Seismic exploration elastic wave excitation method and used device
A seismic exploration and elastic wave technology, applied in the field of engineering geological exploration, can solve the problems of time-consuming and labor-intensive, the excited energy is difficult to meet the needs of the project, and the source of explosives is very dangerous, so as to achieve the effect of convenient operation
Pending Publication Date: 2018-06-19
GUIZHOU SURVEY & DESIGN RES INST FOR WATER RESOURCES & HYDROPOWER
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Problems solved by technology
Moreover, the source of explosives is very dangerous, and it is difficult to apply for approval, so it is difficult to meet the requirements of all aspects of the project
Non-explosive source: At present, the source of seismic exploration in engineering geological exploration is mainly excited by manually using a heavy hammer to hit the metal plate, which is time-consuming and laborious, and the excited energy is difficult to meet the needs of the project
Method used
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[0022] The method in this example is as Figure 1~3 As shown: the metal plate 1 is fixed on the ground through the fixing hole 11; the shock absorbing pad 17 is placed on the metal plate 1, and the electromagnetic device 2 is fixed on the metal plate 1 through the small threaded hole 13; The external thread 18 of the metal plate 1 is screwed with the large threaded hole 12 on the metal plate 1, and the discus 9 is placed on the top of the guide column 7. Turn on the power switch 6 and the powerful magnetic force generated by the electromagnetic device 2 attracts the discus 9, so that the discus 9 presses the arc-shaped shrapnel 22 on the shrapnel device 8 so that the arc-shaped shrapnel 22 shrinks into the ring groove 19 of the guide column 7, so that the discus 9 moves along the The guide column 7 strikes the metal plate 1 downward at a very fast speed, so as to excite elastic waves.
[0023] The device in this example is Figure 1~3 As shown: it mainly includes guide colum...
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The invention discloses a seismic exploration elastic wave excitation method and a used device. An electromagnetic device is used to control a discus to impact on a metal plate to generate elastic waves. That is, the metal plate is fixed on the ground, a guide rod vertical to the metal plate is fixed on the metal plate, and a cylindrical electromagnetic device is arranged at the bottom part of theguide rod. The discus in sliding connection with the guide rod is arranged on the guide rod, and an elastic piece device is arranged at the upper part of the guide rod. Before excitation, the discusis sleeved from the guide rod, and the discus is suspended at the top end of the guide rod. When excitation is needed, a power switch is pressed, the discus enables the arc elastic piece to be contracted in an annular groove of the guide rod under effects of an electromagnetic force, the discus falls quickly from the top end of the guide rod to knock on the metal plate, and the elastic waves are generated. By using the electro-magnetic characteristic, the discus impacts on the iron plate in a state of being higher than acceleration, and the elastic waves needed by seismic exploration are thusexcited. In comparison with the prior art, the operation is more convenient, time and labor are saved, and application in both land and water can be realized.
Description
technical field [0001] The invention relates to an excitation method for elastic waves in seismic exploration and a device used therefor, belonging to the technical field of engineering geological exploration. Background technique [0002] Currently, there are mainly two types of seismic sources used in seismic exploration: explosive sources and non-explosive sources. Explosive source: The explosive source has a wide frequency spectrum, which is suitable for seismic exploration of high frequency greater than 80 cycles / s, intermediate frequency of 15-80 cycles / s and low frequency of 6-15 cycles / s. The disadvantage of the explosive source is that all the energy cannot be used in the effective waves required for seismic exploration, and most of the energy is consumed to break the surrounding medium or form permanent deformation, and only part of the energy can be used as seismic interference. When detonating in dry loose rock, the effective energy is lower. In addition, the s...
Claims
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Login to View More IPC IPC(8): G01V1/147
CPCG01V1/147Y02A90/30
Inventor 常文凯刘定国杨荣芳汤从贵苏海鹏罗志远尹智力吴名剑朱明杰
Owner GUIZHOU SURVEY & DESIGN RES INST FOR WATER RESOURCES & HYDROPOWER