A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of surrounding rock stability by optimizing Hoek-Brown criterion parameters under blasting loads
https://orcid.org/http://orcid.org/0000-0001-8984-9809
Dynamic loads due to blasting will affect the mechanical properties of rock masses and form an excavation damage zone (EDZ). The rock mass properties within the EDZ are obtained by the geological strength index (GSI) and disturbance factor (D) in the Hoek-Brown criterion. In order to avoid the subjectivity of GSI evaluation, a stochastic-deterministic 3D discrete fracture network (DFN) is constructed to quantify the GSI. The D value is considered to be a value that varies with depth within the EDZ, rather than a fixed value. Quantitative blasting vibration data is used to determine the disturbance factor rather than qualitatively estimated values. When the disturbance factor decreases linearly within the EDZ, the mechanical properties of the rock mass increase linearly to the undamaged value. Numerical simulation is used to analyze the influence of linear decrease of the rock mass properties on the stability evaluation of the tunnel. The results show that different rock mass parameters have a great influence on tunnel convergence and settlement values. The method described in this paper helps to evaluate the stability of surrounding rock more objectively and accurately.
Evaluation of surrounding rock stability by optimizing Hoek-Brown criterion parameters under blasting loads
https://orcid.org/http://orcid.org/0000-0001-8984-9809
Dynamic loads due to blasting will affect the mechanical properties of rock masses and form an excavation damage zone (EDZ). The rock mass properties within the EDZ are obtained by the geological strength index (GSI) and disturbance factor (D) in the Hoek-Brown criterion. In order to avoid the subjectivity of GSI evaluation, a stochastic-deterministic 3D discrete fracture network (DFN) is constructed to quantify the GSI. The D value is considered to be a value that varies with depth within the EDZ, rather than a fixed value. Quantitative blasting vibration data is used to determine the disturbance factor rather than qualitatively estimated values. When the disturbance factor decreases linearly within the EDZ, the mechanical properties of the rock mass increase linearly to the undamaged value. Numerical simulation is used to analyze the influence of linear decrease of the rock mass properties on the stability evaluation of the tunnel. The results show that different rock mass parameters have a great influence on tunnel convergence and settlement values. The method described in this paper helps to evaluate the stability of surrounding rock more objectively and accurately.
Evaluation of surrounding rock stability by optimizing Hoek-Brown criterion parameters under blasting loads
https://orcid.org/http://orcid.org/0000-0001-8984-9809
Dynamic loads due to blasting will affect the mechanical properties of rock masses and form an excavation damage zone (EDZ). The rock mass properties within the EDZ are obtained by the geological strength index (GSI) and disturbance factor (D) in the Hoek-Brown criterion. In order to avoid the subjectivity of GSI evaluation, a stochastic-deterministic 3D discrete fracture network (DFN) is constructed to quantify the GSI. The D value is considered to be a value that varies with depth within the EDZ, rather than a fixed value. Quantitative blasting vibration data is used to determine the disturbance factor rather than qualitatively estimated values. When the disturbance factor decreases linearly within the EDZ, the mechanical properties of the rock mass increase linearly to the undamaged value. Numerical simulation is used to analyze the influence of linear decrease of the rock mass properties on the stability evaluation of the tunnel. The results show that different rock mass parameters have a great influence on tunnel convergence and settlement values. The method described in this paper helps to evaluate the stability of surrounding rock more objectively and accurately.
Evaluation of surrounding rock stability by optimizing Hoek-Brown criterion parameters under blasting loads
Bull Eng Geol Environ
Xie, Xiaokun (author) / Shi, Shaoshuai (author) / Hu, Jie (author) / Guo, Weidong (author) / Zhao, Ruijie (author)
2024-12-01
Article (Journal)
Electronic Resource
English
Blasting load , Stochastic-deterministic DFN , Disturbance factor , GSI , Surrounding rock instability Engineering , Resources Engineering and Extractive Metallurgy , Earth Sciences , Geotechnical Engineering & Applied Earth Sciences , Geoengineering, Foundations, Hydraulics , Geoecology/Natural Processes , Nature Conservation , Earth and Environmental Science
Back analysis of rock parameters for Hoek-Brown criterion
| British Library Conference Proceedings | 1999
Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules
| Springer Verlag | 2024
Infinite Rock Slope Analysis with Hoek–Brown Failure Criterion
| Online Contents | 2023