Abstract:
In Gobi area with loose gravel bed,the seismic signal attenuates fast,making frequency and energy be lowered;in addition,the coal seam has a chang eable buried depth and steep dipangle.Aiming at this problem,we analyzed the difficulties of gat hering seismic data in coal field and proposed some corre-sponding technical countermeasures:Using car-drill into a hole in complex surface where has complex conditions and changeable water table;in the area where the burial depth of coal seam is shallow and the dipangle is less than 45°,a small order,a small amount of explosives,and mid-point shooting excitation are used;in the area where the burial depth of coal seamis big and the dipangle issteeper than 45°, a large orde,a small amount of explosives,and the endpoint excitation are used.