Study on Distribution of Gas Concentration in Air Return Corner Based on Co-Kriging Interpretation

Abstract

In order to study the distribution of gas concentration in air return corner, co-kriging is adopted to do the interpretation of gas concentration in air return corner and air volume is regarded as a covariate. The study is based on the gas concentration distribution in air return corner of 5916 working face in Longfeng coalmine and the results show that co-kriging interpretation results produce smooth curves of gas concentration distribution in air return corner. Gas in goaf of 5916 working face is mostly emitted from air return corner and the airflow velocity of air return corner is low and the airflow is in eddy state. The main dissolute could not dilute and excrete the accumulative gas. Therefore, gas in air return corner is an important dangerous source.