That a World Might Live by Burt B. Liston appeared in the February 1951 Issue of Amazing Stories. It can be read here at Archive.org.
A mining operation to dig up super radioactives at the cost of the lives of its miners crosses tunnels with an advanced scout from the Atlantis of the Inner Earth.
You’ve got Manfred Drake, the scumbag mine owner who will throw the lives of his workers away to save pennies, Luke Hayward, who Drake roped into being the foreman of his operation before knowing he was stepping into a bloodbath, and Jim Murchison, Hayward’s chief machine operator. Together, this trio get dragged to the inner earth, which is in the midst of civil and religious war, which could spill over top-side with an atomic invasion.
They get the whole rundown from Marna, the legitimate queen of Atlantis who, along with her handmaidens, are going to be used as camp women when the topside invasion occurs, if something doesn’t happen soon.
What ensues is a pretty fun Flash Gordon-meets-Pellucidar adventure. It’s worth a read.