Study on Dust Migration Law and Spray Dust Suppression Technology in Fully Mechanized Mining Face
Round 1
Reviewer 1 Report
The title of the article is " Study on Dust Migration Law and Spray Dust Suppression Technology in Fully Mechanized Mining Face ". This article discusses and analyzes the problem of dust pollution caused by the working procedure of coal mining and frame shifting in the fully mechanized mining face by using the simulation calculation method, and formulates the solution according to the discussion results. Specifically, according to the dust migration law under the working condition of the fully mechanized coal face, a specific and feasible spray dust control scheme is proposed. At the same time, the atomization performance and wind resistance of the nozzle are tested. The scheme has been applied to the production site and achieved good results, which has guiding significance for the flour dust control work in fully mechanized coal mining. However, I have a small suggestion that the article should discuss relevant research in more detail, so as to better understand the novelty of the article and its contribution to research institutions. This article is considered for acceptance, and minor revisions are suggested.
revise opinion:
1. The research status quo in this manuscript introduction occupies a large space, so the author is suggested to simplify it.
2. The size of the pictures in the manuscript should be as uniform as possible, and the author should make appropriate adjustments.
3. The geometric model of the fully mechanized working face established by simulation software described in Chapter II of the manuscript does not specify the number of hydraulic supports, spacing between supports and other parameters.
4. In the section of boundary conditions and parameter settings in the second chapter, please confirm the dynamic viscosity unit and correct it.
5. In the section of nozzle optimization, in addition to considering the atomization performance and wind resistance of the nozzle, please supplement the reason for choosing supersonic nozzle from the perspective of economy, water consumption, air consumption, etc.
6. The author shall supplement the range of particle size distribution of dust particles set in the simulation.
7. In the manuscript, the author mentioned that the smaller the droplet size is, the more fully the droplet particles are combined with the dust particles, and the better the dust reduction effect is. Please supplement the basis for this discussion.
8. The author did not explain the model of the instrument used for the on-site dust concentration test and the test workflow, so the author is requested to supplement it in the manuscript.
Author Response
Please see the attachment
Author Response File: 
Author Response.docx
Reviewer 2 Report
- Figure 7 is very small
- The graphs in Figure 8 are very difficult to read and it is not possible to see what is shown on each axis. Also, I don't find this type of graph a good fit for the topic.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Reviewer 3 Report
This is a very topical problem and it is necessary to continue similar studies for high wind speeds in future.
Notes:
Line 90- Section 2.1. need include reference
Figure 4,5.8 should be placed on separate sheets without separation
Figure 11 and Figure 12 need to separate
Line 316- should describe in detail how the wind speed was measured at the indicated heights
What will be the results at high wind speeds of 25-30m/s?
This is a very topical problem and it is necessary to continue similar studies for high wind speeds in future.
Notes:
Line 90- Section 2.1. need include reference
Figure 4,5.8 should be placed on separate sheets without separation
Figure 11 and Figure 12 need to separate
Line 316- should describe in detail how the wind speed was measured at the indicated heights
What will be the results at high wind speeds of 25-30m/s?
Thanks
Author Response
Please see the attachment.
Author Response File: Author Response.docx
