A £350,000 grant from the Heritage Lottery Fund will be spent by the National Coal Mining Museum partly on conserving a collection of coal-cutting machinery.
A slice of the latest money will also be used to save an unpublished collection of photographs from Jeffrey Diamond, a Wakefield-based manufacturer of mining equipment.
The windfall means the museum, at Overton, near Flockton, has now received more than £7m in lottery funds.
Mr Diamond's collection charts the development of the machinery.
Both the images and the coal-cutting equipment will be catalogued and this will be put on-line so that people can discover the history of the machines which were a force behind the mining industry.
Museum chairman Baroness Lockwood said: "We are really excited at the prospect of working with engineers and the community to bring these machines back to life."