Got sources and examples for this claim? I admit I do not know.
I don't know of a way to show it is not included. In Texas, mineral rights are a separate property, just like a neighboring acreage would be separated from land needed to build and maintain a pipeline, wall, road etc.
They can claim what is needed in court. If the land owner doesn't want to sell it as a whole, eminent domain can only be used for what is needed. You cannot claim my 1,000 acre ranch because the pipeline route goes through 20 feet on a corner.