DETERMINATION OF LATERAL COVERING TIMES AND ASSUMPTION OF BROAD AZIMUTHAL DATA ACQUISITION IN 3D COAL FIELD EXPLORATION

An easy method for determining the lateral fold number of 3-D seismic swath is presented.It is described in details that the non vertical time error and selection method of vertical line direction.Based on existing conditions of 3-D seismic data acquisition in coal field,an assumption of 3-D broad azimuth data acquisition is provided to remove the disadvantages of non uniform azimuth distributions from old observation system.