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Advances in the Principles and Technologies for the Physical and Mechanical Behaviors of Deep Rock

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

Deadline for manuscript submissions: 20 October 2026 | Viewed by 1611

Special Issue Editors

Dr. Cong Li

E-Mail Website
Guest Editor
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, China
Interests: rock mechanics
Dr. Zhiqiang He

E-Mail Website
Guest Editor
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, China
Interests: deep rock insulation coring; rock mechanics
Dr. Jianxing Liao

E-Mail Website
Guest Editor
College of Civil Engineering, Guizhou University, Guiyang, China
Interests: flow through rock fractures

Special Issue Information

Dear Colleagues,

With the continuous advancement of earth exploration, there is an ever-growing demand for operations in extreme and challenging environments. These geological conditions-such as high geo-pressure, elevated temperatures, and intense in situ stress-present significant challenges to resource extraction efficiency, engineering safety, and frontier scientific discovery.

The emerging principles and technologies hold transformative potential to address these challenges. By leveraging computer-aided engineering, data-driven modeling, and artificial intelligence, we may have the opportunity to enhance both the efficiency and safety of engineering operations in deep environments. Beyond improving industrial performance, these innovations could also contribute to sustainable development goals and open new frontiers in earth sciences and resource engineering.

This Special Issue aims to collect high-quality contributions that showcase the latest advances and practical applications. While we particularly encourage submissions focusing on deep earth engineering, resource exploration, and intelligent mine systems, we also welcome interdisciplinary research that explores the integration of intelligent technologies with engineering practices under complex deep geological conditions. It is expected that this Special Issue will serve as a platform for sharing novel theories, pioneering methods, and engineering breakthroughs—ultimately strengthening our ability to explore, utilize, and manage deep geological resources more effectively.

Topics of interest include (but are not limited to) the following:

  • Principles and technologies of deep in situ conditions preserved coring and Testing;
  • Mechanical behaviors of deep rock mass;
  • Intelligent design, simulation, and operational management for deep rock engineering;
  • Data-driven modeling and AI-based prediction of deep rock physical–mechanical behaviors;
  • Advanced theories and technologies for deep coal resources mining.

We eagerly anticipate receiving your submissions and fostering impactful academic exchanges through this Special Issue.

Sincerely,

Dr. Cong Li
Dr. Zhiqiang He
Dr. Jianxing Liao
Guest Editors

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-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • intelligent mine systems
  • deep coal mining
  • deep rock
  • deep earth engineering
  • rock mass
 

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Published Papers (2 papers)

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Research

20 pages, 6675 KB  
Article
Study on the Stability of Mining Walls During the Recovery of Flank Pillars Adjacent to Massive Backfill
by Zeyang Guo, Chang Liu, Hai Wu, Feng Wei, Fei Li and Lei Wen
Appl. Sci. 2026, 16(9), 4227; https://doi.org/10.3390/app16094227 - 26 Apr 2026
Viewed by 265
Abstract
To address the difficulty of determining the safe reserved thickness of the mining wall in the test block of the panel pillar at Tongkeng Mine, The stress of mining wall is comprehensively analyzed. Combined with numerical simulation method and field monitoring, the optimal [...] Read more.
To address the difficulty of determining the safe reserved thickness of the mining wall in the test block of the panel pillar at Tongkeng Mine, The stress of mining wall is comprehensively analyzed. Combined with numerical simulation method and field monitoring, the optimal wall thickness is determined. By differentiating each stress component, the mathematical equations governing the locations where extreme values of the stress components occur are derived, and the mathematical expressions for the extreme value positions of each stress component are further determined accordingly. Considering the geological characteristics and mining conditions of the experimental stope with panel pillars, the eastern mining wall of the test block is selected as the research object. A mining wall thickness range of 3 m to 8 m is designed, and the optimal safe reserved thickness of the mining wall is determined through numerical simulation. Based on the optimal mining wall retention thickness, stopping operations are carried out on the orebody of the experimental stope. Meanwhile, monitoring points are reasonably arranged from the upper-middle section to the middle of the mining wall, and real-time monitoring is performed on the stress variation data at each monitoring point during the entire stopping process of the test block. Theoretical analysis results show that the exact locations of the extreme values of each stress component can be accurately determined within the two-dimensional plane of the mining wall, among which the extreme value of the horizontal stress component appears at the midpoint of the mining wall thickness. Numerical simulation results indicate that both the stress and displacement of the mining wall exhibit a gradual decreasing trend with an increase in mining wall thickness. However, when the mining wall thickness exceeds 5 m, the reduction rate of stress and displacement slows down significantly, and the mining wall tends to become stable. Maintaining a mining wall thickness of 5 m in the experimental stope can generally ensure the safe recovery of the orebody. However, pronounced stress concentrations occur at the geometric corners of the mining wall, which result from stress retention caused by changes in the mining wall geometry. Meanwhile, the stress concentration in the mining wall is synchronized with that in the drilling galleries of the experimental stope, and varying degrees of failure occur in the drilling galleries at locations where stress concentration appears in the mining wall. Monitoring results show that the maximum stress borne by the drilling gallery is approximately 26 MPa, beyond which rock mass collapse and fragmentation are prone to occur. Full article
(This article belongs to the Special Issue Advances in the Principles and Technologies for the Physical and Mechanical Behaviors of Deep Rock)
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22 pages, 34615 KB  
Article
Development and Experimental Validation of Active In Situ Temperature-Preserved Coring Testing System for Deep Oil and Gas Reservoirs
by Haishu Bai, Zhiqiang He, Zijie Wei and Yufan Lan
Appl. Sci. 2025, 15(22), 12011; https://doi.org/10.3390/app152212011 - 12 Nov 2025
Viewed by 759
Abstract
Deep oil and gas reservoirs exist under high-temperature and high-pressure (HTHP) conditions. Conventional coring without thermal preservation during retrieval induces thermal imbalance, biasing petrophysical and phase measurements and distorting resource evaluation. Internationally, most temperature-preserved corers are designed for low-temperature conditions and rely on [...] Read more.
Deep oil and gas reservoirs exist under high-temperature and high-pressure (HTHP) conditions. Conventional coring without thermal preservation during retrieval induces thermal imbalance, biasing petrophysical and phase measurements and distorting resource evaluation. Internationally, most temperature-preserved corers are designed for low-temperature conditions and rely on passive insulation, whereas existing HTHP simulators can reproduce pressure and temperature but lack the capability to evaluate active thermal retention throughout coring and retrieval. Here, we develop and validate a full-scale testing platform for active in situ temperature-preserved coring (active ITP-coring), consisting of a simulated HTHP core chamber, a through-chamber conductive module, a high-pressure simulation module, an ambient-temperature simulation module, and a data acquisition and control module. The system operates stably at 150 °C and 140 MPa, reproduces realistic ambient cooling histories (with maximum and average rates of 11.22 and 5.11 °C/min), and demonstrates that, under HTHP conditions, active preservation limits the internal temperature drop to 4.2 °C over 40.5 min (temperature retention of 98.93%), markedly outperforming the 13.1 °C decrease within 14.9 min without active preservation. These results verify the system’s reliability and, at the laboratory scale, demonstrate the feasibility of active ITP-coring, providing a reproducible methodology and quantitative evidence for engineering deployment in deep reservoirs. Full article
(This article belongs to the Special Issue Advances in the Principles and Technologies for the Physical and Mechanical Behaviors of Deep Rock)
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