Risk Assessment of Water Inrush from Coal Seam Roof Based on Combination Weighting-Set Pair Analysis
Round 1
Reviewer 1 Report
High water contained strata also cause roof bolt deterioration issues over time.
The main research question of this manuscript is potential water inflow into coal mines due to geological factors to understand risk potential. It is especially important to understand to effects potential water inflow into mines and understand risk, which is especially important with old mines above. And this article is a positive addition to existing publications on related topics, which will help mines understand geologic effects to water inflows, I have seen and experienced these effects. It also effect deterioration of steel such as bolt, but not mentioned in the paper as it is just looking at flow rates.
The paper is well written for water flow potential concerns. Its conclusions are consistent with the evidence and arguments presented. A good methodology process.
Author Response
Response: This paper mainly analyzes the influence of hydrogeological factors in mining area on the water abundance and water inrush risk of roof aquifer which affects the safe mining of coal seam. No.221 mining area in Shilawusu mine field is the first mining area, and the working faces are newly arranged, so there is no influence of goaf water in old mining areas on steel deterioration.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The manuscript is a very good contribution to the its field and can be accepted after considering following comments.
Line 37 : In the introduction section, the sentences are not clearly understood. Revise them.
Line 49: its is not suitable to use word scholars or experts. Use researchers instead.
Line 92-92: The results should not be discussed in these lines. Only objectives should be written.
Line 96: In methodology, local geology regarding soil should be discussed.
Caption of Table 1 should be written in detail.
Figures should be improved with larger font style.
Author Response
- Line 37 : In the introduction section, the sentences are not clearly understood. Revise them.
Response: We have revised this sentence to make it clearer.
- Line 49: its is not suitable to use word scholars or experts. Use researchers instead.
Response: Thanks, modified.
- Line 92-92: The results should not be discussed in these lines. Only objectives should be written.
Response: We have deleted the sentence describing the research results and significance at the end of the paragraph.
- Line 96: In methodology, local geology regarding soil should be discussed.
Response: We added a description of the landform within the mining area in the general section. However, the coal seam in Shilawusu mining area is buried deeply and is not affected by the surface overburden. The valleys in the mining area are undeveloped, and occasionally low-lying water accumulates in rainy season. Therefore, it is considered that surface water and soil are not the water inrush factors in coal seam mining.
- Caption of Table 1 should be written in detail.
Response: We have revised the Caption of Table 1.
- Figures should be improved with larger font style.
Response: We have improved the figures with larger font style.
Author Response File: Author Response.pdf
Reviewer 3 Report
This paper proposes a risk assessment of water inrush from coal seam roof based on combination Weighting–Set Pair Analysis, which comprehensively considers the combination of subjective and objective evaluation methods and set pair analysis. The paper is generally well-structured, but there are still some issues which need to be addressed.
1. The improved analytic hierarchy process can be abbreviated as IAHP, and the full name and abbreviation of the name shall be indicated when it first appears.
2. Supplement basic annotations such as Compass and Legend in Figure 1.
3. Check the superscript and subscript of the numerical unit of the full text.
It is suggested that the paper be published after a minor revision.
Author Response
Comment 1: The improved analytic hierarchy process can be abbreviated as IAHP, and the full name and abbreviation of the name shall be indicated when it first appears.
Reply: We have changed the abbreviation of the improved analytic hierarchy process to IAHP, and marked the first place of this term in the text.
Comment 2: Supplement basic annotations such as Compass and Legend in Figure 1.
Reply: We have optimized and improved the figures according to the expert's opinion.
Comment 3: Check the superscript and subscript of the numerical unit of the full text.
Reply: We have checked and modified the format of the upper and lower subscripts of the full text.
Reviewer 4 Report
Based on the 221 mining area of the Shilawusu coal mine，This paper selected as evaluation indexes for predicting the water inrush risk from the coal seam roof and established a hierarchical prediction and discrimination model of water inrush risk based on combination weighting–set pair analysis . The factors considered in the model are not comprehensive, which need to involve the mining layout, mining method, coal seam inclination and the physical and mechanical parameters of the roof and floor. Secondly, the calculation results of the model should be compared with the engineering practice, and the engineering practice verification should be carried out. It is suggested to supplement the engineering practice to verify the research results.
Author Response
- The factors considered in the model are not comprehensive, which need to involve the mining layout, mining method, coal seam inclination and the physical and mechanical parameters of the roof and floor.
Response: Based on the lithology, this paper focuses on the analysis and evaluation of the original rock's water abundance, and then predicts the water inrush risk. Therefore, there is little consideration on the physical and mechanical parameters of roof and floor rock that affect the mining damage. The mining layout, mining method and dip angle of coal seam in the study area are described in the general situation of the study area, but these factors are not the key factors that affect the water abundance and water inrush risk of coal seam roof.
- Secondly, the calculation results of the model should be compared with the engineering practice, and the engineering practice verification should be carried out. It is suggested to supplement the engineering practice to verify the research results.
Response: We selected six hydrological boreholes in different sub-regions of the working face, and substituted the borehole data into the aforementioned prediction and discrimination model to verify the final division results of the model. It can be seen from Table 6 that, after calculation, the risk evaluation index E values of six hydrological holes constructed in the later period are basically consistent with the actual hydrological detection results of this hole, so the prediction results of this model are more accurate.
Author Response File: 
Author Response.docx
