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1976年8～11月,在攀枝花冶金矿山公司兰尖铁矿对球墨铸铁柱齿钻头进行了小批量标定试验。试验使用矿山改进过的液压钻机和73-φ200型钻机,穿凿的矿岩种类主要有:流层状辉长岩(f=12～14),含铁辉长岩(f=16),兰山二、三层铁(f=12)及大理岩(f=8)。共试验14个钻头,其中7个因钎尾与卡钎套配合不好,中途掉入孔中不记进米外,其余7个钻头总进米1528米,平均寿命是218米,掉齿率(掉
From August to November 1976, a small batch calibration test was conducted on the nodular cast iron column spur bit in Lanjian Iron Mine, Panzhihua Metallurgical Mine Company. Tests using the mine improved drilling rig and 73-φ200 type drilling rig, the type of rock chipping ore mainly include: fluvial gabbro (f = 12 ~ 14), iron gabbro (f = 16) Second, third iron (f = 12) and marble (f = 8). A total of 14 drill bits were tested, of which 7 were poorly matched with the card solder drill sleeves, halfway into the hole did not record the meter, the remaining seven drill total meter 1528 meters, the average life expectancy is 218 meters, (Off