A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Quantitative evaluation of rockburst proneness for surrounding rocks considering combined effects of the structural plane and excavation disturbance
https://orcid.org/0000-0003-0704-0016
https://orcid.org/0000-0002-2040-4294
Highlights A quantitative evaluation model of rockburst proneness for surrounding rocks is proposed. The residual elastic energy is estimated by the geological strength index GSI and disturbance factor D. The empirical theory and wave velocity methods are adopted to quantify GSI and D. The excavation disturbance could reduce the rockburst proneness of surrounding rocks. Multiple disturbances could further expand the low and medium rockburst proneness range.
Abstract Rockburst proneness evaluation is crucial for predicting and preventing rockburst disasters. This study proposes a quantitative evaluation model of rockburst proneness for surrounding rocks. In this model, residual elastic energy is applied as an index to quantitatively evaluate the rockburst proneness, which can be calculated by the geological strength index GSI and disturbance factor D. Furthermore, empirical theory and wave velocity methods are adopted to quantify GSI and D. The results show that the GSI value estimated using acoustic P-wave velocity coincides well with the suggested value. The excavation damage zone (EDZ) around tunnels can be divided into the high-damage zone (HDZ) with D = 1 and weak-damage zone (WDZ) with D linearly decreasing to zero. On this basis, a quantitative evaluation procedure for rockburst proneness is presented and applied to five tunnels. It is found that excavation disturbance could reduce the rockburst proneness of surrounding rocks. The rock mass adjacent to the excavation outline is most severely disturbed, resulting in lower residual elastic energy and more likely to exhibit a low or medium rockburst proneness. With the D linearly decreasing within WDZ, the residual elastic energy first slowly and then rapidly increases, and the rockburst proneness gradually enhances. The residual elastic energy and rockburst proneness is positively correlated with GSI. In addition, significant differences exist in the rockburst proneness distribution at different parts of the excavation section, and multiple disturbances could further expand the low and medium rockburst proneness range.
Quantitative evaluation of rockburst proneness for surrounding rocks considering combined effects of the structural plane and excavation disturbance
https://orcid.org/0000-0003-0704-0016
https://orcid.org/0000-0002-2040-4294
Highlights A quantitative evaluation model of rockburst proneness for surrounding rocks is proposed. The residual elastic energy is estimated by the geological strength index GSI and disturbance factor D. The empirical theory and wave velocity methods are adopted to quantify GSI and D. The excavation disturbance could reduce the rockburst proneness of surrounding rocks. Multiple disturbances could further expand the low and medium rockburst proneness range.
Abstract Rockburst proneness evaluation is crucial for predicting and preventing rockburst disasters. This study proposes a quantitative evaluation model of rockburst proneness for surrounding rocks. In this model, residual elastic energy is applied as an index to quantitatively evaluate the rockburst proneness, which can be calculated by the geological strength index GSI and disturbance factor D. Furthermore, empirical theory and wave velocity methods are adopted to quantify GSI and D. The results show that the GSI value estimated using acoustic P-wave velocity coincides well with the suggested value. The excavation damage zone (EDZ) around tunnels can be divided into the high-damage zone (HDZ) with D = 1 and weak-damage zone (WDZ) with D linearly decreasing to zero. On this basis, a quantitative evaluation procedure for rockburst proneness is presented and applied to five tunnels. It is found that excavation disturbance could reduce the rockburst proneness of surrounding rocks. The rock mass adjacent to the excavation outline is most severely disturbed, resulting in lower residual elastic energy and more likely to exhibit a low or medium rockburst proneness. With the D linearly decreasing within WDZ, the residual elastic energy first slowly and then rapidly increases, and the rockburst proneness gradually enhances. The residual elastic energy and rockburst proneness is positively correlated with GSI. In addition, significant differences exist in the rockburst proneness distribution at different parts of the excavation section, and multiple disturbances could further expand the low and medium rockburst proneness range.
Quantitative evaluation of rockburst proneness for surrounding rocks considering combined effects of the structural plane and excavation disturbance
https://orcid.org/0000-0003-0704-0016
https://orcid.org/0000-0002-2040-4294
Highlights A quantitative evaluation model of rockburst proneness for surrounding rocks is proposed. The residual elastic energy is estimated by the geological strength index GSI and disturbance factor D. The empirical theory and wave velocity methods are adopted to quantify GSI and D. The excavation disturbance could reduce the rockburst proneness of surrounding rocks. Multiple disturbances could further expand the low and medium rockburst proneness range.
Abstract Rockburst proneness evaluation is crucial for predicting and preventing rockburst disasters. This study proposes a quantitative evaluation model of rockburst proneness for surrounding rocks. In this model, residual elastic energy is applied as an index to quantitatively evaluate the rockburst proneness, which can be calculated by the geological strength index GSI and disturbance factor D. Furthermore, empirical theory and wave velocity methods are adopted to quantify GSI and D. The results show that the GSI value estimated using acoustic P-wave velocity coincides well with the suggested value. The excavation damage zone (EDZ) around tunnels can be divided into the high-damage zone (HDZ) with D = 1 and weak-damage zone (WDZ) with D linearly decreasing to zero. On this basis, a quantitative evaluation procedure for rockburst proneness is presented and applied to five tunnels. It is found that excavation disturbance could reduce the rockburst proneness of surrounding rocks. The rock mass adjacent to the excavation outline is most severely disturbed, resulting in lower residual elastic energy and more likely to exhibit a low or medium rockburst proneness. With the D linearly decreasing within WDZ, the residual elastic energy first slowly and then rapidly increases, and the rockburst proneness gradually enhances. The residual elastic energy and rockburst proneness is positively correlated with GSI. In addition, significant differences exist in the rockburst proneness distribution at different parts of the excavation section, and multiple disturbances could further expand the low and medium rockburst proneness range.
Quantitative evaluation of rockburst proneness for surrounding rocks considering combined effects of the structural plane and excavation disturbance
Dai, Jinhao (author) / Gong, Fengqiang (author) / Qi, Shengwen (author) / Xu, Lei (author)
2023-07-21
Article (Journal)
Electronic Resource
English
Rockburst proneness considering energy characteristics and sample shape effects
| DOAJ | 2024
Rockburst proneness considering energy characteristics and sample shape effects
| Elsevier | 2024
Evaluation of rockburst proneness considering specimen shape by storable elastic strain energy
| Wiley | 2022
Evaluation of rockburst proneness considering specimen shape by storable elastic strain energy
| Wiley | 2022
| European Patent Office | 2024