The Large Hadron Collider is basically a particle accelerator in Switzerland made by a famous scientific organization called CERN. CERN basically uses protons, neutrons, electrons, any atom, that travel at an enormous speed in long pipes and hit another electron, proton or any atom. The impact will break the particles to pieces, allowing the CERN scientists to examine new particles made from the broken pieces. The whole purpose of LHC is to learn more about new particles that aren't available in Earth by smashing different ones together.
It has nothing to do about the Big Bang. It is about atomic structure and atoms. If you don't believe me, here is a site.
I didn't use it but it will help you know that the person above me is wrong.
http://en.wikipedia.org/wiki/LHC