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Application of risk evaluation in coalmine gas hazard based on model of SPA

TIAN Shui-cheng~1,WANG Li~1,LI Hong-xia~2(1 School of Energy Engineering,Xi'an University of Science & Technology,Xi'an 710054, China;2 School of Management,Xi'an University of Science & Technology,Xi'an 710054,China)  
The present paper is concerned with an analysis and a model of the three main categories of hazards-involving factors concerning the coalmining practice.As is known,the root of coalmining accidents is the threat of coalmine gas and the inability of human control over the different factors leading to such kinds of the mining hazards.Numerous as the studies in this way there may be few of them are done firmly based on the basis of the sound hazard theory analysis.Seeing the extreme importance of the theoretical analysis of the hazards of this nature,first of all,the paper has introduced the general approach to the classification of such hazards into three types based on the theory of set pair analysis,then investigated and compared the congruity,discrepancy and contrary trends of the safety-accident set pairs by way of SPA,pointing out that measures should be taken to control all the hazard factors,particularly,the second and the third to keep coalmining system safe and secure.Thirdly,a simulated model of gas hazards evaluation in coalmining practice has been established to secure the safety grade of the gas hazard by calculating and determining the connection degrees.In the given model,the evaluating index system herein provided is quite different from others with the second and the third categories of hazard indexes included.As a result,the whole evaluation process or practice can be made much more comprehensive and desirable.Last of all,a sample for practical use of the model has been given to show how to apply the model properly.Thus,the whole study demonstrates that the application of the SPA method to the practical gas hazard evaluation in coalmine production is simple,convenient and effective with its results being reliable,which is expected to offer a new perspective and prospect for such evaluation unascertained systems.
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