Research On Excitation Parameter Of The Seismic Exploration In Complicated Mountainous Area

With the rapid development of national economy and the increasing demand for energy, many coal mines increasing development efforts to the exploration of coal field.However, the work of collecting the field datas is difficult with the impact of poor seismic geological conditions, lateral changes of lithology and complex terrain in complex mountainous area. Many problems are increasingly prominent,such as the lower raw data signal-to-noise ratio,the static correction and so on.The rationality of the selection working to excitation parameter, directly affects the quality of data collection. But the data acquisition is the first premise to carry out the work of seismic exploration.Therefore the research on excitation parameter of the seismic exploration in complicated mountainous area is very important.For this reason, based on detailed analysis to complex mountainous seismic exploration in the area of geological condition and arounding the basic requirements of three tall that is high resolution, fidelity and signal-to-noise ratio of seismic data,this paper carry out a large number of the technology research and study to the problem of selecting excitation parameters for seismic prospecting of a certain mining area in Qinshui western coalfield of the province of Shan xi.First of all, on the basis of consulting a large number of literature and surveying the play structure of the mining area,this paper make the forward modeling research for the related excitation parameters problems of the typical geological model,taking advantage of the Tesseral-2D software technology of forward modeling of seismic wave field.The second, a large number of the experiments of excitation parameters are conducted for the depth and the dosage,in three kinds of seismic geological conditions of areas covered by loess in the egg, the beach gravel area and bedrock exposed area.By means of the indoor forward modeling and lots of provocation tests in the wild, some of the proposed conclusions have been achieved on excitation parameter of the seismic exploration in complicated mountainous area in the end:that is the feasibility of the forward modeling has been proved in the problem of excitation parameter; Stimulating horizon can control selection of the depth effectively, ensure the data’s ratio of the signal and noise and reduce interference of the surface wave; The excitation frequency should not been selected so small,we can improve it and quality of collected data through controlling the size of the quantity of explosive and stimulating horizon.Not only this article finds out the experience and technology thinking of selecting excitation parameters for3D seismic excitation to adapt to the similar complex mountainous areas,but also provides the technical theoretical guidance for the mine exploration and the layout of mining area in the mountains and expands the field of seismic exploration through this research.