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我矿坑下采矿使用 YG-80型凿岩机打中深炮孔。过去,钎尾最高寿命还达不到一百米,有的打几米就坏了。后来,在学习承钢大庙铁矿的经验的基础上,作了改进,平均寿命达700米以上,最高的一根达1800米。钎尾材质为40Cr。渗碳温度900～920℃,
Mine mine using YG-80 rock drill hit the deep hole. In the past, the highest life expectancy reached less than one hundred meters, some of them hit a few meters. Later, on the basis of learning from the experience of Chengdang Dao iron mine, the average life span was 700 meters and the highest one reached 1800 meters. Shank material is 40Cr. Carburizing temperature 900 ~ 920 ℃,