No it means
fixed
secure
stable
rooted
riveted
moored
anchored
What is it anchored to?
What is it rooted in?
What is it riveted to, and who found bolts strong enough to rivet it?
What is it moored to?
How did the writers know it was anchored?
Were they writing a scientific statement about the earth? Because if you think they were, you surely have to acknowledge that their statements would change as people discovered more.
People learn; all the time. I doubt that anyone in Paul's day would have thought that people would one day sit in a long, heavy metal tube and fly off to another country to preach the Gospel. I imagine that if anyone had told them that, one day, people would sit in front of a machine, type words onto a screen, press a button and share the Gospel with folk on the other side of the world, they would have declared it to be a miracle. The Bible doesn't say that these things will happen one day. Jesus said, "go into the world ..." not "sit in front of a computer". Does that mean it's wrong? Of course not. We have learned and developed technology to make sharing the Gospel easier, so we use it.
IF the earth was fixed in the sky - suspended by something; anchored to something else, then scientists today would agree and post pictures etc.
But they don't and it's not.
There is no enormously long chain which anchors the earth to something.
It is well known that the earth revolves around the sun - and takes a year to do so.
It is well known that the earth rotates on its own axis - and takes a day to do so.
That Genesis doesn't say, "then God created the sun around which all planets revolve", does not mean it doesn't happen.
The purpose of Genesis 1 is to say that GOD created - not to give minute scientific details about how he did it.
I hope that you never find yourself talking to non-Christian scientists. They'd destroy your arguments in minutes - and then leave with the impression that Christians are ignorant and don't know what they are talking about.