phyllostachys Aurea bamboo in raised beds concern

Hi, I am hoping someone can offer me some advice and hopefully reassurance on this type of bamboo that I have planted into two concrete block raised beds. I have seen some comments on bamboo and just hoping that the bamboo roots are not going to go so deep that it comes up anywhere else especially neighbours gardens and my own.The raised beds are just over 2 feet high including the foundations.I also include a picture to hopefully help answer any other questions you may have.