Yep went a few months back myself with a friend .we had been in a good number of times and had a good idea of our way around .went in on push bikes to cover ground quicker once we had a few major points marked out .on our last visit though we found trip lines in the woods leading to the air ventilation shaft and the hole in was welded with motion sensors all around it !
There was also lots of fresh tyre tracks and dog prints around the whole area .
Although there is other ways in they would need ropes and would still be a tad sketchy but still possible and worth it if you've never been down. Its an amazing place .but there's quite a few mines in the area that you can explore if youblook around
Good luck bud