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中空钎杆是矿山采掘工业的基本工具,为了大力发展采掘工业,大打矿山之仗,必须迅速提高中空钎杆的质量。为了确保优质中空钎杆的供应,以满足冶金矿山机械化作业的需要,我厂于1973年9月至1974年3月先后生产了三批中空钎杆,并在红透山铜矿,华铜铜矿及龙烟铁矿等地进行了井下凿岩试验。钎杆平均寿命已超过100米,最高已达224米,最近,又在河北铜矿试验了一
Hollow drill rod is the basic mining industry tools, in order to vigorously develop the mining industry, fight the battle of the mine, the hollow rod must be rapidly improve the quality. In order to ensure the supply of high-quality hollow rod, to meet the needs of mechanized mining and metallurgical operations, I plant in September 1973 to March 1974 has produced three sets of hollow rod, and in Hongtoushan copper mine, China Copper Mine and Longyan iron ore underground drilling carried out. The average life expectancy of the drill rod has exceeded 100 meters, reaching a maximum of 224 meters. Recently, another experiment was conducted at the Hebei Copper Mine