The Rotary Diamond Boring Warks at the Abuta Mine

Abstract

Siuce 1951 the rotary diamond boring works have been done at the Abuta Iron Pyrite and Sulpher Mine, Hokkaido, Japan and three drillingworks have been performed up to date for the special purposes of :
(1) Drilling hole to penetrate the strong acid water which streams from main level tunnel.
(2) Large diameter (7") drilling to take samples for smelting.
(3) Liquidity test of underground water around the deposit by using drilling hole.
On this report we wish to refer to the actual acievement and others of the prospecting drilling and the drilling for the liquidity test of under ground water.