Durham county record office hold the compensation records. This is an example of what’s in one volume. Unfortunately I think they have to be accessed in the office itself and the search room is now closed as they are moving premises. They are still answering email enquiries, but for some things they charge. You could always email them to ask and see how much they’d charge to look up what you need. Eg
“ Ref: D/DMA 4/5/5
Compensation Department, Reports of meetings of the Arbitration Committee (labelled 'Minutes of Arbitration Committee'), vol.5, 14 January - 21 December 1925 Reports of regular meetings (1) for fatal cases gives case numbers, lodges, names, ages, occupations, details of accidents, details of dependents (family relationships, ages, occupations and earnings), and settlement claims, offers and awards; (2) for requests [i.e. variations to awards] gives case numbers, lodges, names, details of awards, details of dependents (family relationships, ages, occupations and earnings), and details of award variations; (3) for cases dealt with outside the Arbitration Committee [i.e. collieries not in the Durham Colliery Owners' Mutual Protection Association] gives case numbers, lodges, names, ages, occupations, details of accidents, details of dependents (family relationships and ages), and settlements; (4) for non-fatal cases gives case numbers, lodges, names, ages, occupations, details of accident, and medical opinions; (5) for official medical referee cases gives case numbers, lodges, names, ages, occupations and opinions of medical referee; (6) for County Court cases gives case numbers, lodges, names, ages, occupations, details of accidents and judgements; with indexes to fatal, non-fatal and official medical referee cases, in lodge and alphabetical order Also review of the work of the Compensation Department in 1925 With indexes (in lodge order and in name order) to fatal cases, non-fatal cases and official medical referee cases Formerly numbered as D/DMA (Sam Watson) Vol 170 Indexed in 'Mining Durham's Hidden Depths'
http://www.durhamrecordoffice.org.uk/article/10562/Mining-Durhams-Hidden-Depths