Application And Study On The Safety Appaisal Of The Mine Ventilation Sistem

In recent years, coal mine accident occurred frequently that threat to miners life and mine production facilities.So we concentrate our attention on coal mine safety universally. Mine ventilation system is the foundation of normal production environment and mine safety conditions. It also be the basis of mine production safety. Evaluating the safety of a mine ventilation system has the important practical significance. Mine ventilation system is a dynamic and complex system and there are many factors affecting its safety and stability. Therefore, when we evaluate the safety we should selection of safety evaluation index reasonably and guarantee the reliability of the evaluation results and are easy to the actual application.At present, there are many safety evaluation methods for the coal mine such as fuzzy comprehensive evaluation, BP artificial neural networks, and the analytic hierarchy process and so on. But these methods exist some defects in dealing with problems more or less, for example, using the maximum -minimum operator that loses a lot of original information, the calculation process is too complex, etc. Be aimed at the deficiency of existing safety assessment methods, this thesis has finished the following researches:1 Choosing 5 types of 25 evaluation index which relying on the principle of systematic, scientific, universality, testability, striving to cover all link of the whole ventilation system, consulting the "Security Rules for Coal Mine" and "quality standard of producing mine" and consulting the internal and external literatures, it sets up the safety evaluating index system dividing standards of the mine ventilation system; and carry on the safety assessment for this standard.2 Indentified the selected evaluation indexes weights using the improved analytic hierarchy process. In the classic analytic hierarchy process (AHP), the consistency inspection is necessary. In the practical applications, generally it also estimates roughly to adjust judgment matrix. Even though it is an effective way, after all it is blindness. It can't eliminate that need many adjustment to validate the consistency of possibility. Therefore, introduced the concept of the optimal transitive matrix to modify the AHP, meet consistency naturally and make out the weights directly. Thereby it is reduced the value of calculation steps and simplified calculation process.3 It is applied equivalent numerical method to establish the evaluation model of mine ventilation system. The method to calculate the process is simple. The result is intuitive; the resolution is high; and it is easy to be extended. Combined with the measured data of a coal mine, using this evaluation model of mine ventilation system to safety assessment, the conclusion is this mine is security. The results tally with the actual situation. It is proofed that the equivalent numerical method using in the ventilation system safety assessment is a beneficial attempt. It is deserved to popularize and apply.Due to the influence factors of mine ventilation system security is complicated, each coal mining technology conditions, ventilation mode, ventilation facilities are also different, so selected index evaluation is also different. The evaluation model is presented in this paper for safety assessment, allocate the weight of each index reasonably, and then make a scientific and reasonable evaluation result.