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Rock Mechanics and Rock Engineering OnlineFirst articles

Open Access 23.02.2024 | Original Paper

Enhanced Identification of Fracture Smectites and Other Alteration Minerals Via Short-Wave Infrared Reflectance at Two Finnish Crystalline Sites, Olkiluoto and Hyrkkölä

Fracture filling minerals and the smectite-group clay minerals in particular play a significant role in the geotechnical stability of the fractured rock mass. Smectites have multiple uses as geomaterials in waste management solutions, of which the …

verfasst von:
H. M. Reijonen, T. Elminen, P. Heikkilä, J. Kuva, E. M. Jolis

23.02.2024 | Original Paper

Experimental and Mechanical Analysis of the Yielding Support Behavior of a Novel Compact Yielding Anchor Cable

Development of a novel compact yielding anchor cable aims to address the demand for anchorage support in deep rock masses that experience significant deformation. This innovative cable utilizes the combined energy release principles of the …

verfasst von:
Bo Wang, Zhenyu Wang, Xinxin Guo, Jie Dong, Zhijiao Wang

23.02.2024 | Original Paper

Measurement and Assessment of the In-Situ Stress of the Shazaoyuan Rock Block, a Candidate Site for HLW Disposal in Northwest China

For the assessment of the long-term stability of deep geological repositories of high-level radioactive waste (HLW), the information on in-situ stress field is a key parameter. We recently performed a great number of hydraulic fracturing tests …

verfasst von:
Xianghui Qin, Xingguang Zhao, Chongyuan Zhang, Pengfei Li, Qunce Chen, Ju Wang

21.02.2024 | Original Paper

Rockburst-Specific Flexible Protection Net (RFPN) for Tunnels: Creation, Characteristics, and Preliminary Application

In this study, the principle of the protection net used for rocks falling from a slope was adapted to develop a prototype of a flexible protection net system, which includes a wire-rope net, support cables, and expansion-type anchor bolts for …

verfasst von:
Jieling Tang, Tianbin Li, Peng Zeng

21.02.2024 | Original Paper

An Improved GPU-Parallelized 2D/3D Elastoplastic-Damage-Fracture Joint Framework for Combined Finite–Discrete-Element Program

The combined Finite–Discrete-Element Method (FDEM) has demonstrated significant advantages in simulating the fracture and fragmentation process of brittle materials. However, the use of simple elastic-damage model alone is insufficient to meet the …

verfasst von:
Bo-nan Zhang, Bo Han, Qingsong Zhang

20.02.2024 | Original Paper

Revealing the Influence of Grain Size on Failure Mechanisms and Acoustic Emission Characteristics in Thermally Treated Crystalline Rock: Insights from Moment Tensor Inversion

Acoustic emission (AE) is an effective tool for revealing the rock failure mechanism. However, research has found that over 90 $$\%$$ % of test tensile failure sources cannot be captured. Furthermore, previous studies on thermal damage and AE …

verfasst von:
Yike Dang, Zheng Yang, Xiaoyu Liu

19.02.2024 | Original Paper

Effect of Roof Cutting Technology on Broken Roof Rock Bulking and Abutment Stress Distribution: A Physical Model Test

The no-pillar longwall mining method (NPLM) by roof cutting technology (RCT) is an innovative longwall mining method proposed in China. Its essential technology is the employment of RCT to replace the chain pillar to safeguard the roadway. In this …

verfasst von:
Gang Yang, Xiaojie Yang, Jun Zhang, Manchao He, Zhenli Hao, Fan Yang, Jianfu Shao

19.02.2024 | Original Paper

Dual-scale 3DEC-GBM Discrete Element Simulation On Mechanical Behavior and Anisotropic Fracture Evolution Mechanism of Rock Induced by True Three-dimensional Stress

The excavation of deep underground engineering causes a sophisticated three-dimensional stress redistribution in the surrounding rock, leading to the damage and rupture of the surrounding rock. It is difficult to reveal the fracture mechanism of …

verfasst von:
Zhi Zheng, Shouxin Li, Zhengyun Qin, Qiang Zhang

19.02.2024 | Original Paper

Punching Mechanism of Air-Deck Stemming for Drilling Blasting and Its Influence on Rock Fragmentation

Nowadays, the blasting volume and the corresponding explosive demand have been increasing more and more with the continuous growth of open-pit mining projects. There is a substantial waste of explosive energy due to fly-rock and vibration in the …

verfasst von:
Yong Fan, Jing Chen, Zhendong Leng, Guangdong Yang, Xuefeng Liu, Bin Tian

18.02.2024 | Original Paper

Study on the Effect of Bedding Plane and Loading Style on Fracture Process Zone in Coal

In this study, we conduct the single-edge notched beam (SENB) test to study the influence of bedding planes and loading style on the fracture properties and acoustic emission (AE) characteristic parameters in coal. The DIC and AE methods are …

verfasst von:
Zaiyong Wang, Weiguo Liang, Haojie Lian, Yuedu Chen, Wenda Li, Hecheng Xiao

18.02.2024 | Original Paper

Crack Evolution and Failure Mechanisms of Rock Specimens with Oblique Cylindrical Holes in Biaxial Compression Tests

Due to the angular deviation between the tunnel axis and the in-situ principal stress direction, the stress conditions of deep surrounding rocks become more notably intricate, giving rise to significant engineering geological disasters. This study …

verfasst von:
Du Kun, Niu Tengfei, Sun Yu, Zhou Jian, Liu Jian, Wang Shaofeng, Liu Kai

16.02.2024 | Original Paper

Three-Dimensional Simulation for Radon Migration in Fractured Rock Masses: A Computational Modeling Approach

Numerical simulation of radon migration in fractured rock masses is crucial for environmental radon pollution protection, radon tracing technology and the co-exploitation of coal and uranium resources. This paper proposed a novel model based on a …

verfasst von:
Shengyang Feng, Wenhao Wang, Yong Liu, Changshou Hong, Hong Wang, Rong Yang

15.02.2024 | Original Paper

Crack Coalescence Mechanism and Crack Type Determination Model Based on the Analysis of Specimen Apparent Strain Field Data

Clarifying the crack coalescence mechanism and defining crack types within flawed rock formations offer significant advantages for understanding the failure process of geomaterials in practical geotechnical engineering. This article presents …

verfasst von:
Tao Dong, Ju Wang, Weiming Gong, Fei Wang, Hongguang Lin, Wengbo Zhu

15.02.2024 | Original Paper

Semi-analytical Study for Cylindrical Tunnels Reinforced by Bolt-Grouting in Elastic–Brittle–Plastic Surrounding Rock Considering Nonlinear Seepage

The bolt-grouting reinforcement method can reduce water inflow and reinforce the surrounding rock in a tunnel. However, analytical theories on bolt-grouting reinforcements that consider nonlinear seepage in water-rich tunnels are few. This study …

verfasst von:
Wenzhu Ma, Xiaomin Zhou, Yixiang Song, Song Zhang, Tao Wu, Jiwei Zhang, Yong Liu

15.02.2024 | Original Paper

A thermal–mechanical coupled DEM model for deep shale reservoir: the effects of temperature and anisotropy

This paper presents a new thermal–mechanical coupled numerical approach to investigate the effects of temperature and inherent anisotropy on deep reservoir shale. The proposed method combines the discrete element method (DEM) with thermal …

verfasst von:
Ziyang Zhou, Fengshou Zhang, Haifeng Fu, Nailing Xiu, Baoshan Guan, Bo Cai

15.02.2024 | Original Paper

Experimental Investigation on Failure Mechanism and Rockburst Process of Tunnels Under Different Span-Ratios and Existing Structural Planes

The failure mechanism of surrounding rock and the formation of rockburst in deep rockmass are influenced by various factors such as in-situ stress, geological conditions and excavation methods. In this paper, to investigate the impact of …

verfasst von:
Ziquan Chen, Chuan He, Bo Wang, Quanyou Yuan, Changwei Jiang, Song Yuan, Xibao Wang

13.02.2024 | Technical Note

A Limit Equilibrium Method for Analyzing Multi-sliding-Plane Block Stability and Its Application in the Optimal Design of a Gravity Dam Foundation

A block limit equilibrium analysis method is proposed based on the respective advantages of block theory and three-dimensional rigid limit equilibrium method. This method perfectly explains the continuous transformation from double-plane sliding …

verfasst von:
Shan Dong, Qihua Zhang, Zhijie Mai, Heng Zhang

13.02.2024 | Correction

Correction to: Analysis of Near‑Field Stresses in an Analogue Strike‑Slip Fault Model

verfasst von:
Zhandong Su, Sizhe Zhou, Arno Zang, Jinzhong Sun, Tao Zhang, Yao Niu, Jianyong Zhang, Jinping Liang

12.02.2024 | Original Paper

Evaluation of the Rock Mass Strength for Hard Rock Pillar Design Using Bonded Block Models

The estimation of rock mass strength is a crucial step in pillar design. While the tri-linear (or S-shaped) failure criterion has been proposed to estimate the strength of massive to moderately jointed hard rock masses at low confinement, it …

verfasst von:
Farzaneh Hamediazad, Navid Bahrani

11.02.2024 | Original Paper

OpenMP Parallel Finite-Discrete Element Method for Modeling Excavation Support with Rockbolt and Grouting

In the past, the number of CPU cores/threads was usually less than 8/16; now, the maximum number is 128/256. As a CPU-based parallel method, OpenMP has an increasing advantage with the increase in CPU cores and threads. A parallel combined …

verfasst von:
Zhongwei Wang, Feng Li, Guodong Mei