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<p>Rock cutting by abrasive water jet (AWJ) is a process of energy transfer, absorption, and dissipation. To investigate how stress affects rock energy absorption during the cutting process, a series of mobile AWJ cutting experiments were conducted on sandstone specimens. Initially, "penetrating" AWJ cutting experiments were performed on sandstone specimens of varying thicknesses (20&#xa0;mm, 30&#xa0;mm, 50&#xa0;mm) to measure the striation morphology. Subsequently, "non-penetrating" cutting experiments were performed on sandstone with a thickness of 70&#xa0;mm under stress-free, uniaxial stress, and biaxial stress states, respectively. Based on these experimental measurements, a model was established to quantitatively evaluate rock energy absorption throughout the entire cutting process, introducing "energy absorption intensity" to characterize energy absorption efficiency. The established model was then utilized to analyze the impact of stress states on cutting performance. Results demonstrate that the model, for the first time, demarcates the cutting wear zone and the deformation wear zone from an energy dissipation perspective. It predicts that approximately 6% of the jet input energy is additionally dissipated via abrasive collisions and the "buffer layer" effect at the slot bottom. Furthermore, this study establishes a stress-independent relationship between energy absorption intensity and cutting depth, proving that cutting depth is intrinsically determined by energy absorption intensity. An increase in stress diminishes the rock's energy absorption intensity, resulting in a nearly linear reduction in cutting depth, with biaxial stress exerting a substantially stronger inhibitory effect on energy absorption than uniaxial stress.</p>

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Energy Absorption Model and Mechanism of Abrasive Water Jet Cutting on Sandstone Under Stress Based on Cutting Striations

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Yiyu Lu,
  • Houhan Pu,
  • Qinglin Deng,
  • Zhaolong Ge,
  • Zhuolin Shi,
  • Jianming Shangguan,
  • Yuhuai Cui,
  • Zhi Yao,
  • Yunliang Wang

摘要

Rock cutting by abrasive water jet (AWJ) is a process of energy transfer, absorption, and dissipation. To investigate how stress affects rock energy absorption during the cutting process, a series of mobile AWJ cutting experiments were conducted on sandstone specimens. Initially, "penetrating" AWJ cutting experiments were performed on sandstone specimens of varying thicknesses (20 mm, 30 mm, 50 mm) to measure the striation morphology. Subsequently, "non-penetrating" cutting experiments were performed on sandstone with a thickness of 70 mm under stress-free, uniaxial stress, and biaxial stress states, respectively. Based on these experimental measurements, a model was established to quantitatively evaluate rock energy absorption throughout the entire cutting process, introducing "energy absorption intensity" to characterize energy absorption efficiency. The established model was then utilized to analyze the impact of stress states on cutting performance. Results demonstrate that the model, for the first time, demarcates the cutting wear zone and the deformation wear zone from an energy dissipation perspective. It predicts that approximately 6% of the jet input energy is additionally dissipated via abrasive collisions and the "buffer layer" effect at the slot bottom. Furthermore, this study establishes a stress-independent relationship between energy absorption intensity and cutting depth, proving that cutting depth is intrinsically determined by energy absorption intensity. An increase in stress diminishes the rock's energy absorption intensity, resulting in a nearly linear reduction in cutting depth, with biaxial stress exerting a substantially stronger inhibitory effect on energy absorption than uniaxial stress.