A kind of protection device and method for seismic source connection and protection of tunnel advanced geological prediction

Abstract

The invention discloses a tunnel seismic prediction hypocenter connection protection device and method. The device comprises an explosive protection shell and an external cover; an opening is formed at one end of the explosive protection shell, wherein the one end of the explosive protection shell is hollow, so that an explosive and the connection line of the explosive can be arranged in the opening; the other end of the explosive protection shell is provided with a plurality of detonator blocking sheets; one end of each of the detonator blocking sheets is fixedly connected with the explosive protection shell; the detonator blocking sheet tilts into or outwards from the explosive protection shell in a manner that the detonator blocking sheet entirely tilts relative to an end surface of the explosive protection shell; the external cover is detachably connected with the opening end of the explosive protection shell; when a TSP (tunnel seismic prediction) blasthole is charged, an instantaneous electric detonator will not be separated from an emulsion explosive due to the blocking of the detonator blocking sheets, and therefore, the successful generation of a TSP hypocenter can be ensured; the emulsion explosive can be connected with the instantaneous electric detonator onsite more conveniently and fast, and the time of entire TSP can be saved, work efficiency can be improved; and the quality of the hypocenter will not be affected. The TSP explosive and detonator connection protection device has the advantages of simple manufacture, low cost, easiness in operation and high practicality.

Description

technical field [0001] The invention relates to the field of advanced geological prediction of tunnels, in particular to a seismic source connection protection device and method for advanced geological prediction of tunnels. Background technique [0002] In the process of tunnel construction, in order to ensure the safety of the whole construction process, it is necessary to carry out geological advance prediction for the tunnel. The TSP advanced geological prediction method is a common method for geological advance prediction in the tunnel construction process. TSP advanced geological prediction adopts the principle of reflection observation. It needs to detonate the emulsion explosive through the instantaneous detonator as the seismic source, and receive part of the reflected seismic signal through the geophone, and finally analyze the corresponding data and draw a conclusion. In the process of TSP advanced geological prediction, the on-site connection and placement of exp...

AI Technical Summary

Problems solved by technology

And because the TSP blasthole is in the surrounding rock of the tunnel, the conditions are complicated. Some blastholes have a depth of nearly 2 meters, are straight blastholes, and all have a certain downward inclination. When pushed into the blast hole, there may be gravel or silt inside the TSP blast hole of the tunnel, and the uneven hole wall will easily damage the explosives, and if this device is used in the TSP blast hole, it will easily lead to the detachment of the explosives from the detonator, and there is no way to ensure that the explosives are in contact with the detonator. The detonator can remain connected during the process of being inserted into the blast hole, resulting in the detachment of the explosive and the detonator, and the TSP advanced geological prediction needs to fully inject water into the blast hole after the seismic source is installed to ensure the quality of the seismic source. In the prior art, it is used to dismantle the blasting explosives The detonator protection device of the package needs to be inserted into the plugging material, and the process of pushing the plugging material for compaction is very time-consuming, and obviously cannot be applied to the field of tunnel TSP advanced geological prediction

[0004] At present, there is no effective device that can solve the common problem that the explosive and the detonator are easily separated during the charging process of TSP advanced geological prediction. Usually, when connecting the explosive and the detonator on site, it is necessary to use the wire of the detonator to additionally bundle the explosive. The process takes a lot of time, which seriously affects the efficiency, and it is easy to tie loosely and cause the detonator to fall off during the charging process.

Images