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A new percussion hammer mechanism for a borehole deployable subglacial sediment corer
Annals of Glaciology ( IF 2.9 ) Pub Date : 2020-12-21 , DOI: 10.1017/aog.2020.83 Keith Makinson , Daniel Ashurst , Paul G. D. Anker , James A. Smith , Dominic A. Hodgson , Peter E. D. Davis , Andrew M. Smith
Annals of Glaciology ( IF 2.9 ) Pub Date : 2020-12-21 , DOI: 10.1017/aog.2020.83 Keith Makinson , Daniel Ashurst , Paul G. D. Anker , James A. Smith , Dominic A. Hodgson , Peter E. D. Davis , Andrew M. Smith
Subglacial sediments have the potential to reveal information about the controls on glacier flow, changes in ice-sheet history and characterise life in those environments. Retrieving sediments from beneath the ice, through hot water drilled access holes at remote field locations, present many challenges. Motivated by the need to minimise weight, corer diameter and simplify assembly and operation, British Antarctic Survey, in collaboration with UWITEC, developed a simple mechanical percussion corer. At depths over 1000 m however, manual operation of the percussion hammer is compromised by the lack of clear operator feedback at the surface. To address this, we present a new auto-release-recovery percussion hammer mechanism that makes coring operations depth independent and improves hammer efficiency. Using a single rope tether for both the corer and hammer operation, this modified percussion corer is relatively simple to operate, easy to maintain, and has successfully operated at a depth of >2130 m.
中文翻译:
一种用于钻孔可展开冰下沉积物取芯器的新型冲击锤机构
冰下沉积物有可能揭示有关冰川流动控制、冰盖历史变化和这些环境中生命特征的信息。通过在偏远地区的热水钻孔取回冰下的沉积物存在许多挑战。出于减轻重量、减少取芯器直径和简化组装和操作的需要,英国南极调查局与 UWITEC 合作开发了一种简单的机械冲击式取芯器。然而,在超过 1000 m 的深度,冲击锤的手动操作会因地面缺乏明确的操作员反馈而受到影响。为了解决这个问题,我们提出了一种新的自动释放-恢复冲击锤机制,使取芯操作深度独立并提高锤效率。
更新日期:2020-12-21
中文翻译:
一种用于钻孔可展开冰下沉积物取芯器的新型冲击锤机构
冰下沉积物有可能揭示有关冰川流动控制、冰盖历史变化和这些环境中生命特征的信息。通过在偏远地区的热水钻孔取回冰下的沉积物存在许多挑战。出于减轻重量、减少取芯器直径和简化组装和操作的需要,英国南极调查局与 UWITEC 合作开发了一种简单的机械冲击式取芯器。然而,在超过 1000 m 的深度,冲击锤的手动操作会因地面缺乏明确的操作员反馈而受到影响。为了解决这个问题,我们提出了一种新的自动释放-恢复冲击锤机制,使取芯操作深度独立并提高锤效率。