What does the phrase "Mined to the ground" mean?

[askingquestion]

“Every meter, every kilometer costs lives. You can do something really fast, but the field is mined to the ground,” he said.
From the link: https://edition.cnn.com/2023/07/01/...kraine-zelensky-prigozhin-intl-hnk/index.html
What is the meaning of being mined to the ground?
I try to google it and I don't understand the results. I am also not native English.

 

[kuruman]

I don' think it's a colloquialism. I think it means that there the Russians have placed mines in the ground all over the place.

 

[Hornbein]

I doesn't make sense, but I'm pretty sure he means there are a great many mines in the ground.