Secondary Prediction of Working Face Dynamic Disasters Based on Relational Grade Analysis

In order to improve the practicability and validity of mine dynamic disaster prediction, on the basis of the primary forecast of related coal seam dynamic disasters, fully considering the extraction effect and the effect of mining engineering, based on the correlation analysis and calculation of correlation theory prediction parameters, the model of mine dynamic disasters of specific working face had been found out, the secondary prediction model of working face dynamic disasters was established, the dynamic disasters prediction had been realized. Taking JI₁₅-17200 working face in the No.12 mine of Pingdingshan as the example, the risks of dynamic disaster under the natural condition, taking measures of gas extraction and driving to the stopping line had been respectively predicted while compared with the actual coal mining. The results showed that the method had higher accuracy of mine dynamic disaster prediction, which improved the security and stability of the coal mine production.