地震体曲率在采煤工作面断层重预测中的应用

Application of Seismic Volumetric Curvatures in Fault Re-prediction of Coal Faces

采煤工作面形成后,巷道新揭露的断层必然与三维地震数据的解释成果存在一定差异,需在回采前对工作面内断层重新预测。三维地震数据中包含了大量未曾发现的有用信息,若能将巷道实际揭露情况与三维地震数据相结合开展断层的重预测,必能有效提高重预测结果的准确性和适用性。体曲率为工作面断层的重预测提供了简便方法,根据揭露断层的产状确定计算参数,由叠后地震剖面生成体曲率属性,属性体的顺煤层切片能够有效反映目标断层形态。采用任家庄110905工作面三维地震数据和回风巷、运输巷断层测量数据开展验证,结果表明:由揭露断层的实测落差获得波长参数,由此参数生成的体曲率属性能够较好的反映出DF6与DF12及伴生断层在110905工作面内的延展情况,可为断层预测和回采方案调整提供可靠依据。

After the formation of a coal face,there will inevitably be some differences between the exposed faults in roadways and the interpretation result of the 3D seismic data.It is necessary to re-predict faults in the face before mining.The seismic data contains much useful information that has not been discovered.If the exposure of faults can be combined with the 3D seismic data to re-predicte faults.It will effectively improve the accuracy and applicability of the re-prediction results.The volumetric curvature provides a simple method for re-predicting faults in coal faces.The calculation parameters are determined based on the occurrence of the exposed faults,and the volumetric curvature attributes are generated from the stacked seismic section.The slice along the coal seam of the attribute body can effectively reflect the shape of the target fault.The validation was conducted using 3D seismic data and faults measurement data from the two roadways of the Renjiazhuang 110905 coal face.The result showed that the wavelength parameters were obtained from the measured exposed faults.The volumetric curvature attributes generated from these parameters can better show the extension of the DF6,the DF12,and other associated faults in the 110905 coal face.It will provide a reliable basis for fault prediction and adjustment of mining plans.