کاربرد فرآیند تحلیل سلسله مراتبی در سیستم پیشگیری از گاز معدن

In the assessment of mine gas prevention and control system, how to determine the weight of every main influence factor is a significant problem. In order to construct the mine gas prevention and control system sufficiently and reasonably, it is necessary to study the assessment indexes of the mine gas prevention and control system with the method of analytic hierarchy process, and determine the weight of each index, in the meantime, base the assessment on the quantization result of indexes. The study result shows that the main factors in the mine gas prevention and control system are gas monitor, gas outburst, ventilation condition and gas drainage. The weight value of each factor is determined through the method of analytic hierarchy process. The analysis results calculated accord with the practical situation, thus providing the direction for the survey of the assessment of the mine gas prevention and control system.

Coal is the major energy in our country, whose proportion occupies more than 70% in primary energy consumption. More than 95% coal mine in our country are mined underground, the occurrence condition in the coal seam is poor and the geological diversity is va ried. The disaster from the gas, water,fire and the floor threatens the work safety underground constantly. Among them, the gas disaster is the most serious[1]. According to the information announced on the website of State Administration of Work Safety, the total number of the gas accidents happened in the first half year of 2011 involved 62,245 people dead[2].Therefore, the whole level of the coal mine gas prevention must be promoted, and the assessment of its prevention system must be accurate, thus to guarantee that the system can reach the requirement of thenational gas comprehensive treatment. In recent years, the method of AHP has been applied vastly in every coal mine field[3-8]. The AHP builds the hierarchical assessment system firstly, and each hierarchy responds to the single target of the last hierarchy. In the same hierarchy, all the factors compare with each other. Then we have to determine its own importance degree and the order, and form the weight vector in the end, thus to distinguish their strengths and weaknesses. It is a practical assessment analysis method which combined the qualitative method and the quantitative method together. Since when we assess the condition of the coal mine gas prevention system, it is difficult to get the accurate result with the traditional qualitative expert assessment method, besides, it also exists difficult using the quantitative method due to the differences of each index importance and its values. Therefore, the application of the AHP method is afavourable approach to solve this problem. According to the analysis mentioned above, this paper adopts the AHP theory to assess the system based on the work experience of the coal mine gas prevention. And determine the weight of each factor that influences the system, thus attempting to analysis the function of the coal mine gas prevention system in safety production qualitatively and quantitatively, and then guarantee the safety of the coal mine consequently.

(1) According to AHP, established system evaluation structure of mine gas, it includes three hierarchies: the first evaluation target is the condition of mine gas prevention and control system; the second hierarchy evaluated four main aspects of mine gas prevention and control system, that are gas monitoring, gas management, ventilation and the gas drainage; The third hierarchy evaluated eight index, just an the monitoring system operation, monitoring staff and so on. Through AHP calculation method, the weight of each evaluation index was determined, and the quantitative results can be used as the important evaluative basis for prevention and control of mine gas.(2) AHP combined quantitative analysis method with qualitative analysis method, is a method that can give an objective description about the subjective judgment. It is used in the evaluation system of coal mine gas prevention and control, and could consider all views synthetically, through the communication and coordination between various aspects, and ensure the coal mine safety in production.