文章基本信息

标题：Air reverse circulation at the hole bottom in ice-core drilling
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作者：ZHENGYI HU ; PAVEL TALALAY ; ZHICHUAN ZHENG 等
期刊名称：Journal of Glaciology
印刷版ISSN：0022-1430
电子版ISSN：1727-5652
出版年度：2019
卷号：65
期号：249
页码：149-156
DOI：10.1017/jog.2018.95
出版社：Cambridge University Press
摘要：Ice-core drilling to depths of 200–300 m is an important part of research studies concerned with paleoclimate reconstruction and anthropogenic climate change. However, conventional drilling methods face difficulties due to firn permeability. We have developed an electromechanical ice-core drill with air reverse circulation at the hole bottom. We believe that the new drilling system will recover ice cores faster than shallow auger drills, with high efficiency and low energy consumption. The theoretically estimated up-hole speed of the airflow should be not −1 to allow proper removal of ice cuttings from the borehole bottom. The computer simulation and test results showed that the design of the new ice-coring drill is feasible. The maximum allowed penetration rate depends by square law on airflow.
关键词：ice coring;ice engineering;polar firn