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Research on Green Mining Technology with Cemented Paste Backfill
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Research on Green Mining Technology with Cemented Paste Backfill

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Environmental Sustainability and Applications".

Deadline for manuscript submissions: closed (30 October 2023) | Viewed by 3331

Special Issue Editors

Prof. Dr. Lang Liu

E-Mail Website
Guest Editor
Energy School, Xi'an University of Science and Technology, Xi'an 710054, China
Interests: functional backfill; modification of magnesium slag; underground CO2 storage
Special Issues, Collections and Topics in MDPI journals
Dr. Zhuen Ruan

E-Mail Website
Guest Editor
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: cemented paste backfill; paste rheology
Prof. Dr. Wei Sun

E-Mail Website
Guest Editor
Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China
Interests: green mining; paste backfilling; comprehensive utilization of mine solid waste
Dr. Qiusong Chen

E-Mail Website
Guest Editor
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Interests: groundwater friendly backfilling; comprehensive utilization of solid waste from mining, dressing and smelting
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Cemented paste backfill (CPB) is an effective practical approach for green mining and the sustainable development of the mining industry because of its advantages of being safe, environmental, economic, and highly efficient. CPB can use solid waste in mines (tailings) to treat the two major hazardous sources (underground goafs and surface tailing ponds caused by mining). To introduce new ideas and achievements in the field of green mining with cemented paste backfill, we sincerely invite you to contribute a paper to the Special Issue “Research on Green Mining Technology with Cemented Paste Backfill" in Sustainability (IF=3.889).

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Tailing thickening;
  • Paste pipeline transportation;
  • Paste mixing and preparation;
  • Comprehensive utilization of solid waste;
  • Functional backfill;
  • Paste rheology;
  • Modification of slag;
  • Underground CO2 storage;
  • Environmental impact of CPB.

We look forward to receiving your contributions.

Prof. Dr. Lang Liu
Dr. Zhuen Ruan
Prof. Dr. Wei Sun
Dr. Qiusong Chen
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. Sustainability 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

  • tailings thickening
  • pipeline transportation
  • mixing and preparation
  • solid waste
  • functional backfill
  • paste rheology
  • CO2 storage
  • environmental impact

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Published Papers (2 papers)

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Research

16 pages, 11676 KiB  
Article
Numerical Study of Resistance Loss and Erosive Wear during Pipe Transport of Paste Slurry
by Jianhui Qiu, Minghua Tian, Debin Zhu, Chongchun Xiao, Bin Wen, Feng Bin, Hao Chen and Daolin Wang
Sustainability 2023, 15(15), 11890; https://doi.org/10.3390/su151511890 - 2 Aug 2023
Viewed by 1353
Abstract
Cemented paste backfill (CPB) as a solid waste treatment technology that prepares tailings as aggregate into a highly concentrated slurry to be transported to the underground mining area, is now widely used in mines. However, the pipeline resistance loss and erosion wear during [...] Read more.
Cemented paste backfill (CPB) as a solid waste treatment technology that prepares tailings as aggregate into a highly concentrated slurry to be transported to the underground mining area, is now widely used in mines. However, the pipeline resistance loss and erosion wear during CPB slurry transportation considering the coupling effect of inlet velocities, viscosities, and particle sizes have not yet been well evaluated and analyzed. Hence, the CFD-based three-dimensional network simulation of CPB slurry flow in an L-shaped pipe at different combinations of the three parameters was developed using COMSOL Multiphysics software. The results showed that the pipe resistance loss was most affected by the inlet velocity and viscosity, with the minimum pipe resistance loss occurring at an inlet velocity of 1.5 m/s, a viscosity of 2.0 Pa·s, and a particle size of 150 μm. In particular, pipe erosion wear was severest at the bend and was positively correlated with inlet velocity and particle size, and negatively correlated with slurry viscosity, with maximum pipe erosion wear occurring at an inlet velocity of 3.5 m/s, a viscosity of 3.0 Pa·s, and a particle size of 2000 μm. The findings would be important for the design of the CPB pipeline transportation, which will improve the safety and economic level of a mine. Full article
(This article belongs to the Special Issue Research on Green Mining Technology with Cemented Paste Backfill)
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17 pages, 4151 KiB  
Article
Optimization of Composite Grouting Material Proportioning Based on Regression Analysis Method
by Tao Qin, Yaozu Ni, Weixin Chen and Lei Tao
Sustainability 2023, 15(11), 9069; https://doi.org/10.3390/su15119069 - 4 Jun 2023
Cited by 3 | Viewed by 1333
Abstract
In order to improve the impermeability of ordinary “cement–water glass” double-liquid grouting material, this study prepares a composite grouting material with sodium bentonite, cement, and water glass as the main materials, water-reducing agent, and early strength agent as activators. In this study, orthogonal [...] Read more.
In order to improve the impermeability of ordinary “cement–water glass” double-liquid grouting material, this study prepares a composite grouting material with sodium bentonite, cement, and water glass as the main materials, water-reducing agent, and early strength agent as activators. In this study, orthogonal tests were conducted using an L16(45) orthogonal table and the test results were analyzed using regression analysis. Using bentonite instead of partial cement, the experimental factors of the bentonite ratio, glass slurry ratio, water-reducing agent admixture, and early strength agent admixture were used to study the laws of single-factor and two-factor interactions on the initial apparent viscosity, setting time, and compressive strength of composite grouting materials. After obtaining the optimal ratio of composite grouting materials, the mechanism of formation of material strength and seepage resistance properties was revealed. The results show that the mass ratio of bentonite to cement and the mass ratio of water glass to slurry have a large effect on the material properties, and there is an interactive effect of several factors at the same time. The optimal ratio of the material is 28.42% water, 36.58% cement, 6.20% bentonite, 0.04% water-reducing agent, 0.9% early strength agent, and 27.85% water glass. The microstructural analysis shows that the denseness of the stone body structure is enhanced, and thus the strength and impermeability of the material are improved. This composite grouting material improves injectability and seepage resistance and is more suitable for underpinning grouting of weakly cemented soft rocks, but the ratio optimization method and model used in this study can be applied to other materials. Full article
(This article belongs to the Special Issue Research on Green Mining Technology with Cemented Paste Backfill)
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