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Technical paper: Colliery spoil heap material ~ time dependent changes

Roy K Taylor, PhD, Engineering Geology Laboratories, University of Durham. This paper was first published in GE’s July 1974 edition.

The 55 million tonnes of coarse discard which finds its way into colliery spoil heaps is quantitatively about five times greater than the other major industrial wastes which have to be disposed of in Britain every year — PFA, blastfurnace and steel slag, quartz sand from china clay working (Gutt, 1972). Slags, clinker and pulverised fuel ash have been predominantly utilised by the construction industry and its associates, whereas colliery discards (particularly unburnt spoil) have only relatively recently been used in significant quantities for large schemes; National Coal Board sales account for some 6-7 million tonnes per annum. 

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