Please, provide more information. There are possible several issues:
1. Some mod deleted the default electric miner. (perhaps bob's mods change it...)
2. You didn't notice that there are 2 miners with the same icon (I should change it)
3. More miners should be added for mods (there are issues with licenses etc.)
4. I didn't notice some sand resources in some mods or those mods don't have it because they get it through recipes etc. (I didn't notice a mod for such integration still)
Might have forgot to install you dependents, I've been trying to clean up BioTech scene the author has left it. It's been a long day and I feel this project will take some time. OKAY, so after installing your dependents I was able to place the miners, however they didn't produce anything. I'll start removing mods to see where the problem lies and just like you said "but much later...." is my time frame as well cause I want to clean this mod up.