淮南矿区三维地震探采对比效果与实例分析

淮南矿区十多年来开展的煤矿采区三维地震面积达到254.56 km2，占井田面积的46.14%。通过对以往三维地震成果1 030个验证点的统计分析，拟定了三维地震成果验证准确率的评价标准；据此得出常规三维地震勘探对13-1煤层中3 m以上断层解释的准确率达62.38%，11-2煤层中2 m以上断层解释合格率约46.74%；而高密度三维地震勘探对11-2煤层中2 m以上断层解释的准确率达到85.71%。结合实例研究，分析了小断层、煤层变薄区在三维地震资料上的显示特征与探采对比效果。 

Comparing 3D seismic prospecting with mining verification and case study in Huainan coal mine

3D seismic survey has been carried out in 254.56 km2 in Huainan coal mine area, which took up 46.14%of the total coal mine field.After analyzing the 1 030 verification points of the 3D seismic surveys we did in the past, we set up a standard for evaluating the accuracy of the 3D seismic interpretation results.Using this standard, we found that the accuracy can reach 62.38% when interpreting the faults of more than 3 m in 13-1 coal seam using general 3D seismic survey, and the accuracy changes to 46.74% while interpreting faults of more than 2m in 11-2 coal seam, but when applying high density 3D seismic survey to interpret faults bigger than 2m in 11-2 coal seam, this accuracy can increase to 85.71%.Based on case study on comparing seismic survey with mining, we analyzed the characteristics of small and median faults and thin-out belts of coal seam on the 3D seismic profile, and checked the validity.