Geological Report on the No 2 Drift Wyee State Coal Mine

Abstract

The No. 2 Drift, Wyee State Coal Mine, excavated for the State Coal Mines Authority is inclined at approximately seventeen (17) degrees, intersecting flat lying strata within the Permo-Triassic Sydney Basin. Correlateable beds penetrated include the Munmorah Conglomerate of the Narrabeen Group, and the Wallarah Seam, Teralba Conglomerate and the Great Northern Seam of the Newcastle Coal Measures. Both seams encountered were commercial with few clay bands. The conglomerates were very similar, the only variance being at the top of the Munmorah Conglomerate. At this point pebble counts revealed more greenish grey shale and fewer sandstone. Chert was the major constituent. Shale horizons and a small dolerite dyke were the only visible complications to tunnel stability.