After spending minutes on top of minutes running through our mine and for as complex as a mine system CAN be developed into I'm suggesting a rail system. It's very time consuming bringing bulk resources from the very depths of your mine up to the front where your main workstations are to process all your material , even using horse and wagon to do so. Why not allow us to build a rail system in-game where we can lay track and build mine cart(s) with perhaps some limitations and to keep things realistic. Mine carts can be powered by fuel(wood scraps or coal) allowing us to carry larger amounts of loads at a faster rate than by horse and wagon. Sure, if you wish to continue using a horse and wagon because it's cheaper to operate do so, but as time goes by and claims because wealthier with resources to knowledge, allow claims to take on an entire new system in our mines.
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