Jonak Józef, Karpiński Robert, Wójcik Andrzej, Siegmund Michał, Kalita Marek
Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
KOMAG Institute of Mining Technology, Pszczyńska 37, 44-100 Gliwice, Poland.
Materials (Basel). 2022 Jan 23;15(3):851. doi: 10.3390/ma15030851.
This paper presents the idea and provides an analysis of the rock breakout mechanism utilizing an undercut/breakout anchor. The new design is a modification of a standard undercut anchor, which is commonly found in applications involving steel-to-concrete anchorage. Of particular concern was the effect of the rock breakout strength on the anchor-pullout-induced failure of the rock mass. A numerical analysis was employed to model the effect of the changes to the shape and size of the breakout cones under varying rock strength conditions as a result of modifying the anchor design and loading pattern. The problem in question is pivotal for the potential evaluation of the effectiveness of the said anchor design under the non-standard conditions of its utilization.
本文提出了利用底切/破岩锚杆的破岩机理的想法并进行了分析。新设计是对标准底切锚杆的改进，标准底切锚杆常见于钢与混凝土锚固的应用中。特别关注的是岩石破断强度对锚杆拔出引起的岩体破坏的影响。采用数值分析方法，模拟了在不同岩石强度条件下，由于修改锚杆设计和加载模式而导致的破岩锥形状和尺寸变化的影响。所讨论的问题对于评估所述锚杆设计在非标准使用条件下的有效性至关重要。
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