Quote Originally Posted by Zummat View Post
Yes it closes up after the 20th expansion. Do not expand the 20th time. I did before I knew that would happen and I cannot expand anymore and cannot mine with dynamite. I hope they give us more expansions by mining but until then DO NOT expand more than 19 times.
Thank you sharing your experience with the 20th expansion - sorry you had to experience it firsthand. Hopefully they'll add more expansions