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Application of Rock Mechanics in Mining Engineering to Sustainable Energy
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Application of Rock Mechanics in Mining Engineering to Sustainable Energy

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H: Geo-Energy".

Deadline for manuscript submissions: 24 August 2024 | Viewed by 1249

Special Issue Editors

Dr. Xinglong Zhao

E-Mail Website
Guest Editor
State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining & Technology, Xuzhou, China
Interests: rock mechanics; hydraulic fracturing; stress disturbance; fracture propagation
Special Issues, Collections and Topics in MDPI journals
Dr. Lei Sun

E-Mail Website
Guest Editor
Department of Civil Engineering, University of Toronto, Toronto, ON, Canada
Interests: THM coupling; slope stability; green mining; numerical simulation
Dr. Xin Zhang

E-Mail Website
Guest Editor
School of Minerals and Energy Resources Engineering, UNSW Sydney, Sydney, Australia
Interests: hydraulic fracturing; induced seismicity; rock precondition

Special Issue Information

Dear Colleagues,

On behalf of Energies, we would like to invite you to contribute to this Special Issue related to the “Application of Rock Mechanics in Mining Engineering to Sustainable Energy”. Rock mechanics is a fundamental subject in mining engineering. Over the last few decades, huge successes have been achieved in theory and engineering applications related to mining engineering for sustainable energy. At the same time, as the mining depth of coal resources has increased, the rock mechanics problems faced by deep mining have become more serious, such as the efficient mechanical excavation of deep hard rock, the prevention and control of thermal disasters, stress transfer around roadways with a high ground pressure, intelligent monitoring and the early warning of rock fracture, and intelligent mining technology.

This Special Issue aims to collect submissions on recent advances in rock mechanics and intelligent mining in deep coal mining engineering for sustainable energy. We expect to bring together researchers in the aforementioned fields to highlight the current development of new techniques, to exchange the latest information on the underlying mechanisms, to present advanced algorithms for modeling, and to facilitate collaboration between researchers in different fields. We invite you to submit comprehensive review papers and original articles.

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

  • Numerical simulation of coupled thermo-hydraulic-mechanical damage and rock fractures in deep mining;
  • Intelligent monitoring and early warning of rock fractures;
  • Intelligent mining technology;
  • Novel laboratory testing approaches in rock mechanics;
  • New theories or methods of the mechanical breaking of hard rock;
  • Stress transfer methods around roadways with a high ground pressure;
  • Deformation and damage characteristics of rock roadways in deep mining.

Dr. Xinglong Zhao
Dr. Lei Sun
Dr. Xin Zhang
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 100 words) can be sent to the Editorial Office for announcement on this website.

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. Energies 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 2600 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 mining for sustainable energy
  • rock breaking
  • stress transfer
  • strata control

Published Papers (2 papers)

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Research

17 pages, 10190 KiB  
Article
Numerical Study on the Characteristics and Control Method of Coal Leakage between Supports in Integrated Mining of Extremely Loose and Soft Coal Seams
by Peiju Yang, Shurong Zhang and Xufeng Wang
Energies 2024, 17(5), 1013; https://doi.org/10.3390/en17051013 - 21 Feb 2024
Cited by 1 | Viewed by 380
Abstract
Extremely loose and soft coal seams, with a Platts coefficient of less than 0.3, are easy to break in the process of integrated mechanized roof coal mining and are prone to spilling and piling up between the hydraulic supports, which is a safety [...] Read more.
Extremely loose and soft coal seams, with a Platts coefficient of less than 0.3, are easy to break in the process of integrated mechanized roof coal mining and are prone to spilling and piling up between the hydraulic supports, which is a safety hazard for the movement of equipment. The coal particles must be cleaned up manually, resulting in reduced resource recovery rates and lower mining face efficiency. To effectively mitigate and control the problem of coal spillage accumulation amidst hydraulic supports, this study utilizes discrete element numerical simulation to examine the characteristics of block size distribution and the spilling process during the crushing of highly loose and soft top coal. By taking into account various parameters associated with shelf spacing, this research identifies key factors for controlling arching and self-stopping phenomena in top coal particles. The study findings suggest that the uppermost coal layer undergoes significant fragmentation during the integrated mining process of loosely packed and soft coal seams, resulting in a higher probability of coal leakage issues observed near the rack’s coal wall side and at the end of the roof control area. The key factors contributing to the self-arresting of spilled coal particles include inherent characteristics of the coal body, particle diameter, and stand spacing. In this specific mine under investigation, an arch formation naturally occurs to prevent further leakage when the distance between stands is less than eight times the diameter of particles, and after process correction, the average time saving for a single shift of manual floating coal cleaning at the working face is about 2 h, and the proportion of time saving is more than 50~75%. Full article
(This article belongs to the Special Issue Application of Rock Mechanics in Mining Engineering to Sustainable Energy)
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16 pages, 4423 KiB  
Article
Study on Numerical Simulation of Gas–Water Two-Phase Micro-Seepage Considering Fluid–Solid Coupling in the Cleats of Coal Rocks
by Cheng Qian, Yaxi Xie, Xiujun Zhang, Ruiqi Zhou and Bixin Mou
Energies 2024, 17(4), 928; https://doi.org/10.3390/en17040928 - 16 Feb 2024
Viewed by 421
Abstract
The increasing demand for natural gas energy will promote unconventional natural gas, such as coal seam gas and shale gas, to play a key role in future energy development. The mechanical properties of coal seams are weaker compared with conventional natural gas reservoirs. [...] Read more.
The increasing demand for natural gas energy will promote unconventional natural gas, such as coal seam gas and shale gas, to play a key role in future energy development. The mechanical properties of coal seams are weaker compared with conventional natural gas reservoirs. The fluid–solid coupling phenomenon exists widely at the pore scale and macro scale of coal seams, and runs through the whole process of coalbed gas exploitation. The objective of this study is to establish a microscale gas–water flow model for coalbed methane considering fluid structure coupling. Frist, this study used scanning electron microscopy (SEM) to obtain microscopic pore images of coal rocks. Then, we constructed a numerical model to simulate the movement of coalbed methane and water within the scale of coal cleats based on the Navier–Stokes equation, phase field method, and solid mechanics theory. Finally, we analyzed the effects of injection pressure and wettability on the microscopic two-phase seepage characteristics and displacement efficiency of coal. Our research shows that when the injection pressure is increased from 60 kPa to 120 kPa, the displacement completion time is shortened from 1.3 × 10−4 s to 7 × 10−5 s, and the time is doubled, resulting in a final gas saturation of 98%. The contact angle increases from 45° to 120°, and the final gas saturation increases from 0.871 to 0.992, an increase of 12.2%. Full article
(This article belongs to the Special Issue Application of Rock Mechanics in Mining Engineering to Sustainable Energy)
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