Influence of Anchor Depth and Friction Coefficient Between Anchor and Rock on the Trajectory of Rock Masses Detachment

• Autorzy: Jonak Józef , Karpiński Robert , Wójcik Andrzej

Identyfikatory

DOI

10.12913/22998624/170301

• Języki publikacji: EN

Abstrakty

EN

This work presents the results of a FEA (Finite Element Analysis) concerning the propagation of the fracture tra- jectory during the detachment of rock masses. The analysis considers mechanical anchoring parameters, including the depth of anchoring and the friction between the anchor head and the brittle material. The analysis involved varying the effective anchorage depth hef = 50, 100, and 150 mm, along with considering different coefficients of friction (μ) for the anchor head against the rock, including 0.15, 0.3, and 0.45. The results indicated that within the chosen range of anchorage depths, the extent of damage increases with the depth of anchor embedment. However, the depth of anchoring, considering the studied range of this parameter and the assumed mechanical properties of the rock, did not have a significant effect on the value of the angle cone (α0) during the initial phase of the medium’s destruction. For the friction coefficient μ = 0.15, there is a clear deep penetration into the fracture at its initial stage of development (at the initial angle of α0 = -20°), promoting further spread of the fracture on the free surface. For larger values of the friction coefficient (μ = 0.3 and 0.45) – the trend is less pronounced (α0 = -2°÷-8°) resulting in a decrease in the crack range.

Słowa kluczowe

EN

rock mechanics; mining; sandstone; rock; undercut anchors; FEM; friction; CCD; Abaqus

• 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: 2023
• Tom: Vol. 17, no 4
• Strony: 290--298
• Opis fizyczny: Bibliogr. 51 poz., fig., tab.

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

• https://orcid.org/0000-0001-6329-5764

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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).