Empirical estimation of strength of jointed rocks traversed by rock bolts based on experimental observation

Srivastava, Lok Priya; Singh, Mahendra

doi:10.1016/j.enggeo.2015.08.004

Cited by 42 publications

(20 citation statements)

References 11 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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“…Because of the poor conditions, the frequency and intensity of deep engineering disasters increase, threatening the safety of life and property [2]. It is important to study the deformation failure mode, failure characteristics, and roadway failure mechanisms at different depths to ensure safe and efficient production in the mining area [3,4].…”

Section: Introductionmentioning

confidence: 99%

Case Study of Roadway Deformation Failure Mechanisms: Field Investigation and Numerical Simulation

Guo

et al. 2021

Energies

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The safety of underground roadways is a major issue in mining engineering, with economic impacts and potential threats to the lives of workers. Elucidating the deformation failure mechanisms is necessary to solve these problems. The deformation failure modes and characteristics of roadways buried at various depths were investigated using a detailed field survey in the Jinchuan nickel mine. At greater depths, roadway deformation was more serious, the creep phenomena were more prominent, and support structures were more prone to failure. Numerical simulations were performed on the roadways under various geo-stresses and rock mass structures, which indicated that the roadway deformation mode was mainly controlled by a rock mass structure in a lower stress environment and the control effect was weakened with the gradual increase of ground stress. Six deformation failure types were proposed to examine roadway deformation failure mechanisms. Field representation of each failure type was characterized under natural or induced conditions. The findings provide a reference for stability evaluation and support the design of roadway engineering under similar geological conditions.

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“…e study of Li et al [20] showed that there was a linear relationship between critical anchorage length and mortar strength. Srivastava and Singh [21] studied the effect of the passive anchor on the failure mode of crack rock samples and the enhancement of elastic modulus and strength. Hass [22] pointed out that the inclined anchor had stronger effects on the shear strength improvement of the jointed rock than the vertical anchor.…”

Section: Introductionmentioning

confidence: 99%

The Influences of Bladder Properties on the Working Performance of the Multibladder‐Type Inflatable Anchor

Peng

Chen

et al. 2021

Advances in Civil Engineering

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Due to the high bearing capacity and better controllability of bladder parameters, the multibladder-type inflatable anchor shows a great application prospect in the engineering construction in soft soil areas. In this study, based on a soft soil foundation pit project in Guangzhou Province, China, the multibladder-type inflatable anchor was applied to the engineering practice for the first time, and the working characteristics of the multibladder-type inflatable anchor were analyzed and discussed through field experiments. Primarily, the optimization design and experimental facility of the multibladder-type inflatable anchor were introduced in detail to realize the refinement and perfection of the anchorage technological process. Besides, the influence degrees of the bladder number, diameter, thickness, space, and length on the bearing characteristics and deformation control of the anchor were studied by using the control variable method, as well as the influencing mechanisms. Subsequently, the advantages of the multibladder-type inflatable anchor were presented by comparing its anchoring efficacy with that of the traditional grouting anchor. Ultimately, the analysis results were used to verify the reliability of the multibladder-type inflatable anchor and provide the experimental basis for its popularization and application.

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Empirical estimation of strength of jointed rocks traversed by rock bolts based on experimental observation

Cited by 42 publications

References 11 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

Case Study of Roadway Deformation Failure Mechanisms: Field Investigation and Numerical Simulation

The Influences of Bladder Properties on the Working Performance of the Multibladder‐Type Inflatable Anchor

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