Geometry CT-image

Hi,
I have a CT-image for sandstone. I need to mesh the porespace (black area in the attached image) to be able to simulate some geomechanics process using a third-party software.
any help/hints will be much appreciated.
Thanks you all,
Hefny
https://imageshack.com/a/img922/2237/RPg2HD.png

Any chance you can share a small sample model? This might be better meshed in Bolt than Trelis.

Hi,
a CT-image (binary image) like this one
RPg2HD.png

this is just an example model for a mesh slice, which i would like to do similar meshing for my CT image
working simulation.png