Dear Author(s),

We have received the review reports for your paper "**".

We require now that you implement in your submission the following recommendations made by the reviewers:

Reviewer A Comments:
==================
Suggestions which would improve the quality of the paper but are not essential for publication:
It should be "Gas and coal outburst" in key words
Writing about the modern methods used to assess the risk of outbursts should cite papers in this field for example:
Zhang Ruilin, Ian S.: LowndesThe application of a coupled artificial neural network and fault tree analysis model to predict coal and gas outbursts. International Journal of Coal Geology, 84 (2010) 141–152
or
Yu Zhu, Hong Zhang, Ling-dong Kon:Research of Coal and Gas Outburst Forecasting Based on Immune Genetic Neural Network. Proceeding WKDD '09 Proceedings of the 2009 Second International Workshop on Knowledge Discovery and Data Mining, Pages 28-31
or
Zhanglin Guo1, Qingke Song, Jun’e Liu: Application of projection pursuit clustering method in the evaluation of coal mine safety. Applied Mechanics and Materials Vols. 71-78 (2011) pp 4868-4871


Changes which must be made before publication:
Figuraes are too small
Fonts on the axes appear to be different.

Reviewer B Comments:
==================
Suggestions which would improve the quality of the paper but are not essential for publication:
The publication requires a proofreading. There is a number of syntax, grammar and punctuation issues, which sometimes make the article not clear. Linguistic corrections will allow to fully and correctly assess the article from the content-related perspective. Nevertheless, I have read this paper. I am sending a few preliminary comments and I expect a response from the authors.
Page 1
Line 29 and 30: Please correct K.A. De Jong surname and the title of the work (An analysis of the behavior of a class of genetic adaptive systems, Doctoral dissertation, University of Michigan)
Line 29: Have you got any citation of Goldberg’s article?
Page 2
Chapter 2: In this chapter you’ve repeated the following (or similar) sentence several times: “this method projected high dimensional data onto subspace of low dimensional “
line 15: Do you mean w(k) or v(k)?
line 21 and 23: What do you mean when you write "For indexes whose value were the bigger/smaller"? Bigger and smaller than what?
line 25: You defined vmin(l) and vmax(l) - and how do you define vmav(k)?
line 37: You made an editorial error in the formulae.
Page 3
line 1: The beginning of the sentence "Ez—z(k)(k=1~n)" is confusing. The description in lines 1-6 is also difficult to understand.
Line 11: What does “s.t.” mean? You did not define “p”. Why did you use -1.0 and 1? Please be consistent and use -1 and 1 or 1.0 and -1.0.
line 23: You wrote "obtained by 2.4 into formula (3)". What does 2.4 means?
line 32: You wrote "seam thickness varied in a large range". Would you mind to specify this range?
Line 33: You wrote "intricated grade of geological structure in Chaohua mine field was medium". "Medium" in what scale?
Page 4
Line 12: How do you define "tectonic complexity coefficient"? In what units are the values of coefficients Q1 - Q9?
Page 5
Line 9: Could you please provide a comment to Figure 1?
Line 15: You did not define delta.
Figure 2: In my opinion Figure 2 is misleading. By connecting points z1 to Z15 with a continuous line you suggest some linear relationship between these points. As I understand, there is no dependency between those points, and they are in the "location of working place" [m] 12, 272, 113, 244, 214, 389, etc. Perhaps, it would be better to connect these points by dotted line, or not connect them at all.
Line 21: You said "According to the trend of a scatter distribution, the samples were divided into 3 grades". Therefore, I assume that the last column of table II ("Grade of Risk&quot has been calculated by your method. Have you got any information on the hazard prediction in this areas done by the other methodology?
Line 24: What is the reference of the calculated hazard to reality? Are there any studies, which show the effectiveness of the proposed method? Is it known in which risk group (according to the proposed method) were the regions where the outburst of gas and coal occurred? Is there any research showing the effectiveness of the proposed method? Is it possible to define a risk group for regions where the coal and gas outbursts happened?

Page 6.
Conclusions:
Authors should compare their method with other methods of predicting rock and gas outburst. What is the correlation of the methodology proposed in the article with the hazard assessment carried out according to the current standards? What are the advantages of the proposed methodology over the methods, which are currently used? The authors should clearly demonstrate that achieved results are in correlation with the real state of hazard in the underground coal mines.
References:
I have noticed that some of the papers to which the authors refer to, are written in Chinese (it was not properly marked). Since a large number of potential readers are not familiar with this language, I suggest to remove references to papers that have not been written in English.

Changes which must be made before publication:
1)
The publication requires a proofreading. There is a number of syntax, grammar and punctuation issues, which sometimes make the article not clear. Linguistic corrections will allow to fully and correctly assess the article from the content-related perspective.
2)
Authors should compare their method with other methods of predicting rock and gas outburst. What is the correlation of the methodology proposed in the article with the hazard assessment carried out according to the current standards? What are the advantages of the proposed methodology over the methods, which are currently used? The authors should clearly demonstrate that achieved results are in correlation with the real state of hazard in the underground coal mines.

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