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开发砂金矿,具有易采、易选、收效快、投资少的优点,同时,通过找砂金,又是追寻原生金的一种重要手段. 我国在砂金勘探中,应用班加钻已有40多年的历史.1964年地质部在河北正定首次举办了砂矿钻探工艺训练班,有力地促进了当时砂金矿勘探技术的发展.1980年地质部勘察技术研究院设计研制出SZC-325型大口径自行式机械化砂钻,并首次在砂金矿勘探中使用冲击抓斗和钻斗等新型取样工具获得成功.当然,这只是新的起点,现有的勘
The development of gold and gold deposits, with easy mining, easy to choose, fast, less investment advantages, at the same time, by looking for placer gold, is also an important means of tracing native gold.In China in the exploration of sand, the application of Bangalore 40 Years of history .1964 Department of Geochemistry in Hebei Zhengding held the first sand mine drilling process training class, effectively promoted the development of gold and gold exploration technology at that time. 1980 Institute of Geological Survey and Design Institute developed a SZC-325 large Caliber self-propelled mechanized sand drills, and for the first time succeeded in using new sampling tools such as impact grabs and drills in the exploration of gold and gold. Of course, this is only a new starting point. Existing exploration