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Effect of confining pressures on the drilling parameters and specific energy: Insights into determining in situ stress using drilling monitoring techniques
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Wendal Victor Yuea, Manchao Heb, Hehua Zhua, *, Zhongwen Yueb, Sichen Longb, Mengjia Zhangb
Journal of Rock Mechanics and Geotechnical Engineering | 2026, 18(5) : 3471 - 3482
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Journal of Rock Mechanics and Geotechnical Engineering | 2026, 18(5): 3471-3482
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Effect of confining pressures on the drilling parameters and specific energy: Insights into determining in situ stress using drilling monitoring techniques
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Wendal Victor Yuea, Manchao Heb, Hehua Zhua, *, Zhongwen Yueb, Sichen Longb, Mengjia Zhangb
Affiliations
  • aDepartment of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China
  • bSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    • Wendal Victor Yue is currently a PhD student under the supervision of Prof. Manchao He and Prof. Hehua Zhu in Department of Civil Engineering from Tongji University, China. He received his BSc and MSc from University of Alberta and University of Toronto, Canada, respectively. His research focuses on drilling process monitoring (DPM) for analysing drilling mechanism to characterize the properties of rock and soil.

Published: 2026-05-25 doi: 10.1016/j.jrmge.2025.06.026
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Current in-situ stress determination methods are typically conducted inside a drillhole after its creation. However, the drilling process itself is not utilized for measuring in-situ stress or rock strength, despite being a form of direct mechanical testing on the rock mass. Crucially, drilling contains valuable information about in-situ stress and rock strength, as rocks under high compressive stresses exhibit greater strength. This paper presents a novel in-situ stress determination method, supported by the experimental result of rock drilling monitoring tests using a mine hydraulic-rotary drilling machine. Key drilling parameters-including thrust force, rotation speed, torque and drilling speed-are monitored in real time to determine the drilling specific energy per unit volume of rock. A concave-upward relationship between drilling specific energy and rotation speed is identified, which can characterize rock compressive strength and tensile strength with consistent regularity. Further drilling tests are conducted on the same rock samples under varying confining pressures. Results indicate that as confining pressure increases, the concave-upward curve of drilling specific energy shift upward, reflecting enhanced rock strengths due to confinement. The paper outlines the complete methodology for in-situ stress determination using drilling monitoring techniques, bridging the research gaps among drilling monitoring, rock mechanics, and in-situ stress analysis.

Drilling monitoring test  /  Drilling specific energy  /  In-situ stress determination  /  Confining stresses
Wendal Victor Yue, Manchao He, Hehua Zhu, Zhongwen Yue, Sichen Long, Mengjia Zhang. Effect of confining pressures on the drilling parameters and specific energy: Insights into determining in situ stress using drilling monitoring techniques[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2026 , 18 (5) : 3471 -3482 . DOI: 10.1016/j.jrmge.2025.06.026
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  • National Natural Science Foundation of China(42272338; 41902275)
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Year 2026 volume 18 Issue 5
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Article Info
doi: 10.1016/j.jrmge.2025.06.026
  • Receive Date：2025-02-13
  • Online Date：2026-06-17
  • Published：2026-05-25
Article Data
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History
  • Received：2025-02-13
  • Revised：2025-05-29
  • Accepted：2025-06-02
Funding
National Natural Science Foundation of China(42272338; 41902275)
Affiliations
    aDepartment of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China
    bSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

Corresponding:

* Corresponding author. E-mail address: (H. Zhu).
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
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Number of
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Percentage of
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Genus		 种数
Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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