Reinforcement of rock mass with cross-flaws using rock bolt

Zhang, Bo; Li, Shucai; Xia, Kaiwen; Yang, Xiaoyan; Zhang, Dunfu; Wang, Shugang; Zhu, Jianbo

doi:10.1016/j.tust.2015.10.007

Cited by 42 publications

(14 citation statements)

References 19 publications

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“…Despite much effort, these active defense methods cannot work well, so the best processing method is still using the rock bolts to resist the impact, instability, and rockfall [15][16][17][18][19][20]. Also taking advantage of the principle of energy, the concept of an energy-absorbing bolt was proposed in South Africa in the early 1990s [21].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Testing on Energy Absorption of High‐Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Yang

et al. 2018

Shock and Vibration

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With the increase in mining depth, the deep hard rock mass is under threat of rockburst under high geostress, high temperature, high osmotic pressure, and strong disturbance. To reduce the probability and strength of rockburst, a new energy-absorbing bolt for guaranteeing the stability of deep hard rock mass was developed utilizing the energy absorption characteristic of high-damping rubber. To analyze the practicability and obtain the quantified behaviors of this new energy-absorbing bolt, a series of impact tests on specimens of high-damping rubber, granite, and granite–rubber composite specimens was carried out by a split Hopkinson pressure bar (SHPB) method. Further, considering the different working depths with different rock temperatures, the dynamic energy-absorbing characteristics of high-damping rubber under different temperatures were tested. The testing results show that the new energy-absorbing bolt can consume the storage energy in host rock effectively, and the environmental temperature will produce certain effects on the energy-consuming rate. In addition, the optimal energy-absorbing thickness–diameter ratio of high-damping rubber was confirmed by SHPB tests.

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Section: Introductionmentioning

confidence: 99%

Laboratory Testing on Energy Absorption of High‐Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Yang

et al. 2018

Shock and Vibration

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“…Reinforcement provided by rock bolt is the promotion of the natural self-supporting ability within the host rock mass. Mechanical properties of rock bolt and bolt failures caused by rock mass have been studied extensively in many ways, including laboratory and field tests [1][2][3][4][5][6][7][8][9][10], numerical simulations [11][12][13][14][15][16][17], and analytical method [18][19][20][21][22][23]. And, some scholars study its mechanical properties by analyzing its dynamic response recently [24][25][26][27].…”

Section: Prefacementioning

confidence: 99%

Study of Shear Capacity of Jointed Rock Mass with Prestressed Anchor Bolt

Zhao

Hong-tao

Nie

2019

Advances in Civil Engineering

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Rock mass failure caused by jointed plane is the common disaster in geotechnical engineering. Research on shearing property of jointed rock mass with prestressed anchor bolt and its mechanical property is an aspect for the stability analysis of rock slope and tunnel. This paper studies the stress and deformation of bolt and jointed plane, as well as anchored body and rock mass during shearing by indoor model testing and theoretical analysis. The shearing strength and mechanical property of anchored jointed plane have been systematically studied, and the additional force caused by deformation of prestressed anchor bolt and jointed rock mass during the shearing has been proposed and verified. The anchorage interaction between rock mass and bolt is revealed.

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“…In addition, it prevents the rock mass from developing an intercalated dislocation along the joint plane [11,12]. Many factors affect the reinforcing effect of the bolt on the joint plane, such as the bolt size, hole diameter, pretension force, grouting, and anchored rock mass strength [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

An Investigation into Bolt Anchoring Performance during Tunnel Construction in Bedded Rock Mass

et al. 2020

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The anchor bolt is a key point of tunnel design in bedded rock mass. The previous theory of anchorage support falls does not fulfil engineering requirements, and the stability of bedded rock must be addressed by empirical methods. To investigate the bolt anchoring performance for bedded rock mass under different anchoring methods, the rock failure mode under shear and tensile stresses in bedded rock was examined in this paper. The results showed that bolt anchoring for rock is achieved mainly through the bonded restoration of surrounding rock near the drill holes by means of an anchoring agent and the supporting resistance provided by the bolt body. It was observed that the strength parameters of bedded rock were increased under the anchoring effect. Full anchoring bolts were especially effective. In addition, it was observed that, in the absence of bolts, the failure form changed from shear to split. In the case of bolting, the failure plane occurred parallel to the bolt’s axis. The shearing began along the interface between the hard and soft rock bedding. Compared to end bolt anchoring, full-length bolt anchoring was more capable of offering an anchoring effect. The latter offered a greater increase in the strength and greater shear-bearing capacity of the rock, which ultimately enabled the rock to bear more load.

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Reinforcement of rock mass with cross-flaws using rock bolt

Cited by 42 publications

References 19 publications

Laboratory Testing on Energy Absorption of High‐Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Laboratory Testing on Energy Absorption of High‐Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Study of Shear Capacity of Jointed Rock Mass with Prestressed Anchor Bolt

An Investigation into Bolt Anchoring Performance during Tunnel Construction in Bedded Rock Mass

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