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Applied Sciences
Special Issues
Disposal and Utilization of Mine Solid Waste
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Disposal and Utilization of Mine Solid Waste

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

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 2481

Special Issue Editors

Prof. Dr. Jixiong Zhang

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Guest Editor
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: backfill mining; solid waste disposal; strata control; mine functional materials; resource utilization
Dr. Meng Li

E-Mail Website
Guest Editor
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
Interests: rockmass mechanics; fractured rock mass; constitutive models; backfill mining; rock engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Nan Zhou

E-Mail Website
Guest Editor
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: backfill mining; cemented paste backfill materials; solid waste utilization; solid waste management
Special Issues, Collections and Topics in MDPI journals
Dr. Qiang Zhang

E-Mail Website
Guest Editor
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: backfill mining; solid waste disposal; strata control; intelligent backfill; environmental effects

Special Issue Information

Dear Colleagues,

Solid mine waste, including gangue, tailings, fly ash, etc., is released during the exploitation, separation and utilization of mineral resources. This leads to a series of safety and ecological problems, such as tailing dam accidents, spontaneous combustion of gangue dumps, atmospheric pollution, destruction of water environment, etc. There is currently a significant volume of underutilized solid mine waste, raising the risk of environmental degradation and resource waste. Therefore, the proper disposal and utilization of solid mine waste has emerged as a bottleneck impeding the harmonious development of mineral resources exploitation and environmental protection.

This Special Issue encourages scholars to present new perspectives, advances and challenges in the disposal and utilization of solid mine waste. Topics of interest include, but are not limited to, the following: developing solid-waste-based materials; turning waste into mine functional materials; novel disposal methods; efficient resource utilization; critical machine/equipment; eco-friendly underground backfill; sustainable solid waste management; insights into strata control; investigating environmental effects; other engineering applications.

Prof. Dr. Jixiong Zhang
Dr. Meng Li
Dr. Nan Zhou
Dr. Qiang 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. 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

  • solid waste disposal
  • backfill mining
  • resource utilization
  • functional materials
  • solid waste management
  • strata control
  • environmental effects

Published Papers (2 papers)

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Research

19 pages, 6971 KiB  
Article
A Theoretical Model of Roof Self-Stability in Solid Backfilling Mining and Its Engineering Verification
by Qiang Zhang, Kang Yang, Jixiong Zhang, Qi Wang, Longfeng Yuan, Zengzhu Shi and Xiling Xu
Appl. Sci. 2022, 12(23), 12114; https://doi.org/10.3390/app122312114 - 26 Nov 2022
Cited by 1 | Viewed by 877
Abstract
Roof self-stability in backfilling mining was proposed to explore its connotation and characteristics after a comparative analysis of roof structures under long-wall caving and backfilling mining. The mechanical analysis models of roof self-stability along strike and dip were established. After that, the mechanical [...] Read more.
Roof self-stability in backfilling mining was proposed to explore its connotation and characteristics after a comparative analysis of roof structures under long-wall caving and backfilling mining. The mechanical analysis models of roof self-stability along strike and dip were established. After that, the mechanical equations for cooperative roof control were constructed to analyze the elastic foundation coefficients of the backfill, support peak load, unsupported-roof distance, and drilling effect of the working face along strike, the size of the working face, and the section pillar effect along dip. Research showed that the roof self-stability was greatly impacted by the elastic foundation coefficient of backfill, and it was less impacted by the support peak load along strike. The unsupported-roof distance had no obvious effect on roof self-stability. Roof self-stability was significantly affected by the working face and coal-pillar length along the dip. Therefore, the engineering control method of roof self-stability was proposed. The backfilling engineering practice in Xinjulong Coal Mine showed that the maximum roof subsidence was 438 mm, and the backfill ratio was 86.3% when the supporting intensity of backfilling hydraulic support was 0.94 MPa; the advanced distance of the working face was greater than 638 m; the foundation coefficient of backfilling material was 4.16 × 108 Nm−3. The roof formed the self-stability structure, which satisfied safe coal mining under buildings, water bodies, and railways. Full article
(This article belongs to the Special Issue Disposal and Utilization of Mine Solid Waste)
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12 pages, 5882 KiB  
Article
Effects of Loading Stress and Velocity on Compression and Particle Breakage Behaviour of Waste Rocks in Backfill Coal Mining
by Yuming Guo, Jixiong Zhang, Meng Li, Wendy Timms, Lingling Shen and Pengjie Li
Appl. Sci. 2022, 12(21), 11175; https://doi.org/10.3390/app122111175 - 04 Nov 2022
Cited by 4 | Viewed by 1210
Abstract
Coal mine waste rocks, mainly broken gangue, can be used as filling materials to backfill into goafs. Under the overburden load, the backfill body is vulnerable to compressive deformation and particle breakage. With the increase in mining depth, the overlying strata will impose [...] Read more.
Coal mine waste rocks, mainly broken gangue, can be used as filling materials to backfill into goafs. Under the overburden load, the backfill body is vulnerable to compressive deformation and particle breakage. With the increase in mining depth, the overlying strata will impose different loads on waste rock filling materials at different loading velocities, which further affect the material compressive deformation and particle breakage. In this paper, an experimental scheme and a loading device are designed to study the influence of loading stress and velocity on the compressive deformation and particle size distributions of the backfill materials before and after compression. The results show that the axial strain of the gangue filling materials increases rapidly with the axial stress and then gradually stabilizes, showing a logarithmic functional relationship. Increasing the loading velocity will destroy the contact structures among the gangue particles and cause a larger deformation to the filling materials. When the loading stress is relatively low (5 MPa), the gangue particles with a size larger than 20 mm have a stronger bearing capacity compared with particles of 16–20 mm, which are the first particles to be crushed under these conditions. Further increasing the loading velocity will increase the breakage degree of the filling materials. The breakage ratio (BM) has a logarithmic functional relationship with the loading stress and the loading velocity. When the ground stress is lower than 5 MPa, the content of coarse particles should be increased to enhance the bearing capacity of the gangue materials; when the ground stress is higher than 10 MPa, the content of fine particles should be increased to reduce the porosity ratio and the particle breakage ratio. Full article
(This article belongs to the Special Issue Disposal and Utilization of Mine Solid Waste)
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