Study On The Feature Of Rock Burst And The Burtsting Liability In Bureau Of Da Tong

Rock burst was a dynamic phenomenon of the sharp brittle failure of wall rock with giant sonic, and thrown out of large quantity of rock or coal . made great loss of production facility, and storage capacity of coal. Moreover made great hazard to workers. So a study were made is necessary about the rock burst.This paper connect with the feature of rock bursting and ground stress testing in bureau of Da Tong, studied the condition of rock burst and the bursting liability, through the analysis of theory and numerical simulation and the experimental investigation. Analyzed the feature of rock bursting and the cause of the rock burst. Measured the tectonic stress and analyzed the stress condition by numerical simulation about the country rock under the stress. As a result the conclusion were drawn out: under the tectonic stress acting the rock burst easily. Other research were made is the relation of the failure mechanism of the rock burst and the problem of the bursting liability, given a new index—dump energy delivery speed index, it's can reflect the factor of...