Long-Hole Drilling for Gas Emission Control at Appin Colliery NSW, Australia

Kelly M, ; Saghafi A, ; Williams R J,
Organization: The Australasian Institute of Mining and Metallurgy
Pages: 0
Publication Date: Jan 1, 1988
A two year program of research into the feasibility of long-hole drilling for improved gas emission control has been undertaken at Appin Colliery. State of the art equipment was employed involving cableless electronic surveying and down-hole motor drilling. The project involved the drilling of 1000 m long, in-seam boreholes in the Bulli seam and boreholes of similar length drilled cross measure and then in-seam along the underlying Balgownie seam. A new concept for gas drainage was defined, employing long-holes for both predrainage and post drainage.
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