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New Insights: Deep Exploitation of Coal-Based Energies
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New Insights: Deep Exploitation of Coal-Based Energies

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H3: Fossil".

Deadline for manuscript submissions: closed (1 May 2023) | Viewed by 4786

Special Issue Editors

Dr. Zhaohui Wang

E-Mail Website
Guest Editor
School of Energy and Mining Engineering China University of Mining and Technology, Beijing D11 Xueyuan Road, Beijing 100083, China
Interests: coal; rock mechanics; mining method; ground control; rock simulation
Special Issues, Collections and Topics in MDPI journals
Dr. Shengli Yang

E-Mail Website
Guest Editor
School of Energy and Mining Engineering China University of Mining and Technology, Beijing D11 Xueyuan Road, Beijing 100083, China
Interests: intelligent mining; disaster prevention; roof control; mining method
Dr. Gaofeng Song

E-Mail Website
Guest Editor
College of Civil Engineering, North China University of Technology, Beijing 100144, China
Interests: numerical modeling; energy minerals; rock excavation; disaster prediction
Dr. Dezhong Kong

E-Mail Website
Guest Editor
College of Mining, Guizhou University, Guiyang 550025, China
Interests: Rock Stability; Longwall Mining; Geomechanics; Rock Characterization

Special Issue Information

Dear Colleagues,

Up to now, the reserves of shallow-buried energies decrease at an amazing speed. The exploitation of deep-buried energies becomes imperative, among which coal-based energies account for a large proportion. It is widely known that coal-based energies play an important role in the social development of human beings. In order to strengthen the capacity in exploiting deep coal-based energies, scientific research groups majoring in coal-related directions from worldwide have conducted many works on the problems encountered in deep exploitation of coal-based energies, such as exploitation method, mineral identification, rock mass properties, engineering responses of rock masses, instability modes of surrounding rocks, collaborative exploitation technologies for associated resources, disaster and its prevention methods, etc. However, it seems difficult to completely remove the problems from the deep exploitation of coal-based energies with conventional theories and technologies. Thus, on behalf of Energies, we invite you to contribute an original research article to a Special Issue on new insights into the deep exploitation of coal-based energies.

This Special Issue aims to showcase the latest scientific and technological achievements in the deep exploitation of coal-based energies for accelerating research communication and technical development.

Potential topics include, but are not limited to:

  1. Current situation of the exploitation of deep coal-based energies
  2. Fundamental development in deep rock mechanics,
  3. Identification and characterization of the components included in coal-based energies
  4. Scientific and sustainable exploitation method for deep coal-based energies
  5. Intelligent equipment applicable to deep exploitation of coal-based energies
  6. Common disasters existing in the deep exploitation of coal-based energies
  7. New disaster prevention method in deep exploitation of coal-based energies
  8. Multiscale investigation on failure mechanisms of the rocks at large depth
  9. Mechanical characterization and numerical simulation of failure process of deep rocks
  10. Rock stability improvement method for safe exploitation of coal-based energies

Dr. Zhaohui Wang
Dr. Shengli Yang
Dr. Gaofeng Song
Dr. Dezhong Kong
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

  • exploitation method
  • exploitation method
  • intelligent equipment
  • resource component
  • rock mechanics
  • mechanical properties
  • rock characterization
  • rock stability
  • failure mechanism
  • mining disasters
  • disaster prevention
  • numerical simulation

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Published Papers (3 papers)

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Research

21 pages, 6004 KiB  
Article
Research Development and Critical Problems Existing in Strata Movement and Its Control
by Yuesong Tang, Zhaohui Wang, Wenchao Sun, Wei Wang and Haixiao Yang
Energies 2023, 16(16), 6065; https://doi.org/10.3390/en16166065 - 18 Aug 2023
Cited by 2 | Viewed by 1420
Abstract
Under the guidance of green mining and scientific mining ideas, strata movement and its control have achieved a series of research developments in China. Based on the summary of research achievements related to strata movement characteristics, the influences on mining activity and surface [...] Read more.
Under the guidance of green mining and scientific mining ideas, strata movement and its control have achieved a series of research developments in China. Based on the summary of research achievements related to strata movement characteristics, the influences on mining activity and surface environment, and the utilizing and controlling methods, critical problems that need to be solved are identified for a study on strata movement and its control. Mining activities will cause the redistribution of mining stress. The overlying strata incurs deformation, breaking, and movement under this mining stress. During this period, energy accumulation and release will occur in the roof strata, and the initiation and expansion of overburden fractures will occur. This demonstrates the impact of mining activities on underground safety and the ground environment. Thus, strata movement characteristics in longwall faces should be emphasized in the future. At present, the rock movement is still in the stage of qualitative description. Monitoring the movement of overlying strata in the stope and making predictions according to the monitoring results play a great role in ensuring the safety of mining production. Furthermore, system stiffness theory and intelligent control techniques for overburden strata should be developed. Full article
(This article belongs to the Special Issue New Insights: Deep Exploitation of Coal-Based Energies)
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17 pages, 9702 KiB  
Article
The Anti-Impact Characteristics of Cables under Impact Load
by Xiaoyong Lian, Jun Li, Housheng Jia and Peng Ding
Energies 2023, 16(2), 633; https://doi.org/10.3390/en16020633 - 5 Jan 2023
Viewed by 1130
Abstract
The cable plays a vital role in roadway support. As the last barrier to prevent roof collapse and impact disaster accidents, it is of great significance to study stress characteristics of cables under impact dynamic load to guide the rock burst roadway support. [...] Read more.
The cable plays a vital role in roadway support. As the last barrier to prevent roof collapse and impact disaster accidents, it is of great significance to study stress characteristics of cables under impact dynamic load to guide the rock burst roadway support. With high-strength cables of Φ21.6 and Φ21.8 mm and low-resistance high-extension cables of Φ21.5 mm as examples, this paper studied the instantaneous mechanical state and energy dissipation characteristics of different types of cables under impact loads by using impact testing machines and high-frequency data acquisition system. The results show that the impact process can strengthen the strength of the cable. The strength and elongation of anchor cables are a pair of characteristic indexes with an inverse relationship. Simply increasing one index cannot improve the overall impact resistance of the cable. To quantitatively characterize the impact resistance and energy absorption effect of cables, the impact resistance index k was introduced. The smaller the index, the better the energy absorption effect of cables. In the process of dynamic load impact of high-strength cable, about 43.7% of the total energy is dissipated disordered in the form of mechanical energy. The dynamic load impact process of low-resistance and high-extension cables is similar to the viscoelastic impact. In the collision compaction stage, the force of the cable is basically constant. Most of the impact energy is absorbed or transformed by the cable, about 17.7% of which is mostly dissipated in the form of mechanical energy. The disordered dissipated mechanical energy is less, so the impact resistance and energy absorption effect of this cable are better. The cable plays an important role in the process of bearing the dynamic load of surrounding rock. The anti-impact performance index of cables should be considered in dynamic load impact roadway support design. Full article
(This article belongs to the Special Issue New Insights: Deep Exploitation of Coal-Based Energies)
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20 pages, 8495 KiB  
Article
Computed Tomography Observation and Image-Based Simulation of Fracture Propagation in Compressed Coal
by Zhaohui Wang, Wenchao Sun, Yanting Shui and Pengju Liu
Energies 2023, 16(1), 260; https://doi.org/10.3390/en16010260 - 26 Dec 2022
Cited by 1 | Viewed by 1159
Abstract
In this study, the fracture propagation characteristics and associated mechanisms of coal are investigated by using computed tomography (CT) observation and image-based simulation. The spatial distribution and the structural morphology of original fractures provide significant influences on the failure behavior of fractured coal. [...] Read more.
In this study, the fracture propagation characteristics and associated mechanisms of coal are investigated by using computed tomography (CT) observation and image-based simulation. The spatial distribution and the structural morphology of original fractures provide significant influences on the failure behavior of fractured coal. The fractures with small dip angles and large openings result in more-obvious fracture closure and stable propagation stages, while failure pattern is more sensitive to those with large dip angles. The coal tends to experience brittle failure, which transits from a splitting to mixed-splitting faulting mode because of the difference in original fracture distribution. The final failure fracture network originates mainly from the propagation of original fractures, driven by localized tensile stress. Fracture interaction and mineral influence tend to increase the complexity in the failure fracture network. Moreover, image-based numerical models are established on the basis of CT reconstruction, where the spatial distribution and the structural morphology of original fractures are properly considered. Numerical modeling reproduces similar stress–strain responses and failure fracture networks to that observed in the experiment. The predicted distribution of tensile stress shows a similar evolution trend to the failure fracture network, implying that the fracture propagation of coal is dominated by tensile failure. Shear cracks emerge mainly after the large fracture running through the coal sample has been formed. Full article
(This article belongs to the Special Issue New Insights: Deep Exploitation of Coal-Based Energies)
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