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Stability Control of Underground Openings Under High Stress and Deep Mining Environment: 2nd Edition

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (31 May 2025) | Viewed by 469

Special Issue Editors


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Guest Editor
School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Interests: ground control; mining engineering; rock reinforcement
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: ground control; rock mechanics; backfill mining
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the rapid development of mining engineering, coal and hard rock resources reserved in relatively simple geological environments are likely to be exhausted. Therefore, to satisfy the demand for mineral resources, more attention needs to be paid to the coal and hard rock resources under complex conditions. It is well known that, under complex conditions, mining activities are subjected to many challenges. For example, under complex conditions, mining operators, equipment, and techniques are influenced by a combination of factors, including high stress, geological discontinuities, stress conditions, and high ground temperature.

In order to guarantee that mining activities can be safely conducted, a better understanding of the mechanical behavior of underground openings under complex conditions is necessary. Moreover, it is important to propose new ground control methods under complex conditions. This Special Issue welcomes high-quality academic papers concerned with stability control techniques and methods for underground openings under high stress and deep mining. Additionally, new ground control techniques, materials, and methods are encouraged.

Potential topics include, but are not limited to, the following:

  1. Cyclic loading and unloading tests on coal and rock samples;
  2. Dynamic loading tests on coal and rock materials;
  3. Mechanical tests on coal and rock materials under high-temperature conditions;
  4. Analytical modeling of the mechanical behavior of coal and rock materials;
  5. Numerical simulation of the performance of coal and rock materials;
  6. In situ campaigns of new ground control methods;
  7. In situ observations of the failure processes in underground openings.

Dr. Jianhang Chen
Prof. Dr. Qingliang Chang
Guest Editors

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Keywords

  • stability control
  • underground openings
  • stress concentration
  • dynamic loading

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Published Papers (1 paper)

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Research

17 pages, 7633 KB  
Article
Mechanical Behavior Characteristics of Sandstone and Constitutive Models of Energy Damage Under Different Strain Rates
by Wuyan Xu and Cun Zhang
Appl. Sci. 2025, 15(14), 7954; https://doi.org/10.3390/app15147954 - 17 Jul 2025
Viewed by 276
Abstract
To explore the influence of mine roof on the damage and failure of sandstone surrounding rock under different pressure rates, mechanical experiments with different strain rates were carried out on sandstone rock samples. The strength, deformation, failure, energy and damage characteristics of rock [...] Read more.
To explore the influence of mine roof on the damage and failure of sandstone surrounding rock under different pressure rates, mechanical experiments with different strain rates were carried out on sandstone rock samples. The strength, deformation, failure, energy and damage characteristics of rock samples with different strain rates were also discussed. The research results show that with the increases in the strain rate, peak stress, and elastic modulus show a monotonically increasing trend, while the peak strain decreases in the reverse direction. At a low strain rate, the proportion of the mass fraction of complete rock blocks in the rock sample is relatively high, and the shape integrity is good, while rock samples with a high strain rate retain more small-sized fragmented rock blocks. This indicates that under high-rate loading, the bifurcation phenomenon of secondary cracks is obvious. The rock samples undergo a failure form dominated by small-sized fragments, with severe damage to the rock samples and significant fractal characteristics of the fragments. At the initial stage of loading, the primary fractures close, and the rock samples mainly dissipate energy in the forms of frictional slip and mineral fragmentation. In the middle stage of loading, the residual fractures are compacted, and the dissipative strain energy keeps increasing continuously. In the later stage of loading, secondary cracks accelerate their expansion, and elastic strain energy is released sharply, eventually leading to brittle failure of the rock sample. Under a low strain rate, secondary cracks slowly expand along the clay–quartz interface and cause intergranular failure of the rock sample. However, a high strain rate inhibits the stress relaxation of the clay, forces the energy to transfer to the quartz crystal, promotes the penetration of secondary cracks through the quartz crystal, and triggers transgranular failure. A constitutive model based on energy damage was further constructed, which can accurately characterize the nonlinear hardening characteristics and strength-deformation laws of rock samples with different strain rates. The evolution process of its energy damage can be divided into the unchanged stage, the slow growth stage, and the accelerated growth stage. The characteristics of this stage reveal the sudden change mechanism from the dissipation of elastic strain energy of rock samples to the unstable propagation of secondary cracks, clarify the cumulative influence of strain rate on damage, and provide a theoretical basis for the dynamic assessment of surrounding rock damage and disaster early warning when the mine roof comes under pressure. Full article
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