Prediction of Deep Rock Mass Quality and Spatial Distribution Law of Open-pit Gold Mine Based on 3D Geological Modeling

2021 ◽  
Author(s):  
Zhigang Tao ◽  
Fangzheng Fan ◽  
Xiaojie Yang ◽  
Ziyang Guo ◽  
Gengzhao Li ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Rock Mass ◽  
Open Pit ◽  
Gold Mine ◽  
Geological Modeling ◽  
Distribution Law ◽  
3D Geological Modeling ◽  
Deep Rock Mass ◽  
Rock Mass Quality ◽  
Deep Rock

Rock Mass Quality Prediction of Open-Pit Gold Mine Slope Based on the Kriging Interpolation Method

2020 ◽  
Vol 38 (6) ◽  
pp. 5851-5865 ◽  
Author(s):  
Zhigang Tao ◽  
Xuebin Cui ◽  
Xiaoming Sun ◽  
Jiong Wang ◽  
Kuiming Liu ◽  
...  
Keyword(s):  
Rock Mass ◽  
Interpolation Method ◽  
Open Pit ◽  
Kriging Interpolation ◽  
Quality Prediction ◽  
Gold Mine ◽  
Rock Mass Quality ◽  
Kriging Interpolation Method ◽  
Mine Slope

scholarly journals Research on Failure Mechanism and Parameter Sensitivity of Zonal Disintegration in Deep Tunnel

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Xutao Zhang ◽  
Qiang Gao ◽  
Shicai Cui ◽  
Changrui Duan
Keyword(s):  
Rock Mass ◽  
Failure Mechanism ◽  
Deformation Modulus ◽  
Morphological Characteristics ◽  
Zonal Disintegration ◽  
Deep Tunnel ◽  
Equilibrium Equations ◽  
Distribution Law ◽  
Deep Rock Mass ◽  
Deep Rock

With the increase of excavation depth, the zonal disintegration phenomenon appears in the deep rock mass, which is quite different from the failure mode of shallow tunnel. In order to analyse the failure mechanism of this phenomenon, an elastoplastic softening damage model was put forward based on the softening damage characteristics of deep rock mass. The constitutive equations, the equilibrium equations, and the failure criterion were deduced. The theoretical solutions of radial displacement and radial stresses and tangential stresses of deep surrounding rock mass were calculated. The distribution law of zonal disintegration in deep tunnel was obtained. The theoretical solutions presented an oscillating mode. The theoretical calculated widths of fracture zones were in good agreement with the in situ test data. Besides, the sensitivity of different parameters to fracture morphology was calculated and analysed. The results show that the relative loading strength has a controlling role in the zonal disintegration morphology, followed by the cohesion force and deformation modulus, and the internal friction angle is the least. This study reveals the morphological characteristics and influencing factors of zonal disintegration, which provides a basis for the prediction and support control of fracture modes.

Microseism Induced by Transient Release of In Situ Stress During Deep Rock Mass Excavation by Blasting

2012 ◽  
Vol 46 (4) ◽  
pp. 859-875 ◽  
Author(s):  
Jianhua Yang ◽  
Wenbo Lu ◽  
Ming Chen ◽  
Peng Yan ◽  
Chuangbing Zhou
Keyword(s):  
Rock Mass ◽  
In Situ Stress ◽  
Deep Rock Mass ◽  
Deep Rock

Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Qingteng Tang ◽  
Wenbing Xie ◽  
Xingkai Wang ◽  
Zhili Su ◽  
Jinhai Xu
Keyword(s):  
Rock Mass ◽  
Fracture Zone ◽  
Numerical Study ◽  
Confining Pressure ◽  
Surrounding Rock ◽  
Zonal Disintegration ◽  
Block Model ◽  
Deep Rock Mass ◽  
Damaged Zone ◽  
Deep Rock

Zonal disintegration, a phenomenon of fractured zones and intact zones distributed alternately in deep rock mass, is different from the excavation-damaged zone of shallow rock mass. In this study, bonded block model of 3DEC was employed to study the fracture mode and origination condition of zonal disintegration. Initiation, propagation, and coalescence progress of fracture around the roadway boundary under different triaxial stress conditions are elaborated. Numerical simulation demonstrated that zonal disintegration may occur when the direction of maximum principal stress is parallel to the roadway axis. It is interesting to find that the fracture around the roadway boundary traced the line of a spiral line, while slip-line fractures distributed apart from the roadway boundary. The extent of the alternate fracture zone decreased as the confining pressure increased, and alternate fracture zone was no longer in existence when the confining pressure reaches a certain value. Effects of roadway shape on zonal disintegration were also studied, and the results indicated that the curvature of the fracture track line tends to be equal to the roadway boundary in shallow surrounding rock of the roadway, while the fractures in deep surrounding rock seems unaffected by the roadway shape. Those findings are of great significance to support design of deep underground openings.

Research on Support Technique for Excavation Process of Deep Rock Mass

2013 ◽  
Vol 438-439 ◽  
pp. 1249-1252
Author(s):  
Hong Xiao Wu ◽  
Song Lin Yue ◽  
Cun Cheng Shi ◽  
Xiao Hu ◽  
Cheng Chu ◽  
...  
Keyword(s):  
Rock Mass ◽  
High Strength ◽  
Surrounding Rock ◽  
Support Program ◽  
Tunnel Excavation ◽  
Deep Rock Mass ◽  
Rock Stability ◽  
Excavation Process ◽  
Deep Rock ◽  
Fracturing Mechanism

In the deep rock mass surrounding, rock burst, large deformation, zonal fracturing and phenomena like these may occur in the tunnel excavation process. When zonal fracturing happens, it is essential to reconsider the types of support, the boundary of support and the approach of tunnel excavation. In this paper, the control theory about the surrounding rock stability under high pre-existing stresses was researched, and the efficient support form which was the combination of high strength anchor bar and anchor cable was ascertained to be adaptive to deep tunnel excavation. According to the deformation and zonal fracturing mechanism of the surrounding rock, a comprehensive support program that combined intensive short anchor bars and long anchor cables was established, and the numerical simulation was carried out to verify the feasibility of the support form.

scholarly journals Application Research Of 3D Digital Evaluation And Analysis Method In Geological Engineering

2021 ◽  
Author(s):  
Gao Jing ◽  
Zhou Weibo ◽  
Li Shuwu ◽  
Li Changhu ◽  
Wang Xiaobing
Keyword(s):  
Rock Mass ◽  
Engineering Geology ◽  
Hydropower Station ◽  
Analysis Method ◽  
3D Geological Modeling ◽  
Geological Engineering ◽  
Rock Mass Quality ◽  
Quality Classification ◽  
Digital Evaluation ◽  
Rock Mass Quality Classification

Abstract In order to adapt to the construction and development of informatization and digitization of engineering survey industry, a method of rock mass quality classification based on 3D geological modeling analysis is proposed. Based on a hydropower station as an example, this paper build a refinement 3D geological visualization model, simulate and analysis engineering geology of the hydropower station from the perspective of the three-dimensional digital. According to features of rock mass damage and elastic-plastic mechanics of dissipation energy principle, which gives the optimize evaluation index and method of rock mass quality classification in water resources and hydropower engineering, endowed with classification attribute values of each level and restructured model shows the spatial distribution characteristics of rock mass quality. In conclusion, this method improves the efficiency and intuitiveness of the engineering geology analysis and engineering rock mass quality classification. Furthermore, the 3D digital evaluation method was verified more rationality and intuitiveness in geological engineering comparing with traditional 2D geological analysis method.

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