Application Of 3D Seismic Prospecting Technology For Coal In Loess Plateau Area In Shaqu Mining Area

This paper takes the Shaqu coal mine in the Liliu mining area as the research harrow area,and conducts a systematic theoretical study on the 3D seismic exploration technology in the loess plateau area.By studying the generation principle,wave field and velocity characteristics of the interference wave in the loess plateau area,aiming at the actual seismic excitation conditions and surface structure characteristics of the mining area,a well-by-well depth design acquisition technology based on micro-logging survey,logging and drilling data is proposed.And designed a continuous symmetrical wideazimuth observation system.the seismic acquisition results with high signal to noise ratio and high resolution are obtained.According to the complex static correction of the 3D seismic data in Shaqu coal mine and the characteristics of the wave field,the 3D processing data processing flow and processing technology research are drawn up,focusing on the refraction-tomography combined static correction method,energy compensation technology,comprehensive denoising technology,and surface consistency Selection of processing efficiency technologies and parameters such as deconvolution technology and time migration technology.Through comparative analysis,the key processing technology and corresponding parameters of the mining area are obtained.Seismic processing results with high signal-to-noise ratio and resolution were obtained for T4(reflected wave formed by coal seam 4)and T8(reflected wave formed by coal seam 8).In particular,a comparatively traceable Ordovician limestone top interface was obtained.Reflected wave.The geological attributes of the coal seam reflection waves were calibrated through the seismic data,and the development characteristics of the coal seam waves in the Shaqu mining area were studied.Through the analysis of the seismic data,the development of the mining area structure was obtained;and the existence of faults and goafs affecting coal mining Research on special geological phenomena such as collapse columns and seismic attributes,combined with the application of seismic attributes and ant body technologies,predicts the damage of small fractures,collapse columns and coal seams in the mining area,and further improves the accuracy of coal mine geological results.