Mining intrinsically-safe seismic source explosion excitation and synchronous triggering device used for coal mine underground seismic prospecting method

Abstract

The invention particularly relates to a mining intrinsically-safe seismic source explosion excitation and synchronous triggering device used for a coal mine underground seismic prospecting method, and aims to solve a difficult problem how to meet national security requirements and extract TB synchronous triggering signals at the explosive moment. The device comprises a housing; an impulse current mutual inductor comprises a magnet ring shaft sleeve, a magnet ring, a coil and a blasting bus-bar; the magnet ring is embedded on the outer side of the magnet ring shaft sleeve; the head end and the tail end of the coil are used as outlet wire ends; wire passing holes are formed in the two end surfaces of the magnet ring shaft sleeve; a printed circuit block assembled with a pulse shaping circuit and a double-protection circuit is arranged inside the housing, and a waterproof joint for penetrating a TB signal cable and an indicating lamp are arranged inside the housing; one end of the TB signal cable is connected with the double-protection circuit, and a connector plug is arranged at the other end of the TB signal cable. According to the invention, the feedthrough impulse current and mutual induction isolation technology and the pulse shaping double protection intrinsically-safe 'ib' explosion-proof technology are adopted, and a problem that the use of an electric-associated manner is limited, is solved.

Description

technical field [0001] The invention belongs to the technical field of mine geophysical exploration, and in particular relates to a mining intrinsically safe seismic source detonation synchronous triggering device suitable for underground seismic exploration methods in coal mines. Background technique [0002] The basic principle of the mine seismic exploration method is the same as that of the surface seismic exploration, and explosives are usually used as the "shock source" to excite seismic waves. In order to ensure that the seismic instrument can start data acquisition in time and accurately from the moment the source is excited, a detonation synchronous trigger device must be equipped between the source and the seismic instrument. Its working process is that when the "blasting" command is issued, at the moment when the detonator generates a high-voltage pulse to detonate the explosive, the synchronous trigger device for detonating the seismic source converts the pulse c...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the electrical association between the synchronous trigger device for seismic source detonation and the detonator using the traditional background technology is expressly prohibited by the relevant laws and regulations of the national coal mine safety.

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