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Symmetry
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Symmetry and Asymmetry in Rockburst Prevention and Control for Deep...
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Symmetry and Asymmetry in Rockburst Prevention and Control for Deep Mining Engineering

A Special Issue of Symmetry (ISSN 2073-8994) belonging to the section "F: Engineering and Materials".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 895

Editor

Dr. Chengchun Xue

E-Mail Website
Guest Editor
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: rock burst; coal burst

Special Issue Information

Dear Colleagues,

As China’s coal production focus shifts to greater depths, the severity of rockburst disasters continues to escalate. As a typical dynamic disaster in coal mining, a rockburst results from the combined effects of multiple factors, including the internal structure and physical properties of coal-rock masses, anomalous geological structures, and external dynamic disturbances. In particular, the asymmetric evolution of coal-rock layer thickness distribution and the asymmetric layout of excavation spaces make the disaster process even more complex. Consequently, rockburst prevention and control still face many challenges, such as unclear disaster mechanisms, difficulties in accurate early warning, and challenges in targeted prevention, which severely constrain the safe and efficient development of deep coal resources in China.

To promote academic exchange in the field of rockburst and to drive innovation in theoretical research and technical applications, the journal Symmetry plans to publish a Special Issue entitled “Symmetry and Asymmetry in Rockburst Prevention and Control for Deep Mining Engineering”. This Special Issue welcomes research papers and review articles on innovative theories and new technologies in the field of rockburst.

Dr. Chengchun Xue
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rock burst
  • coal burst
  • mine tremors
  • microseismic monitoring
  • coal-rock dynamic disasters
  • engineering case studies
  • intelligent early warning

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Published Papers (2 papers)

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Research

18 pages, 14164 KB  
Article
Compaction Deformation and Acoustic Emission Characteristics of Crushed Gangue with Different Lithologies in Goafs Under Wetting Conditions
by Guan Wang, Jiannan Liu, Zhiqiang Zhao, Yuanwei Cao, Ya Zhao, Zhengbing Qi, Jianye Yang, Yingyuan Wen and Wenhao Guo
Symmetry 2026, 18(9), 1458; https://doi.org/10.3390/sym18091458 - 30 Aug 2026
Viewed by 216
Abstract
The compaction deformation and load-bearing behavior of crushed gangue in the caved zone of goafs directly affect overburden movement, fracture evolution, and stability evolution. To clarify the compaction deformation mechanism of crushed gangue under wetting conditions in goafs, confined compression tests coupled with [...] Read more.
The compaction deformation and load-bearing behavior of crushed gangue in the caved zone of goafs directly affect overburden movement, fracture evolution, and stability evolution. To clarify the compaction deformation mechanism of crushed gangue under wetting conditions in goafs, confined compression tests coupled with synchronous acoustic emission (AE) monitoring were carried out. Sandstone and mudstone crushed gangue were selected as the research objects, and Talbot gradation indexes of n = 0.2, 0.4, 0.6, and 0.8 were adopted. The effects of lithology, particle gradation, and moisture condition on compaction deformation, particle-structure adjustment, and AE response were systematically analyzed under dry and short-term wetting conditions. The results show that: (1) the confined compression process of crushed gangue exhibits pronounced nonlinear strain-hardening behavior and can be divided into rapid compaction, slow compaction, and stable compaction stages. Water dripping shifts the stress–strain curves toward the higher-strain side and significantly enhances the compression deformation of mudstone, indicating a stronger wetting response of mudstone than sandstone. Meanwhile, water dripping reduces the equivalent compressive stiffness of crushed gangue. (2) Particle gradation affects the compaction response by modifying the proportions of coarse and fine particles and the initial pore structure. With increasing Talbot gradation index n, the proportion of coarse particles increases, resulting in more pronounced skeleton collapse, localized particle breakage, and secondary filling by fine particles, and the final compression deformation generally increases. After wetting, the final strain of mudstone samples with different gradations concentrates within 0.32035–0.33439, indicating that the control of water-induced softening on mudstone compaction deformation is stronger than the gradation effect. (3) AE results indicate that the compaction process of broken rock can be divided into a flow sliding deformation stage, a fracture deformation filling stage, and a compaction elastic deformation stage, corresponding, respectively, to particle sliding and rearrangement, particle breakage and pore filling, and structural stabilization and consolidation. Water action affects damage evolution by modifying particle contact conditions, promoting fine-particle migration, and facilitating structural adjustment. Among them, mudstone exhibits a more pronounced wetting response, whereas sandstone maintains relatively higher structural stability. The findings provide a reference for analyzing overburden movement, predicting residual subsidence, and evaluating stability in water-influenced goafs. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Rockburst Prevention and Control for Deep Mining Engineering)
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26 pages, 9701 KB  
Article
Analysis of Stress Evolution Characteristics and Mine Pressure Patterns During Roadway Excavation Under Irregular Goaf Areas
by Haonan Liu, Yingyuan Wen, Chaorui Jiang, Jiannan Liu, Wenhao Guo, Anye Cao, Yang Shi, Lixin Fan and Lizhen Xu
Symmetry 2026, 18(9), 1414; https://doi.org/10.3390/sym18091414 - 22 Aug 2026
Viewed by 265
Abstract
To clarify the stage-dependent stress superposition in gob-side roadways beneath irregular overlying goafs, the #52109 material roadway was investigated using a MATLAB-based analytical stress-transfer model, key-strata mechanics, FLAC3D simulation, and field monitoring. The analytical results revealed an approximately elliptical “stress-bubble” distribution with a [...] Read more.
To clarify the stage-dependent stress superposition in gob-side roadways beneath irregular overlying goafs, the #52109 material roadway was investigated using a MATLAB-based analytical stress-transfer model, key-strata mechanics, FLAC3D simulation, and field monitoring. The analytical results revealed an approximately elliptical “stress-bubble” distribution with a maximum increment of 4.82 MPa beneath the overlying remnant coal bodies and a second roof-induced stress peak of 1.22 MPa at 14.88 m from the adjacent goaf boundary, governed mainly by Sub-key Strata 2 and 3. At the actual vertical separation of 71.5 m between the roof of the #52109 material roadway and the base of the overlying goaf, the two stress-component curves calculated in MATLAB intersected at 59.1 m from the projected boundary of the overlying remnant coal body, defining a site-specific transition between the dominant stress sources. Beyond 59.1 m, the lateral abutment stress induced by the #52107 goaf was dominant; within this distance, the downward-transmitted stress from the remnant coal body increased rapidly and was superimposed on the lateral abutment stress. The analytical and FLAC3D models predicted maximum total vertical stresses of 32.19 and 32.51 MPa, respectively, with a difference of 0.32 MPa (0.99%); the numerical model also qualitatively reproduced the corresponding spatial transition in the stress pattern. The combined results identified the sections 250–485 m and 680–1305 m from the roadway entrance as high-hazard zones. After targeted large-diameter borehole destressing and roof pre-splitting blasting were implemented, field monitoring recorded a maximum side deformation of 77.9 mm, while low-energy seismic events accounted for 94.33% of all monitored events. These findings provide a quantitative basis for hazard zoning and regional pressure relief in gob-side roadways beneath irregular overlying goafs. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Rockburst Prevention and Control for Deep Mining Engineering)
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