Next Article in Journal
Selecting Bacteria Candidates for the Bioaugmentation of Activated Sludge to Improve the Aerobic Treatment of Landfill Leachate
Previous Article in Journal
Stable Isotopes of Water and Nitrate for the Identification of Groundwater Flowpaths: A Review
Previous Article in Special Issue
Numerical Rainfall Simulation of Different WRF Parameterization Schemes with Different Spatiotemporal Rainfall Evenness Levels in the Ili Region
Open AccessArticle

Coupled Multifield Response to Coordinate Mining of Coal and Uranium: A Case Study

by Tong Zhang 1,2,3,*, Liang Yuan 1,2,3, Zhen Wei 1,2 and Yang Liu 1
State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China
School of Mining and Safety Engineering, An Hui University of Science & Technology, Huainan 232001, China
Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, University of Mining and Technology (Beijing), Beijing 100083, China
Author to whom correspondence should be addressed.
Water 2020, 12(1), 139;
Received: 29 August 2019 / Revised: 27 November 2019 / Accepted: 30 November 2019 / Published: 1 January 2020
(This article belongs to the Special Issue Advances in Hydrogeology: Trend, Model, Methodology and Concepts)
The coordinate mining of stack resources in the Ordos Basin, which involves the coupling effects of stress fracture, seepage, and reactive solute transport, plays an important role in resource exploration and environment protection. A coupled multiphysical–chemical model, involving a modified non-Darcy flow model, a leaching solution reaction, and a reactive solute transport model, was developed in this study. The Fast Lagrangian Analysis of Continua -Computational Fluid Dynamics (FLAC3D-CFD) simulator coupled with the developed models was used to investigate the evolution and morphology of mining-induced multifield coupling for the scenarios of concurrent mining and asynchronous mining of coal and uranium. As mining advanced to 160 m, the maximum principle stress characterized by a stress shell was observed. As mining progressed to 280 m, a rupture occurred, and a new stress shell was generated as a rear skewback was formed by the concentrated stress of the stope. An “arch-shaped” fracture field combined with a “saddle-shaped” seepage field was identified in the destressed zone of the stress shell. In the coordinated mining of uranium prior to coal, “funnel-shaped” and “asymmetric saddle-shaped” morphologies of the leaching solution were found during coal mining for ventilation in the stope and mining face. By contrast, “saddle-shaped”, “inclined funnel-shaped”, and “horizontal” morphologies of the leaching solution were observed for a short period for ventilation of the stope and mining face for coal mining prior to uranium mining, uranium mining prior to coal mining, and synchronized coal and uranium mining. A dynamic stress response was obtained in the coal seam, followed by the conglomerate aquifer and the uranium deposits. The diffusion depth of the solution was negatively correlated with the injection velocity and the pumping ratio and positively correlated with the diffusion coefficient. A dynamic increase in diffusion depth was observed as the diffusion coefficient increased to 1 × 10−4 m2/s. View Full-Text
Keywords: coordinated mining of coal and uranium; multiphysical–chemical model; FLAC3D-CFD simulator; multifield coupling coordinated mining of coal and uranium; multiphysical–chemical model; FLAC3D-CFD simulator; multifield coupling
Show Figures

Figure 1

MDPI and ACS Style

Zhang, T.; Yuan, L.; Wei, Z.; Liu, Y. Coupled Multifield Response to Coordinate Mining of Coal and Uranium: A Case Study. Water 2020, 12, 139.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop