| Gas is the product of geological processes. Occurrence condition of coal seamgas today is the result that coal-bearing strata undergo complex geological history,suffering from gas generation, migration, storage conditions and other comprehensivegeological control.This paper uses the theory of regional geological evolution and the theory ofTectonic control gradually to research the gas occurrence regularity of M8and M9coalseam of Anshun coal mine in Zhina mining area Guizhou Province. In order to clarifythe Tectonic Control effect on gas occurrence, we firstly have studied the history oftectonic evolution and coal accumulation characteristics in Guizhou and analysed theinfluence and control on gas because of geological structure, researched the effect ongas generation, storage and migration because of tectonic evolution and sedimentaryevolution in Zhina mining area. we have analysed influence on different gas geologyfactor by NE-trending and NW-trending to combined control in The Zhina miningarea. Finally, we have analysed the effect of different geological factors on gascombining with the mine gas content, pressure data, used the method of mathematicalregression to predict the distribution law of mine gas content; predicted absolute gasemission of the working face by using forecast from different sources. Throughanalysing coal seam gas pressure and outburst prediction parameter of the M8and M9,Determined the outburst danger of the Anshun M8and M9mine, and divided the coaland gas outburst dangerous region danger region. Rresearch results above had beenadopted by Anshun coal mine, and play a good macro-guidance role in the gas disasterprevention work in Anshun coal mine. |
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