of explosives are loaded?
Will the explosives be detonated by fire?
Explosives are actually a general term for explosives, but if the scope is expanded to explosives, then there are more types, such as gunpowder, incendiary bombs and dust and even nuclear weapons are considered explosives, of course, this article only discusses this type of explosives synthesized chemically, from the beginning of gunpowder to the end of the total nitrogen anionic salt, the type is still very large, but according to the sensitivity of the distinction can generally be divided into:
Class I, CLASS II and III, only a small amount can be detonated like the general "starting explosive", such as the main component of the early detonator mercury oxylate chemical formula Hg (CNO) ₂, but this component is easy to contact with copper and other moisture after the easy to produce unstable radate and accidents, and later this detonator was replaced by lead azide, this property is stable, safer, there are also diazodyl dinitrophenol (DDNP, Diazodinitrophenol) to reduce lead pollution, There are also trace amounts of TNT and tetryl added to increase the detonation power.
You don't have to be surprised, many models of car accidents when the airbag gas generator is a lot of lead azide, after the impact of the sensor to obtain detonation information, lead azide detonation produces gas into the airbag, in the car impact after the human body leans forward to protect the human body, but the speed of the airbag pops out is extremely high, the need for seat belt restraint after the airbag is completely bounced off after the contact is safer, otherwise the airbag bounces off when the human body hits it will aggravate the injury.
Detonator detonation is explosives, energy is transmitted to the explosives will be detonated, of course, this has a certain amount of energy, such as TNT (trinitrotoluene) burst activation energy per mole 146.4KJ, and RDX (Black Sokin) burst activation energy per mole 155.54 KJ, adding wax, stearic acid and colloidal graphite and other passivators to collisions and high temperatures and so on are less sensitive, that is to say, in the transport state, this type of explosives with passivators will be safer.
In general, fire can not detonate TNT, for example, you can burn TNT with candles or lighters, but it is not necessary to burn in a fire, some can detonate and some cannot be detonated, such as RDX's slow heat burst point is about 150 ° C -170 ° C, 5 seconds of the outbreak point is 326 ° C, and TNT's 5 seconds of burst point is about 457 ° C.
The temperature resistance of the detonator is much lower than that of the explosives, most of the detonators are only about 100 ° C, the needle-shaped detonators may only be 80 ° C, and the special heat-resistant model electric detonators can reach 150 ° C, but the time will not be too long, and it will be detonated for a long time. Therefore, under the high temperature generated by the fire, the "safety explosives" may also explode, which you must understand!
In addition, explosives are not pure compounds, such as TNT mixed with RDX, and Amato explosives are mixed with TNT and ammonium nitrate, there are also aluminum powder plus RDX and then TNT mixed explosives, there are many types, detonation energy is different, the power is also very different, generally the explosion speed is the most as a power reference value.
Explosion speed below 900 meters is deflagration, and explosion speed higher than 900 meters is detonation, that is, explosion! The explosion rate of industrial explosives is mostly around 3500-5000 m/ s. TNT can reach more than 6900 m / s, while the RDX (Black Sokin) explosion speed reached 8750 m / s, and the all nitrogen anion salt is 14000 m / s, which is estimated to be the ceiling of the explosives industry.
General mine explosives can not use TNT, mine explosives are also known as industrial explosives, commonly used ammonium nitrate explosives, dainamat, ammonium oil explosives and emulsified explosives, etc., and TNT is similar, the general wood fire can not be detonated, but after the car accident fuel tank rupture of the high temperature burning, it is even possible to explode under the stimulation of the fuel tank explosion energy.
He likes that the driver can continue to discourage people from approaching at this time, because he really knows that the explosives may explode at any time but is still dissuading you from getting closer, but the Guardian report does not mention whether the driver is alive or not, hoping that he is safe.