I'm reasonably certain - maybe someone with better knowledge can back me up on this - that Silkstone is generally the name of the coal (seam) that was mined and less a reference to a particular location.
BTW: the most common mine names in Yorkshire seem to be Lane End and Victoria.
As I mentioned, the map is by no means complete.
My aim is to get as many mines (and named mines) on one map along with railways, ironworks and tramways - the basic background map may vary in vintage, but is generally early to mid 20th century with older or newer mines copied and pasted in in Photoshop. This period seems to be a good "mean" for getting working railways and many smaller mines on the map.
It may confuse some people that mines are shown that are either before or after the map period, but it is not intended to be one particular "slice" of history.
Main reference sources are freely available Coal Authority maps, BGS data, "Old Maps", the Leeds Tithemap Resource, online local/regional/parish magazines, railway walks, local history and industrial archaeology groups, recorded BGS mineral sites from local government surveys (planning permission) and genealogy groups - and of course, AN members and sources.
Glad to have helped
Cheers
D.