6 months ago
Last edited at 5:14AM on 9/25/2013
You'll die way before you can reach the liquid magma layer, you'll die inside the soil because of the temperature. For instance the deepest mine in the world is 2.4 miles deep and it is 131 F inside. And you would have about 20 miles more soil. Then, even if you find a way not to get hot you'll have to deal with the half liquid mantle and the liquid outer core in which you would have to deal with the immense pressure too. And that is a lot of pressure. Then the inner core at the very center of the Earth is a solid metal(mostly iron) ball which you can't go through and it is not that smaller than the moon and not that cooler then the sun.
Assuming you are in a vessel that withstand the immense pressure and heat in the earth and there is an empty tunnel leading to the center of the earth and beyond, you would fall to the center and stay there or shoot passed it, depending on your momentum