Research On Structural Characterisic Of Coal Mass Of No.8&10 Coal Seam In Sudong Mining Areas And Its Different Genesis

At present,classification of coal structure was researched more,but the cause of coal structure was researched less,valuable experience was gained by researching logging curve to distinguish tectonic coal.The character of coal structure of No.8&10 coal seam was analysed by explaining the drilling logging curve of No.8&10 coal seam in sudong diggings.The difference and the cause of coal structure of the difference and the cause of coal structure of No.8&10 coal seam was researched, with the view of geomechanics,fractal theory and coal petrology etc.The influence of structural coal to gas outburst and emission.Achievements and understanding was acquired as fllows.1.No.8 coal seam was very thick coal seam,coal structure was crushing,tectonic coal was developed in all the area,tectonic coal was layer distribution and thickness was in homogeneity.The account for tectonic coal was more in the total of coal seam in complex area in constitution.But coal structure of No.10 was relative integrity,the account for fragmentation coal and primary texture was a large proportion,distribution of tectonic coal was focused on structure complex block,such as axial zones of folds and concealed bend of east.The difference of coal structure was existed in different coal seam and in different part of the same coal seam.2.Coefficients of plane deformation was larger,the thickness of the structural coal was relative thicker.Also the fractal dimension value was larger;the thickness of the structural coal was relative thicker.So the structures development degree has great effect on tectonic coal.3.No.8&10 coal seam situated under the syncline neutral plane of Sudong,No. 8 coal seam was closer to neutral plane,it endured greater tectonic force,structure of faults and bedding sliding developed.No.10 coal seam was farther to neutral plane,it endured less tectonic force,bedding sliding less developed,coal body structure was relative integrity,the difference of coal structure was controlled by tectonic.4.Some difference existed in petrography composition of No.8&10 coal seam,it has some effect on coal structure.Telocolinite vitrinite of No.8 coal seam had high content and was fragile,but desmocollinites of No.10 coal seam had high content,and cementation was stronger and unease crushing,and structure was relative integrity. 5.Information of gas outburst hazard zone in a mine suggested,tectonic coal developed in the area of gas outburst hazard zone,and single thickness were all more than 0.5m,this all further showed tectonic coal was important factors for controlling coal and gas outburst,using index of structural coal for forecasting dangerous region of coal and gas outburst was feasible.