There is always a risk of collapse, especially if you have anything moving on that floor near the cellar.
How much shoring is the question, and I have seen some that have very little. It is your place and your responsibility to fix any issues that arise. Oehler's PSP method can work with very little materials.
"You must be the change you want to see in the world." "First they ignore you, then they laugh at you, then they fight you, then you win." --Mahatma Gandhi
"Preach the Gospel always, and if necessary, use words." --Francis of Assisi.
"Family farms work when the whole family works the farm." -- Adam Klaus
Destroy anything that stands in your way. Except this tiny ad:
2020 Permaculture Design Course for Scientists and Engineers, June 14-27