Application research of two-dimensional seismic exploration in Zhangde Coalfield,Yuzhou City
The Zhangde Coalfield in Yuzhou City was located in the east of Songji tectonic area of the North China landmass,surrounded by Pingdingshan Coalfield,Xinmi Coalfield and Dengfeng Coalfield,which has a good metallogenic geological background.In recent years,with the increasing mining depth of coalfields,a series of structural faults have been found in the deep of coalfields.These fault structures are mostly the result of secondary fault structures of major fault structures such as Zhangde Fault(F,),Hutou Fault(F3),Nanguan Fault(F5),etc.,or the superposition of different fault structures in multiple stages,often showing relatively complex structural forms.At present,the shape,occurrence,distribution law and coal control characteristics of these fault structures are not clear,which re-stricts the production and exploitation of coalfields.Based on this,the theoretical research of two-dimensional seismic exploration in Zhangde Coalfield was carried out.The results showed that:①the seismic wave profile reflects the depth and relief pattern of the bottom interface of the Cenozoic in terms of the roof and floor of the coal seam,and the elevation of the bottom boundary of the Cenozoic varies from+50 m to-400 m,with the overall distribution characteristics of shallow west and deep east;②in terms of the occurrence charac-teristics of coal seam,it better reflects the buried depth and relief pattern of the bottom of coal seam Ⅱ1;③in terms of structural charac-teristics,seismic waves and fault structure show a good correlation,in which the main fault structures such as F,,F3 and F5 have a grea-ter impact on the spatial occurrence of coal seams,while the secondary fault structures have a certain impact on the distribution of coal seams,but the integrity of coal seams is not destroyed.
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