Due tothecomplicatedgeologicalstructurewithincoalmines
in. China gas-relateddisasters particularlycoalandgasoutburst
events,,,, Arebecomingmoreserious.Comparedtominingactivities
worldwide,, Chinahasexperiencedthegreatestfrequencyand
intensity. Ofoutburst-relateddisasters [1]. Inthe2008reportof
National. CoalMineAccidentAnalysis coalandgasoutburst
accidents,, Becamethedominanttypeofgas-relateddisasterin
.Coal, minesinChina andoutburstsaccountedfor58.82%and
51.50%. ,, ofallgas-relatedaccidentsanddeaths respectively []. 2
WiththerapidsustainabledevelopmentofChina ', seconomy the
demandforcoalisincreasing therebyleadingtoanincreaseofthe
extent,, Anddepthofmining.ThedepthofcoalmininginChinahas
, increasedatanaverageof10mperyear andcertainminesare extendingtheirdepthatarateof. 20 - 50mperyear.Increasingin
.Miningdepthleadstoariseingroundstress gaspressureandgas
, content [,], 3 4 andthenumberandintensityofoutbursteventshas
, increasedinChinaeachyear.Severalshallowandnon-outburstcoal seams Aregraduallybecomingoutburst-pronecoalseams.Inparti -
cular manycoalminesinthecentralandeasterndevelopedareasof,,
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