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<p>In the field of polar research, acquiring bedrock samples from beneath polar ice sheets is of great significance for reconstructing ancient climates, exploring ancient life, and studying subglacial geological structures, among other related applications. However, subglacial bedrock core drilling is extremely challenging, and to date, there have been few successful cases, with insufficient subglacial bedrock samples obtained. In comparison with conventional rock core drilling methods, hydraulic reverse circulation continuous coring offers significant advantages. To ensure its successful implementation, rock core breaking is a critical issue. This paper investigates the subglacial bedrock core breaking mechanism, using the maximum breaking force as the criterion. A rock core breaking model is constructed through elastic mechanics analysis, combining rock core breaking experiment with characterization of the breaking surface to analyze the synergistic effects of three critical factors: splitter angle, core diameter and core length on the breaking force. The research ultimately aims to clarify the rock core breaking mechanism and provide theoretical support for the successful implementation and further development of hydraulic reverse circulation automatic isometric rock core breaking technology.</p>

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Model Construction and Research of Synergistic Effect Mechanism on Subglacial Bedrock Core Breaking

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Rusheng Wang,
  • Zhihao Cui,
  • Guigang Tu,
  • Xiaopeng Fan,
  • Da Gong,
  • Siqi Hong,
  • Xinyu Lv

摘要

In the field of polar research, acquiring bedrock samples from beneath polar ice sheets is of great significance for reconstructing ancient climates, exploring ancient life, and studying subglacial geological structures, among other related applications. However, subglacial bedrock core drilling is extremely challenging, and to date, there have been few successful cases, with insufficient subglacial bedrock samples obtained. In comparison with conventional rock core drilling methods, hydraulic reverse circulation continuous coring offers significant advantages. To ensure its successful implementation, rock core breaking is a critical issue. This paper investigates the subglacial bedrock core breaking mechanism, using the maximum breaking force as the criterion. A rock core breaking model is constructed through elastic mechanics analysis, combining rock core breaking experiment with characterization of the breaking surface to analyze the synergistic effects of three critical factors: splitter angle, core diameter and core length on the breaking force. The research ultimately aims to clarify the rock core breaking mechanism and provide theoretical support for the successful implementation and further development of hydraulic reverse circulation automatic isometric rock core breaking technology.