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克里沃洛格矿区地质勘探公司技术试验队在严重裂隙的X-XI级含铁石英岩中进行了反循环冲洗的试验钻进.由于采用了铅矿区的反循环冲洗法,岩心采取率提高到86%,而用一般方法钻进仅为19%.
The Kilovar Mine Geological Prospecting Company’s Technical Test Team conducted a pilot drill for reverse circulation flushing in the severe fractured X-grade iron-bearing quartzite due to the use of a recirculation flushing method in the lead mining area to improve core recovery To 86%, compared with just 19% in the usual way.