CN207689681U - A kind of tunnel micro-seismic signal collection system - Google Patents

Abstract

The utility model relates to a tunnel microseismic signal acquisition system, comprising a data line, an A/D converter, a signal line, a first wave detector, a second wave detector, a third wave detector, a fourth wave detector, a fifth wave detector, The sixth detector, the seventh detector, the eighth detector, the ninth detector, the tenth detector, and a PC with a display; the PC is connected with the A/D converter through a data line, and the first The first detector, the second detector, the third detector, the fourth detector, the fifth detector, the sixth detector, the seventh detector, the eighth detector, the ninth detector and the tenth detector are respectively Connect with the A/D converter through the signal line. The utility model realizes the synchronous collection of single-component and three-component microseismic signal data while ensuring the accuracy and completeness of the collected data. At the same time, the collected microseismic data is displayed on the PC in real time and stored, which provides for the later calculation of the first arrival of microseismic events. precise raw data.

Description

A Tunnel Microseismic Signal Acquisition System

technical field

The utility model relates to a signal acquisition system, which belongs to the technical field of signal acquisition. More specifically, the utility model relates to a tunnel microseismic signal acquisition system.

Background technique

Microseismic monitoring technology has been widely used in the safety monitoring of dam mines, hydraulic fracturing monitoring in shale gas exploitation, stability monitoring of deep tunnels and other fields, and has achieved many remarkable research results. The basis for these results is Accurate positioning of microseismic events, and accurate picking of the first arrival of microseismic events is one of the necessary prerequisites for the positioning of microseismic events, so accurate picking of the first arrival of microseismic events is a necessary work in microseismic signal processing.

In the process of calculating the first arrival of microseismic events in deep tunnels, the original data of microseismic events must first be collected accurately and completely. In the past, microseismic signal stimulation often only collected single-component or three-component signals when collecting data, and the acquisition There is still the problem of inaccurate data collection, and the tunnel signal collection error is relatively large, which brings many unsafe factors to the actual tunnel detection.

Utility model content

Based on the above technical problems, the utility model provides a tunnel microseismic signal acquisition system. The acquisition system has the characteristics of simultaneous acquisition of single-component and three-component microseismic signals and the characteristics of accurate data acquisition, thereby solving the problem of tunnel microseismic signal acquisition in the prior art. Acquisition of single-component and three-component microseismic signals and technical problems of inaccurate data collection.

For solving above technical problem, the technical scheme that the utility model adopts is as follows:

A tunnel microseismic signal acquisition system, comprising a data line, an A/D converter, a signal line, a first detector, a second detector, a third detector, a fourth detector, a fifth detector, and a sixth detector , the seventh detector, the eighth detector, the ninth detector, the tenth detector, and a PC with a display; the PC is connected with the A/D converter through a data line, and the first detector, The second detector, the third detector, the fourth detector, the fifth detector, the sixth detector, the seventh detector, the eighth detector, the ninth detector and the tenth detector are respectively connected to the A/D converter connection;

The first wave detector, the second wave detector, the third wave detector, the fourth wave detector, and the fifth wave detector are single-component wave detectors, and the sixth wave detector, the seventh wave detector, the eighth wave detector, and the The nine detectors and the tenth detector are three-component detectors, the first detector, the second detector, the sixth detector and the seventh detector form a first detector group, and the third detector, the The four detectors, the eighth detector and the ninth detector form the second detector group, the fifth detector and the tenth detector form the third detector group, the first detector group, the second detector group and The third detector group is arranged sequentially along the length direction of the tunnel and the first detector group is arranged at the front end of the tunnel.

Based on the above technical solutions, the acquisition system also includes a monitoring station 15 located in the tunnel, and the PC 1, data line 2 and A/D converter 3 are located in the monitoring station.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are: the utility model is simple in structure, reasonable in design, easy to operate, and realizes synchronous acquisition of single-component and three-component microseismic signal data while ensuring all The collected data is accurate and complete, and at the same time, the collected microseismic data are displayed on the PC display in real time and stored, providing accurate raw data for the later calculation of the first arrival of microseismic events.

Description of drawings

Fig. 1 is the structural representation of the present utility model, and the arrow direction among the figure represents the tunnel excavation direction;

The labels in the figure are: 1. PC; 2. Data line; 3. A/D converter; 4. Signal line; 5. First detector; 6. Second detector; 7. Third detector ; 8, the fourth detector; 9, the fifth detector; 10, the sixth detector; 11, the seventh detector; 12, the eighth detector; 13, the ninth detector; 14, the tenth detector; 15. Monitoring station.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. Embodiments of the present utility model include but are not limited to the following examples.

A tunnel microseismic signal acquisition system as shown in Figure 1 includes a data line 2, an A/D converter 3, a signal line 4, a first detector 5, a second detector 6, a third detector 7, a fourth Detector 8, the fifth detector 9, the sixth detector 10, the seventh detector 11, the eighth detector 12, the ninth detector 13, the tenth detector 14, and a PC 1 with a display; The PC machine 1 is connected with the A/D converter 3 through the data line 2, and the first wave detector 5, the second wave detector 6, the third wave detector 7, the fourth wave detector 8, the fifth wave detector 9, the sixth wave detector The detector 10, the seventh detector 11, the eighth detector 12, the ninth detector 13 and the tenth detector 14 are connected to the A/D converter 3 through the signal line 4 respectively; the first detector 5, The second detector 6, the third detector 7, the fourth detector 8, and the fifth detector 9 are single-component detectors, and the sixth detector 10, the seventh detector 11, the eighth detector 12, the sixth detector The nine detectors 13 and the tenth detector 14 are three-component detectors, the first detector 5, the second detector 6, the sixth detector 10, and the seventh detector 11 form the first detector group, and the The third detector 7, the fourth detector 8, the eighth detector 12, and the ninth detector 13 form the second detector group, and the fifth detector 9 and the tenth detector 14 form the third detector group, The first geophone group, the second geophone group and the third geophone group are sequentially arranged along the length direction of the tunnel, and the first geophone group is arranged at the front end of the tunnel.

In this embodiment, the first geophone group, the second geophone group, and the third geophone group are sequentially arranged along the length direction of the tunnel, and the first geophone group is arranged at the front end of the tunnel (the front end of the tunnel excavation direction), so that the data is divided into distances. Acquisition, and each group of detectors is equipped with a single-component detector and a three-component detector, so that the single-component and three-component signal data can be collected at the same time during the acquisition, and each detector group is set at least 2 A single-component detector or a three-component detector, so that multiple single-component or three-component data can be collected for the same area during acquisition, and the acquisition is more accurate.

In order to facilitate equipment installation, use and maintenance, the acquisition system also includes a monitoring station 15 located in the tunnel, and the PC 1, data line 2 and A/D converter 3 are located in the monitoring station.

In this embodiment, in order to make the data measured by the first group of geophones more accurate, the first geophones are arranged on both side walls of the front end of the tunnel and are located on the same cross section of the tunnel. The first geophone 5 and The sixth detector 10 is located on the same side of the tunnel, the second detector 6 and the seventh detector 11 are located on the other side of the tunnel, and the vertical distance between the first detector 5 and the seventh detector 11 and the tunnel ground is the same. 2.9 meters, the sixth detector 10 is located above the first detector 5 and has a vertical distance of 3.2 meters with the first detector 5; The vertical distance between the seven detectors 11 is 1.6 meters.

In order to make the data measured by the third group of geophones more accurate in this embodiment, the third group of geophones is arranged on the two side walls of the rear end of the tunnel and is located on the same cross section of the tunnel. The distance between the third group of geophones The horizontal distance of the first detector group is 90 meters, the vertical distance between the fifth detector 9 and the tenth detector 14 and the tunnel ground is 2.9 meters, the fifth detector 9 and the seventh detector 11 It is arranged on the same side of the tunnel, and the tenth detector 14 is arranged on the same side of the tunnel as the first detector 5 .

In this embodiment, in order to make the data measured by the second group of geophones more accurate, the second group of geophones is arranged on the two side walls of the tunnel and is located on the same cross section of the tunnel, and the second group of geophones is located on the first The horizontal distance between the geophone group and the third geophone group and between the first geophone group and the third geophone group is 45 meters, and the third geophone 7, the eighth geophone 12 and the first geophone The detector 5 is arranged on the same side of the tunnel, and the fourth detector 8, the ninth detector 13 and the seventh detector 11 are arranged on the same side of the tunnel, and the fourth detector 8 and the eighth detector 12 are connected to the tunnel ground. The vertical distance is 2.9 meters, the third detector 7 is located above the eighth detector 12 and the vertical distance with the eighth detector 12 is 3.6 meters, the ninth detector 13 is located at the fourth detector 8 and the vertical distance from the fourth detector 8 is 2.2 meters.

The above is the embodiment of the present utility model. The foregoing are various preferred embodiments of the present utility model. If the preferred implementations in each preferred embodiment are not obviously self-contradictory or based on a certain preferred implementation, each preferred implementation can be used in any superposition and combination. The specific parameters in the above-mentioned embodiments and the embodiments are only for clearly expressing the utility model verification process of the utility model, and are not used to limit the patent protection scope of the utility model, and the patent protection scope of the utility model is still defined by its claims To be precise, all equivalent structural changes made by using the description and drawings of the utility model should be included in the protection scope of the utility model in the same way.

Claims (2)

1. a tunnel microseismic signal acquisition system is characterized in that: comprise data line (2), A/D converter (3), signal line (4), the first geophone (5), the second geophone (6 ), the third detector (7), the fourth detector (8), the fifth detector (9), the sixth detector (10), the seventh detector (11), the eighth detector (12), The ninth detector (13), the tenth detector (14), and the PC (1) of the display; the PC (1) is connected with the A/D converter (3) by the data line (2), The first detector (5), the second detector (6), the third detector (7), the fourth detector (8), the fifth detector (9), the sixth detector (10), The seventh detector (11), the eighth detector (12), the ninth detector (13) and the tenth detector (14) are respectively connected to the A/D converter (3) through the signal line (4); The first detector (5), the second detector (6), the third detector (7), the fourth detector (8), and the fifth detector (9) are single-component detectors, and the first The sixth detector (10), the seventh detector (11), the eighth detector (12), the ninth detector (13), and the tenth detector (14) are three-component detectors, and the first detector (5), the second detector (6), the sixth detector (10), the seventh detector (11) form the first detector group, the third detector (7), the fourth detector (8 ), the eighth detector (12), the ninth detector (13) form the second detector group, the fifth detector (9) and the tenth detector (14) form the third detector group, the first The geophone group, the second geophone group and the third geophone group are sequentially arranged along the length direction of the tunnel, and the first geophone group is arranged at the front end of the tunnel. 2. A kind of tunnel microseismic signal acquisition system according to claim 1, characterized in that: the acquisition system also includes a monitoring station (15) located in the tunnel, said PC (1), data line (2) And the A/D converter (3) is set in the monitoring station.