Back in the day I worked (briefly) on a deep sea polymetallic nodule mining startup, and so just for fun I've been building a simulation for it. It's been done a million times before but I wanted to do it myself in project chrono using their granular terrain and old polymetallic nodule samples I have

It's in a pretty early stage of development though, I haven't added my samples yet and nothing is to scale. It does run though which is neat https://github.com/thansen0/seabed-sim-chrono