| On the basis of previous results,this paper studies formation of Luan coal mining area since the previous Permian tectonic movement,and analysis of geological structures in the formation process of the transformation of the role of coal by gas geological theories.Disscssing the tectonic evolution of the control characteristics of gas occurrence in Luan mining area,and obtained the collision between the Mesozonic plates, and Qinshui synclinorium Luan Coal Mining plays an important influence on the coal seam; the Yanshan-Himalayan tectonic movement control of the Luan Mining pattern of tectonic stress field in the formation of normal faults change group And extensive development of the NNE, NE to the cracks and NW, NWW to the fracture zone are conducive to the release of gas.Wangzhuang mine is a low gas mine, and reserving area is located in the southern part of Wangzhuang mine that is deeper generally than northern region, mining will enter the gas area with the increasing of depth Research analysis that the reserve area developed the SN trending, anticlinal fold.Gas deposit structure is complicated especially the syncline axis where gas content and gas pressure are relatively higher.This is the best parts of gas occurrence conditions; detailed analysis of the impact gas occurrence of geological factors in the zone of 3# coal seam, calculating and screening by gray method ,come to roof lithology correlation was 0.6519,synclinal axis correlation was 0.6484,depth correlation was 0.6117,the distance from the fault was 0.6081,seam gas content derived factors controlling coal seam depth ,local by structure (faults,folds)the impact,and use multiple regressiln analysis establishd a reserve area in Wangzhuang mathematical model of gas content,at last he regression equation was W=-0.6949+0.0056X1-0.1212X2–0.1439X3+0.7553X4.Forecasting the absolute gas emission in the coal mining and reserving area by gas geology statistics and separate source... |
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