Coupled Multifield Response to Coordinate Mining of Coal and Uranium: A Case Study
Round 1
Reviewer 1 Report
Only some small corrections of your English could be provided
Author Response
Dear reviewer,
The authors would like to thank for the valuable comments that strengthen the quality of this paper.
Comment 1: Only some small corrections of your English could be provided
Reply: Thanks very much, it is a great suggestion. The English of this paper was corrected in the section of equation formation and grammar. Additionally,the discussion section was added.
Reviewer 2 Report
Dear Authors,
In my opinion the theme of the article is very actual and interesting for the readers of the journal.
The authors developed a coupled multiphysical-chemical model, involving modified non-Darcy flow model, a leaching solution reaction and reactive solute transport model.
The coordinate mining of stack resources in the Ordos Basin, which includes the link effect of stress-fracture-seepage-reactive solute transport field, plays an important role in resource exploration and environment protection.
A simulator (FLAC3D-CFD) coupled with the developed models was used to investigate the evolution and morphology of mining-induced multi-field coupling for the scenarios of concurrent mining and the asynchronous mining of coal and uranium.
This research shows a mining progressed to 280 m, and a rupture was obtained. A new stress shell was generated as the rear skewback was formed by the concentrated stress of the stope.
An "arch-shaped" fracture field combined with a "saddle-shaped" seepage field was presented in the destressed zone of the stress shell. Coordinated mining of uranium prior to coal, the "funnel-shaped" and "asymmetric saddle shaped" morphologies of the leaching solution was presented for ventilation in the stope and mining face during coal mining.
Distinctively, the "saddle-shaped", "inclined funnel-shaped", and "horizontal" morphologies of the leaching solution were presented in 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.
The authors show that the dynamic stress response was obtained in the coal seam, followed by the conglomerate aquifer and uranium deposits. The diffusion depth of the solution was negatively correlated with the injection velocity and pumping ratio and positively correlated to the diffusion coefficient. A dynamic increase in diffusion depth was observed as the diffusion coefficient increased to 1e-4 m2/s.
The paper is well structured, the title and abstract clearly describe the content of the manuscript, and the language is correct and clear. However, in my opinion, it is avoid a Discussion section. Also, the units must be formatted, according the international guides (i.e. 1e-4 m2/s by 1e-4 m2/s.
In my opinion moderate revision is needed.
Best regards
Author Response
Dear reviewer,
The authors would like to thank for the valuable comments that strengthen the quality of this paper.
Comment 1:However, in my opinion, it is avoid a Discussion section.
Reply: Thanks very much, it is a great suggestion. The discussion section was added, according to the valuable suggestion.
Comment 2: The units must be formatted, according the international guides (i.e. 1e-4 m2/s by 1e-4 m2/s.
Reply:Thanks for this comment. The formation, including units and equations, was modified, according to the international guides.
