Topic Editors

School of Resources and Safety Engineering, Central South University, Changsha 410083, China
School of Civil Engineering, Southeast University, Nanjing 210096, China
School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Failure Characteristics of Deep Rocks, Volume II

Abstract submission deadline
closed (31 March 2024)
Manuscript submission deadline
31 May 2024
Viewed by
4054

Topic Information

Dear Colleagues,

In recent decades, the design and construction of geotechnical engineering, such as mines, tunnels, hydropower stations and nuclear waste repositories, have been surging in scale, and this trend is expected to continue in the future. These large-scale engineering projects are closely related to geomaterials (such as rock and soil) and geomechanics. When rock engineering enters increasingly deep exploitations, two critical scientific problems pose a serious threat to people's life and property, the construction efficiency of projects and the ecological environment. For one thing, geological disasters, including rockburst, landslide and slabbing, frequently occur during the construction and operation of rock projects as the geostress becomes higher. Scientists aim to prevent the instability and breakage of surrounding rock. Meanwhile, researchers and workers seek to break hard rock efficiently in the excavation process. Therefore, the investigation and better understanding of the mechanical and fracture behavior of deep rocks is of key importance to the scientific design and safe operation of deep rock engineering. This Topic is dedicated as a specific platform for all geomechanics research. This Topical Section can serve as the missing link between applied and fundamental research journals. Therefore, “Failure Characteristics of Deep Rock” is dedicated to, and thus welcomes, all geo-based scientific research in order to deepen the understanding of deep geohazards. Authors are therefore invited to submit their relevant research contributions to this Topic.

Prof. Dr. Diyuan Li
Dr. Zhenyu Han
Dr. Xin Cai
Topic Editors

Keywords

  • rock mechanics
  • tunnelling
  • geological and geotechnical engineering
  • fracture/damage mechanics
  • mining
  • mechanical properties
  • observing methods (such as DIC, CT, etc.)
  • geohazards
  • stress and deformation
  • constitutive relations
  • engineering applications
  • rock-breaking methods
  • cracking process
  • numerical simulation
  • artificial intelligence

Participating Journals

Journal Name Impact Factor CiteScore Launched Year First Decision (median) APC
Energies
energies
3.2 5.5 2008 16.1 Days CHF 2600 Submit
Geosciences
geosciences
2.7 5.2 2011 23.6 Days CHF 1800 Submit
Minerals
minerals
2.5 3.9 2011 18.7 Days CHF 2400 Submit

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Published Papers (3 papers)

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17 pages, 9925 KiB  
Article
Evaluation Model of Hard Limestone Reformation and Strength Weakening Based on Acidic Effect
by Mingxiao Hou, Bingxiang Huang, Xinglong Zhao, Xuejie Jiao, Xufei Jiang and Zheng Sun
Minerals 2023, 13(8), 1101; https://doi.org/10.3390/min13081101 - 18 Aug 2023
Viewed by 732
Abstract
The typical thick-hard limestone roof with high failure pressure and easy fracture closure under in situ stress is extremely prone to induce disasters, which seriously threatens the safe production of coal mines. The modification of carbonate minerals by acidic effects can effectively realize [...] Read more.
The typical thick-hard limestone roof with high failure pressure and easy fracture closure under in situ stress is extremely prone to induce disasters, which seriously threatens the safe production of coal mines. The modification of carbonate minerals by acidic effects can effectively realize the weakening control of hard limestone strata. In this study, a multi-factor orthogonal experiment was designed for limestone acidification reactions, and the evaluation model for the reformation and strength weakening of hard limestone based on the acidic effect was established accordingly. The results showed that there is an order in the influence of various factors on the reaction parameters and strength indices of acidified limestone, and the improvement of rock properties by the level difference of acid concentration is significantly better than that of acid type and acidification time. Through numerical analysis, the evaluation model of limestone reformation and strength weakening considering the acid reaction parameters is given. The reliability of the model passed the credibility test and experimental verification, which can effectively reflect the strength response characteristics of acidified limestone. The simulated annealing (SA) algorithm is introduced to derive the optimal acidification system suitable for limestone weakening. Combined with the model, the control mechanism of the acidic effect on hard limestone strata was analyzed. The acidic effect can not only induce the rapid generation and expansion of micro-cracks at mineral-containing crystal defects, but also make the cracks remain relatively open under in situ stress due to the differential interaction on mineral components, which is conducive to the bearing capacity reduction and structural damage of limestone rock mass. The research results provide theoretical guidance for the acidification control of hard limestone strata in underground mines. Full article
(This article belongs to the Topic Failure Characteristics of Deep Rocks, Volume II)
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17 pages, 4656 KiB  
Article
A Quantitative Method to Predict the Shear Yield Stress of Rock Joints
by Zhenyu Han, Shijie Xie, Hang Lin, Hongyu Duan and Diyuan Li
Minerals 2023, 13(4), 500; https://doi.org/10.3390/min13040500 - 31 Mar 2023
Viewed by 1336
Abstract
The shear mechanical properties of rock joints are crucial in assessing the stability and safety of rock structures, including slopes, rock dams, and tunnels. The yield stress serves as a pivotal point that distinguishes the linear and non-linear mechanical characteristics of rock joints. [...] Read more.
The shear mechanical properties of rock joints are crucial in assessing the stability and safety of rock structures, including slopes, rock dams, and tunnels. The yield stress serves as a pivotal point that distinguishes the linear and non-linear mechanical characteristics of rock joints. Due to its significance in risk monitoring and safety evaluation, this paper first provides an overview of the commonly employed methods for identifying the yield stress. Then, a novel displacement reduction method based on the displacement reduction coefficient is proposed and systemically examined. The comparison between the proposed method and existing methods based on shear experimental data suggests that the former is more adept at accurately determining the yield stress without subjective interference. Finally, this innovative method is employed to estimate the effects of external environmental factors on the yield stress of rock joints. Full article
(This article belongs to the Topic Failure Characteristics of Deep Rocks, Volume II)
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18 pages, 13026 KiB  
Article
Study on Stability Control Mechanism of Deep Soft Rock Roadway and Active Support Technology of Bolt-Grouting Flexible Bolt
by Hao Zhang, Yingming Li, Xiangjun Wang, Shoudong Yu and Yi Wang
Minerals 2023, 13(3), 409; https://doi.org/10.3390/min13030409 - 15 Mar 2023
Cited by 3 | Viewed by 1104
Abstract
In order to study the stability control mechanism of deep soft rock roadway and the active support technology of the anchor-grouting flexible bolt, this paper takes the west wing transportation roadway of Yuandian No. 2 Coal Mine of Huaibei Mining Co., Ltd., Huaibei, [...] Read more.
In order to study the stability control mechanism of deep soft rock roadway and the active support technology of the anchor-grouting flexible bolt, this paper takes the west wing transportation roadway of Yuandian No. 2 Coal Mine of Huaibei Mining Co., Ltd., Huaibei, China as the research background. By analyzing the occurrence conditions and failure characteristics of the surrounding rock of the west wing transportation roadway and the structural characteristics and mechanical properties of the anchor-grouting flexible bolt, combined with the elastic–plastic and superimposed arch theory analysis, the superposition community theoretical model and the superposition joint support scheme of “bolt (cable) + anchor net + anchor-grouting flexible bolt + shotcrete support” are proposed. The reliability of the combined support scheme is analyzed by FLAC 3D numerical simulation software and field experiment. The results show that the maximum roof-to-floor convergence and two-side convergence of the west wing transportation roadway are only 30.7 mm and 27.1 mm after adopting the combined support scheme, and the deep displacement variation is within 7 mm, which can effectively maintain the stability of the roadway. The combined support scheme has a certain reference value for other similar roadways. Full article
(This article belongs to the Topic Failure Characteristics of Deep Rocks, Volume II)
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