COAL ENGINEERING ›› 2014, Vol. 46 ›› Issue (1): 80-82.doi: 10.11799/ce201401026

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Analysis on dynamic disaster under hard overburden

  

  • Received:2013-07-26 Revised:2013-02-27 Online:2014-01-10 Published:2014-01-10

Abstract:

There is a hard overburden which 200m thick above coal seam of Xuandong coal mine. Through theoretical analysis and field measurement think hard overburden is the main source of power to underground dynamic disaster. The span length is increasing with the face advance, besides it gathers a large amount of elastic energy, then, leaving hidden danger for the mining. Last, combining the cause of underground dynamic disaster put forward the targeted methods to prevent the occurrence of rock burst and coal and gas burst.

Key words: underground dynamic disaster, hard overburden, prevention measures