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Simultaneous Exploitation of Coal and Associated Energy

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

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 4236

Special Issue Editors


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Guest Editor
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: green mining; deep resources exploitation; intelligent mining; mine green functional materials; simultaneous exploitation of coal and geothermal energy; backfill mining

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Guest Editor
Department of Resources Engineering, School of Mines, China University of Mining and Technology, Xuzhou 221006, China
Interests: mining engineering; rock seepage mechanics; water inrush control; simultaneous exploitation of coal and geothermal energy; backfill mining
Special Issues, Collections and Topics in MDPI journals
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: energy exploitation; rock mechanics; artificial intelligence; SC-CO2 fracturing; environmental protection

Special Issue Information

Dear Colleagues,

We invite submissions to a Special Issue of the journal Energies on the topic of Simultaneous Exploitation of Coal and Associated Energy.

Safe, efficient, and green simultaneous exploitation of coal and associated energy has become a hot topic. A large number of associated energies are often enriched in coal-measure strata, including metallic and non-metallic mineral resources, geothermal resources, rare metals, unconventional oil and gas resources, and water resources. Traditional coal mines only exploit coal resources and other resources associated with coal measures are considered less or not considered, resulting in a lot of wasted resources. With the depletion of coal resources, it is important to achieve the best economic and social benefits from the traditional coal mining independent of the simultaneous exploitation of coal and associated energy. The simultaneous exploitation of coal and associated energy is faced with complex geological conditions, multi-parameter and multi-field coupling time and space effects in stope, and the comprehensive development and utilization of resources is inefficient and difficult. Exploring the scientific issues and key technologies of the simultaneous exploitation of coal and associated energy is of great significance to energy structure adjustment and ecological environment protection.

This Special Issue seeks contributions spanning a broad range of topics related but not limited to the following:

  • Theory and method of simultaneous exploitation of coal and associated energy;
  • Hazardous warning of simultaneous exploitation of coal and associated energy;
  • Perspective geological characterization of coal and associated energy;
  • Surrounding rock control technology for energy simultaneous exploitation;
  • Pollution element diffusion and environmental control technology;
  • Safe and efficient exploitation (mining) of geothermal energy;
  • Safe and efficient exploitation (mining) of coalbed methane;
  • Safe and efficient exploitation (mining) of unconventional oil and gas resources;
  • Simulation and experiments on multi-phase and multi-field coupling evolution mechanism;
  • Technical and economic evaluation of associated energy exploitation (mining).

Prof. Dr. Jixiong Zhang
Prof. Dr. Dan Ma
Dr. Hao Yan
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

  • Theory and method of simultaneous exploitation of coal and associated energy
  • Hazardous warning of simultaneous exploitation of coal and associated energy
  • Perspective geological characterization of coal and associated energy
  • Surrounding rock control technology for energy simultaneous exploitation
  • Pollution element diffusion and environmental control technology
  • Safe and efficient exploitation (mining) of geothermal energy
  • Safe and efficient exploitation (mining) of coalbed methane
  • Safe and efficient exploitation (mining) of unconventional oil and gas resources
  • Simulation and experiments on multi-phase and multi-field coupling evolution mechanism
  • Technical and economic evaluation of associated energy exploitation (mining)

Published Papers (2 papers)

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Research

14 pages, 3021 KiB  
Article
Mechanical Properties of Clay Based Cemented Paste Backfill for Coal Recovery from Deep Mines
by Qiangqiang Cheng, Yaben Guo, Chaowei Dong, Jianfei Xu, Wanan Lai and Bin Du
Energies 2021, 14(18), 5764; https://doi.org/10.3390/en14185764 - 13 Sep 2021
Cited by 9 | Viewed by 1619
Abstract
Fly ash cement is used to solidify marine clay to prepare marine-clay-based cemented paste backfill (MCCPB) to fill the underground goaf of mines, which not only utilizes solid waste such as fly ash and marine clay, but also controls surface subsidence and protects [...] Read more.
Fly ash cement is used to solidify marine clay to prepare marine-clay-based cemented paste backfill (MCCPB) to fill the underground goaf of mines, which not only utilizes solid waste such as fly ash and marine clay, but also controls surface subsidence and protects the environment. To simulate the complex underground mine water environment of the filling body, a dry-wet cycle aquatic environment test under different material ratios and curing ages was designed. The water absorption and unconfined compression strength (UCS) of MCCPB with curing ages of 7 and 28 days under the action of 0, 1, 3, and 7 dry-wet cycles were investigated. The results indicate as the number of dry-wet cycles increases, the surface of MCCPB becomes significantly rougher, and the water content and the solid mass decrease accordingly. Different ratios and curing ages of MCCPB in dry-wet cycles of the UCS tend first to increase, then decrease. Meanwhile, the stress-strain curve of the specimen shows that the trend in the elastic modulus is consistent with that of UCS (first increasing, then decreasing), and that, the minimum UCS value of the specimen still meets the early strength requirements of cemented paste backfill in coal mine geothermal utilization. On the one hand, it proves the feasibility of fly ash cement-solidified marine clay for use as cemented paste backfill in coal mines; on the other hand, it also expands the available range of cemented paste backfill materials in coal mines. Full article
(This article belongs to the Special Issue Simultaneous Exploitation of Coal and Associated Energy)
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20 pages, 5645 KiB  
Article
Basic Experimental Study of Plasticity Material for Coal Rock Fracture Grouting Based on RSM-PCA Technology
by Weitao Liu, Yueyun Qin, Xiangxi Meng, Lifu Pang, Mengke Han and Zengmou Song
Energies 2021, 14(15), 4516; https://doi.org/10.3390/en14154516 - 26 Jul 2021
Cited by 4 | Viewed by 1646
Abstract
The internal fractures in coal and rock mass are important factors affecting the safety of underground engineering such as coalbed methane exploitation, so the comprehensive properties of materials used to seal the fractures are particularly critical. In this paper, firstly, the indexes of [...] Read more.
The internal fractures in coal and rock mass are important factors affecting the safety of underground engineering such as coalbed methane exploitation, so the comprehensive properties of materials used to seal the fractures are particularly critical. In this paper, firstly, the indexes of the main factors affecting the plugging material (viscosity, bleeding rate, setting time, and strength) were analyzed. Then, the sensitivity of the materials used to seal the fractures was studied and discussed using a principal component analysis and response surface analysis (RSM-PCA). The primary conclusions are as follows: (1) Bleed rate and setting time were the first principal components affecting the comprehensive properties of the plugging materials, and compressive strength was the second principal component. (2) The regression equation was established to characterize the comprehensive properties of the integrated plugging materials, and the optimal mix ratio was 34% of cement content, 11% of sand content, and 0.53 of the W/C. (3) The microscopic results showed that the silicate minerals in the consolidated body grow in a bridging manner and formed a mixed gel with cement hydration product to fill the pores and microcracks and improved the interface transition zone. Full article
(This article belongs to the Special Issue Simultaneous Exploitation of Coal and Associated Energy)
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