Soft metal earthquake triggering apparatus and method for seismic exploration

Abstract

The invention relates to a soft-metal seism triggering equipment and a triggering method thereof in seismic exploration, which comprises a drop hammer and a seismograph; wherein, a metal is arranged under the drop hammer, one end of a connecting wire is connected with the metal, and the other end of the connected wire is connected with the seismograph, the end at which the connecting wire is connected with the metal is embedded in bipitch way, and the both ends of the bipitch-embedded connecting wire are peeled and are respectively hung outside the metal. The equipment can overcome shortcomings that the heavy hammer triggering can not be easily achieved through adopting the hammer plate communication way; the cymoscope can be easily damaged if arranged closely, and the cymoscope can not sensitively generate triggering signals if arranged too far through adopting the cymoscope triggering. The equipment has the advantages that the operation is simple, the malfunction can not exist and the time can be controlled, thus being applied to various triggering mediums.

Description

technical field [0001] The invention belongs to the field of geological exploration, in particular to a soft metal seismic trigger device and a trigger method in seismic exploration. Background technique [0002] The source trigger switch of seismic exploration is a link that cannot be ignored in seismic exploration. The existing earthquake triggering methods of non-explosive sources are generally divided into two types, the first is the hammer-plate connection type, and the second is the geophone triggering method. The trigger principle of the hammer-plate connected type is to fix the two ends of the timing line on the sledgehammer and the exciting metal plate respectively, and at the moment when the sledgehammer is excited downward and touches the metal plate, the circuit of the timing line is connected, and a signal is generated to open the trigger switch; The advantage is that it is easy to install, and there is no problem of failure; the disadvantage is that the excita...

AI Technical Summary

Problems solved by technology

The trigger principle of the hammer-plate connected type is to fix the two ends of the timing line on the sledgehammer and the exciting metal plate respectively, and at the moment when the sledgehammer is excited downward and touches the metal plate, the circuit of the timing line is connected, and a signal is generated to open the trigger switch; The advantage is that it is easy to install, and there is no problem of failure; the disadvantage is that the excitation hammer has a certain interference with the on-site work, there is a large probability of false triggering, and the timing accuracy is poor. Be applicable

The triggering principle of the geophone trigger mode is that the vibration is transmitted to the geophone at the moment when the sledgehammer hits the ground downwards, the electromagnetic coil inside the geophone generates vibration, and the electromagnetic induction excites the pulse signal, which causes the trigger; its advantage is accurate timing and easy installation. Simple; the disadvantage is that the cost is high, the failure rate is high, it is easy to be damaged by the seismic source, the installation distance is not easy to grasp, the installation point is too far from the falling weight point, the pulse signal generated is weak, the trigger switch of the seismograph cannot be turned on, and the geophone will be damaged if it is too close. Easily damaged, especially a free-falling sledgehammer can easily break it

Images