Digging is certainly normal for this type of tortoise, or so I understand.I have a horsefield tortoise and he has hide holes but at night he burrows in the corner of his bed area is this normal? I've heard they dig to regulate their temp. I've had him for around 2 months now.
Perhaps you'd like to post in the Russian tortoise section, where people know more about your type of tortoise, or introduce yourself in the Introductions section?
And a warm welcome to tortoise forum
Glad you are here.