论文部分内容阅读
勘探区位于四川盆地与云贵高原的过渡地带,地形高差大、地层倾角陡、煤层薄、地质情况复杂,浅表层地震地质条件较差。通过实验,采用端点下倾方向激发的观测方法。在资料处理中,采用了多种静校正方法与去噪处理技术;在资料解释时,利用三维地震数据体等时水平切片、均方根振幅属性等多种方法对断层、陷落柱及采空区进行解释,其中解释溶洞2个,陷落柱1个,断层38条,并圈定了C13、C19、C25三层煤的采空范围。实践证明:若满足地形高差不超过500m、地层倾角不能大于45°、煤系地层上覆灰岩厚度不大于200m等条件,在四川山区开展煤田地震工作具有可行性。
The exploration area is located in the transition zone between Sichuan Basin and Yunnan-Guizhou Plateau. The terrain has large topographic differences, steep dip angles, thin coal seams, complex geological conditions and poor geological conditions in shallow epicenters. Through experiments, the observation method of end-point dip direction excitation is adopted. In the data processing, a variety of static correction methods and denoising processing techniques are used. In the data interpretation, the methods of isochronous horizontal slice, root mean square amplitude, The interpretation of the area, which explains 2 cave, collapse column 1, fault 38, and delineated the C13, C19, C25 three coal mined area. Practice has proved that it is feasible to carry out coalfield seismic work in the mountainous areas of Sichuan if the topographic elevation difference is not more than 500m, the dip of the strata can not be greater than 45 °, and the limestone thickness of the coal measures is no more than 200m.