Hi, I installed Security Craft 1.8.16 for minecraft 1.12.2 in my server and also in my client minecraft, so I was testing the mines, the mines blocks and the mine furnace and the block didn't explode when I stood over them and the furnace didn't explode when I right clicked on it, both only explode when you break it. Also if you stand on them you sink.

EDIT: I decided to download the before update and it works perfect.

Read the changelog of v1.8.16:
- Fix: Various mines do not ignore their owner
This is intended.