Determining the measurement method and application of relative sensitivity for outburst sensitive indicators
Chen Yujia
Jiang Chenglin
Cao Tengfei
Fu Qiang
Abstract：Relative sensitivity is an indicator that reflects the changes in predictive indicators with the risk of coal seam outburst.It is based on the lowest measured values of each predictive indicator during the statistical period,and calculates and calculates the average and maximum relative sensitivity of each predictive value during the prediction period,quantitatively reflecting the sensitivity of each predictive indicator to the predicted risk of coal seam outburst.The prediction of mining face outbursts in three coal mines were tracked,the relative sensitivity of each prediction indicator was calculated,and the gas dynamic phenomena during the prediction period was ana-lyzed.The results indicate that the average relative sensitivity of unit length of borehole gas emission index was more than 2 times higher than other predictive indicators,and the highest value was more than 5 times higher than other indicators.The study provides a new ana-lytical method for determining sensitive indicators for predicting coal seams.
Keywords：coal and gas outburstprediction indexsoft stratificationsensitivitycritical value
Publication Date：2026-02-28
Online Publishing Date：2026-04-02(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )