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- W610499033 abstract "The paper first identifies the expected national tunnelling requirement for all National Coal Board mines and the chief factors influencing the choice of related techniques and equipment available to meet the needs of an individual colliery. An overview account is then given of trends in innovations in the roadheader, drill and fire and circular methods of tunnelling in the NCB. This lays emphasis on the aim to improve the scope, versatility, capacity and running time of machinery concerned by means of proved and tested refinements and new techniques and equipment, thus to raise the national rate of tunnel advance, and productivity. The significant solutions thought necessary for the required improvement of performance, efficiency and safety in NCB tunnels are outlined in the final section. (Author/TRRL)" @default.
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- W610499033 date "1985-03-01" @default.
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- W610499033 title "DEVELOPMENTS IN TUNNELLING TECHNIQUES AND EQUIPMENT IN THE NATIONAL COAL BOARD" @default.
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