Slot wave seismograph, and underground clock calibration and time synchronization method thereof

Abstract

The invention discloses a slot wave seismograph, and an underground clock calibration and time synchronization method thereof and belongs to the technical field of geophysical exploration. An acquisition system and a triggering system are included, wherein the acquisition system includes an acquisition host and a plurality of acquisition stations, the trigger system includes a trigger recorder andan exploder, the acquisition host is connected with an underground explosion-proof notebook computer, the acquisition stations are connected with one another through large wires and sensors, the acquisition host is connected with the trigger recorder through a cable, and the trigger recorder is connected with the exploder; and the acquisition host records acquired seismic waveform data, the trigger recorder records detonator detonation time, and the acquisition host communicates with the trigger recorder through the cable to complete clock calibration and clock synchronization.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a channel wave seismograph and downhole clock calibration and time synchronization methods thereof. Background technique [0002] The channel wave seismic exploration method is an effective method for the application fields such as coal mine geological structure exploration and coal mine disaster prevention. High-performance channel wave seismic exploration instruments can effectively promote the application of the channel wave seismic exploration method in this field. [0003] Accurate recording of the triggering moment is one of the key performance indicators of channel wave seismic exploration instruments. There are two existing methods for recording the triggering moment. One is to transmit the signal of the detonator detonating the detonator to the main controller through a long line. The control machine records the triggering time; one is to record the signa...

AI Technical Summary

Problems solved by technology

The first method is limited by long lines, and is not suitable for blasting and acquisition operations in different tunnels; the second method requires that the clocks of the trigger recorder and the acquisition system of the channel wave seismograph are strictly consistent and time-synchronized

[0004] The existing method generally uses GPS time information to synchronize time on the well. This method has the following disadvantages: First, it usually takes more than 2 hours from the well to the actual operation, and the accuracy of clock synchronization is reduced due to the cumulative error of the clock; If the synchronization information is lost due to an unexpected situation during the operation, it is necessary to go uphole for clock synchronization, which greatly reduces the operation efficiency

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