Active source three-dimensional seismic advanced geological detection device and method in tunnel boring machine

Abstract

The invention discloses an active source three-dimensional seismic advanced geological detection device and method in a tunnel boring machine, which comprises a boring machine cutterhead and a boring machine main body connected with the cutterhead. A main control room is arranged inside the boring machine main body. There are controllers and multi-channel seismic wave data acquisition instruments in the room; seismic source systems are installed on the cutter head of the roadheader and the front end of the main body of the roadheader; It is connected with the multi-channel seismic wave data acquisition instrument, the seismic source system and the data acquisition system, and the multi-channel seismic wave data acquisition instrument is connected with the data acquisition system; the beneficial effect of the present invention is to realize the fast, flexible and automatic arrangement of the seismic source and the geophone system, and make full use of the roadheader Maintenance time greatly improves the work efficiency of geological advance forecasting, does not interfere with normal construction, and saves time and economic costs.

Description

Technical field [0001] The invention relates to the field of geological advance prediction in the construction process of a tunnel boring machine, in particular to an active source three-dimensional seismic advance geological detection device and method in the tunnel boring machine. Background technique [0002] Compared with traditional drilling and blasting construction, tunnel boring machine construction has significant advantages such as "fast digging speed, high hole quality, high comprehensive economic benefits, and safe and civilized construction". Developed countries such as Japan, the United States, Europe and other developed countries use boring machines for construction The proportion of tunnels exceeds 80%, and with the continuous development of tunnel construction in my country, tunnel boring machines will also be more and more used. At the same time, many engineering practices have shown that tunnel boring machines have poor adaptability to geological conditions. Geo...

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Problems solved by technology

[0005] ①The observation method is simple, and no effective three-dimensional space observation method is adopted, so it is difficult to obtain accurate wave field information of the surrounding rock mass, resulting in poor spatial positioning of abnormal bodies, and prone to problems such as omission, misreporting and misreporting

[0006] ② In order not to affect the normal construction of the tunnel boring machine, the advanced seismic wave detection needs to use the maintenance time of the roadheader as much as possible (about 2 hours per day) for detection, which puts forward requirements for the efficiency of the advanced seismic wave detection. The rapid installation device and method of construction tunnels lead to low detection efficiency and affect the normal construction of roadheaders

[0007] ③ The automation of seismic wave data processing needs to be further improved, the seismic wave migration imaging method needs to be improved, and the three-dimensional imaging, abnormal body spatial positioning and detection accuracy need to be improved

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