THE RESEARCH ON THE ACQUISITION TECHNOLOGY OF 3-D SEISMIC EXPLORATION IN COAL FIELD IN COMPLICATED MOUNTAINOUS AREA

It is difficult to acquire the 3-D seismic exploration data in coal field in the mountainous area due to complex topography and surface geology.The key is to find the appropriate acquisition technology which can be adopted in such areas.This paper mainly analyzes those complicated surface conditions in the course of the 3-D seismic exploration in mountainous Xin'an coal field,where the topography is extremely complicated,the relative height difference is big,the underground water level is fluctuating,and there is big lateral lithologic variation on the surface,and so on.We select the suitable excitation and receiving conditions by matching with the field survey results in the 3-D seismic exploration in coal field in mountains and apply many technical measures,such as the non-linear surveillance systems,to guarantee the quality of the seismic records so as to facilitate the seismic data processing and explanation at the next step.The research findings indicate that the technical methods used in the data gathering of the 3-D seismic exploration are effective,and have yielded good results.These methods are of reference value to the areas with similar surface geological conditions.