So the rocket will be put into the ground 'cause the space port is in cold climate.But when the fire is lit under the rocket to send it into space will the explosion blow-up the surrounding earth?Would ground explode w/ rocket silo in~ground?
Yes, of course, as displayed by several dozen Atlas ICBM silos scattered across the middle of the United States from the Cold War. You can probably find video of visits to the silos showing the missiles. They have huge concrete lids which protect them from nearby nuclear air blasts for a second strike capability that are blown aside explosively to release the missiles and there are vent/exhaust pipes for the tailpipe gases. There were other missiles launched from underground including several of the tested anti-ICBM missiles. When missiles are launched from under water, they are blown with air pressure like a torpedo from a tube but straight up and the motor ignites just above the water. The nuclear ICBM submarines do it this way as do the shorter range cruise missiles carried on submarines. If search you can find videos of these.
of course. haven't you ever seen a picture of an ICBM silo? it's just a bulge in the ground; the blast door.
The silos in the ground are sort of like a pipe inside a pipe with a space between the two pipes. When the rocket ignites the rocket gases bounce off a curved deflector at the bottom of the silo and the gases are directed up the hollow space between the two cylinders. This protects the rocket from the hot gases and yet keeps it all underground until the concrete lid is taken off
Underground launches are actually quite common. Many test firings of ballistic missiles such as Titan II (same launcher as used in the Gemini program of the 1960s), Minuteman and Peacekeepers are launched form underground silos. Most launches today are above ground, but nothing is to sat they could not be deployed or launched from underground. Being underground, the launch stack would be protected from foul weather or other possible hazards. The rocket exhaust would be directed away so as not to do damage to the launch vehicle. Underground launches would be no problem. The biggest problem is being far enough away from a populated area in case of launch vehicle failure.
