| 摘要 |
PURPOSE: A charging structure for bore hole elastic wave exploration is provided to have high frequency characteristics without receiving the influence of pressure in the deep place. CONSTITUTION: A first pipe(20) of cylindrical shape is filled with gunpowder. The inner wall of a second pipe(30) is separated from the outer wall of the first pipe and has a predetermined space. One end of an explosion line(11) is connected to the gunpowder and the other end of the explosion line is exposed to outside. A charging space is filled with a filling. The filling is coarse-grained sand. A first waterproofing cap is formed on the top and bottom of the first pipe. A second waterproofing cap is formed on the top and bottom of the second pipe. |
