Option 1. dig out the rocks.
Option 2. dig somewhere else.
Option 3. use power equipment or dynamite to break up the rock.
earthquake's happens by all of us, as we create damage on earth by digging the earth for fuel for treasures etc...
a valley
by digging holes in the earth
It is impossible to dig through to the other side of the Earth. The center of the Earth is very hot and the heat will cause death before you could ever get through it.
Mining
Yes.
By digging in the earth.
the digging, mounding,moving or preparation of the earth in heavy construction.
because it efects it
I believe they were digging to see just how far they could actually dig.
the shovel makes a hole into the earth... animals are good diggers.
Digging. Get to it.