Application Research About ISS Seismic Source Excitation In Fully-mechanized Face On Geological Exploration

The characteristics of rock pressure and the law of overlying strata The complex coal geological environment has resulted in low efficiency and high production cost of coal mining.It is a basic requirement for the fully mechanized coal mining face to be normal to promote the fully mechanized coal mining face by surveying and prospecting geological anomalies such as small faults and old workings.ISS has been widely used in geological exploration before the mining of fully mechanized coal mining face because of its more accurate detection of coal seam thickness and geological anomaly structure.It provides valuable geophysical prospecting data for the detailed mining plan of fully mechanized mining face.By using explosives excite ISS,seismic source is an important indicator to influence the seismic acquisition,and the selection of the charge and the excitation lithology directly affects the generation of the excitation effect and the acquisition of the subsequent information sources.When explosive waves are excited,the selection of explosive dose is an important problem.The excessive dose resulted in high interference level,difficulty in distinguishing effective waves,serious destruction of coal wall and even more serious safety problems.If the dose is insufficient,it will lead to the difficult resolution of waveform and reduce the accuracy of prediction.Besides,the location of the explosive is affected by the fracture zone and different coal quality.Through the finite difference method,the Abaqus software is used to simulate the wave of different dosage of the excited trough,and the best dose and the best position relation of the explosive under different environmental conditions are obtained.The actual area is numerically simulated by using different doses,and the influence degree of the dose on the result of in-seam wave inversion is obtained.The above conclusion is applied to the in-seam wave detection project of the 5308 working face of jin coal group Cheng Zhuang mine.Through data collection,data processing is carried out by trough wave seismic processing software,and the inversion results are obtained.According to the result of tomography,there are six abnormal areas in the work area,which are basically consistent with the actual results.The above research results are helpful to further study the mode of in-seam wave excitation,and reduce the risk of in-seam wave exploration in the process of implementation,and have certain reference value.