The Effect of Undercut Anchor Diameter on the Rock Failure Cone Area in Pullout Tests

• Autorzy: Jonak Józef , Karpiński Robert , Wójcik Andrzej , Siegmund Michał

Identyfikatory

DOI

10.12913/22998624/154894

• Języki publikacji: EN

Abstrakty

EN

The numerical analysis was conducted using the FEM ABAQUS software to establish the impact of various undercut anchor diameters on the rock breakout cone formation. The central focus of the investigations was on the rock breakout prism, which tends to be approximated to a cone or a quadrilateral pyramid, including its characteristic parameter, the angle of failure cone . Assuming that the embedment depth and the undercut anchor head angle were constant for the considered range of anchor head diameters, it remains unclear, however, precisely how the anchor head diameter affects the value of the failure cone angle, and thus the surface area of the full breakout prism. This conclusion stands in confirmation of our former considerations regarding the impact of the anchor head angle on the size of the breakout surface. Furthermore, it is supported by the results obtained from the mechanical model simulation of the anchor-rock system, where the anchor head angle and the effective embedment depth were determined as significant factors affecting the assumed rock breakout failure. The underlying aspect of the reported investigation was to evaluate the effectiveness of the non-conventional rock breakout technology performed with an undercut anchor, whose primary factors were both the pullout force and the assumed volume of the rock cone.

Słowa kluczowe

EN

rock mechanics; fracture mechanics; rock destruction; concrete breakout failure; numerical modelling of fracture

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2022
• Tom: Vol. 16, no 5
• Strony: 261–270
• Opis fizyczny: Bibliogr. 65 poz., fig.

Twórcy

autor

Jonak Józef

• Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

• https://orcid.org/0000-0003-4658-4569

autor

Karpiński Robert

• Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

• https://orcid.org/0000-0003-4063-8503

autor

Wójcik Andrzej

• Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

autor

Siegmund Michał

• KOMAG Institute of Mining Technology, Pszczyńska 37, 44-100 Gliwice, Poland

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).