Performance of a New Yielding Rock Bolt Under Pull and Shear Loading Conditions

Wu, Xuezhen; Jiang, Yujing; Wang, Gang; Gong, Bin; Guan, Zhongguo; Deng, Tao

doi:10.1007/s00603-019-01779-8

Cited by 53 publications

(22 citation statements)

References 24 publications

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“…The TCC yielding rock bolt is another bolt which can bear shear force. It has a smooth bar with no or very weak bonding to the grout that can stretch to accommodate rock dilatation (Wu. et al 2019).…”

Section: A C C E P T E Dmentioning

confidence: 99%

Research on the full-section anchor cable and C-shaped tube support system of mining roadway in island coal faces

Shan

Huang

Yuan

et al. 2021

Journal of Asian Architecture and Building Engineering

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Section: A C C E P T E Dmentioning

confidence: 99%

Research on the full-section anchor cable and C-shaped tube support system of mining roadway in island coal faces

Shan

Huang

Yuan

et al. 2021

Journal of Asian Architecture and Building Engineering

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“…The elongation is as long as 300-1000 mm and is realized by the relative displacement of the cone-shank assembly with respect to the sleeve cylinder. Wu et al [16] tested TCC yielding bolt, which consist of a steel rod and two additional anchors and is characterized by elongation equal from 386 to 754 mm for 2500-5000 mm-long bolts. Yokota et al [17] designed DC-bolt, which possesses both the high loading capacity and the deformable capacity.…”

Section: Introductionmentioning

confidence: 99%

Adjustment of the Yielding System of Mechanical Rock Bolts for Room and Pillar Mining Method in Stratified Rock Mass

et al. 2020

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The article presents a novel yielding mechanism, especially designed for the rock bolt support. Mechanical rock bolts with an expansion head and equipped with one, two, four and six dome bearing plates were tested in the laboratory conditions. Furthermore, in the Phase2D numerical program, five room and pillar widths were modeled. The main aim of numerical modeling was to determine the maximal range of the rock damage area and the total displacements in the expanded room. The models were made for a room and pillar method with a roof sag for copper ore deposits in the Legnica-Głogów Copper District in Poland. Additionally, in the article a load model of the rock bolt support as a result of a geomechanical seismic event is presented. Based on the results of laboratory tests (load–displacement characteristics), the strain energy of the bolt support equipped with the yielding device in the form of dome bearing plates was determined and compared with the impact energy caused by predicted falling rock layers. Based on the laboratory tests, numerical modeling and mathematical dynamic model of rock bolt support, the dependence of the drop height and the corresponding impact energy for the expanded room was determined.

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“…He et al [31,32] examined the He bolt equipped with an energy absorber and a steel pipe. Using a sliding pipe inside the hole, the total displacement of the bolt can be up to 1 m. Wu et al [33] proposed a new solution for the rock bolt, a tension and compression-coupled (TCC) yieldable support. A section of the rock bolt in the hole can be fixed either with the use of cement binder or the adhesive.…”

Section: Introductionmentioning

confidence: 99%

Modified Rock Bolt Support for Mining Method with Controlled Roof Bending

et al. 2020

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The article presents methods of making the rock bolt support more yieldable, especially for a stratified roof. Alongside the increasing depth of exploitation of raw material deposits, rock bolt support units are more often designed taking into account more intensive deformations and displacements of underground excavations. In the article, a room and pillar method with mined roof bending and roof reinforcement with bolt patterns of 1 m × 1 m, 1.5 m × 1.5 m and 2 m × 2 m is presented. Moreover, the laboratory tests included 1.8 m long bolts, which were embedded segmentally on the lengths of 100 mm, 150 mm and 200 mm were tested. Based on the load–displacement characteristics, the deformation energy for flat and profiled dome bearing plates was calculated. Making the segmentally embedded resin rock bolt support yieldable enabled it to perform additional work. Furthermore, it was found that rock bolt support with a dome bearing plate took over 2.5 times more energy compared to a rock bolt support equipped with a flat bearing plate.

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Performance of a New Yielding Rock Bolt Under Pull and Shear Loading Conditions

Cited by 53 publications

References 24 publications

Research on the full-section anchor cable and C-shaped tube support system of mining roadway in island coal faces

Research on the full-section anchor cable and C-shaped tube support system of mining roadway in island coal faces

Adjustment of the Yielding System of Mechanical Rock Bolts for Room and Pillar Mining Method in Stratified Rock Mass

Modified Rock Bolt Support for Mining Method with Controlled Roof Bending

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