Abstract
ABSTRACT Coupling dynamic disasters of coal and methane in deep coal mines tend to be more serious and complex. Therefore, it is essential to reveal the relationship between impact loading and methane emission in coal containing methane. This research aims to explore the effect of impact energy on methane emission characteristics using a self-designed experimental system. The characteristics and mechanism of methane emission from coal samples subjected to impact loading were analyzed and revealed. The results indicate that rate and amount of methane emission are positively correlated with impact energy. As the impact height increases from 0.2 m to 1.0 m, total methane emission time is shortened by nearly 71% and total methane emission amount is raised by nearly 88%. Impact loading can significantly promote fractures development of coal samples and subsequently enhance methane emission from coal samples. In addition, the control measures of abnormal methane emission in coal mine and the treatment method of coal seam for coalbed methane extraction are put forward. The innovative research results can provide theoretical basis for the control of coupling dynamic disasters and deepen its mechanism understanding.
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