Anti-seismic equipment and method for underground cavern

Abstract

The invention discloses an anti-seismic device and method for an underground cavern, and belongs to the field of underground engineering development and utilization. The seismic intensity transmitted into the underground cavern is obtained by monitoring the seismic wave velocity, the damage state of the surrounding rock supporting system is monitored, comprehensive analysis is carried out through the anti-seismic control system, and the corresponding anti-seismic system modes, namely the flexible spring anti-seismic system and the rigid hydraulic anti-seismic system, are determined to be adopted. Wherein the flexible spring anti-seismic system is used for low-intensity seismic resistance of the underground cavern, and the rigid hydraulic anti-seismic system is used for high-intensity seismic resistance of the underground cavern. By means of the panel stress system, loading force of the flexible spring anti-seismic system and the rigid hydraulic anti-seismic system acts on a protected surrounding rock body, and the panel stress system can be quickly popped out along a rail through high-pressure gas and is used for meeting the anti-seismic timeliness requirement of an underground cavity.

Description

Technical Field

[0001] The present invention relates to the field of safe development and utilization of underground caverns, and in particular to an anti-seismic device and method that can be used in underground caverns. Background Art

[0002] It is generally believed that compared with ground buildings, underground caverns are relatively less affected by earthquakes. The main reason is that underground caverns have stable mountain support, and the impact is weakened after the wave velocity incident on the underground cavern is reduced. Therefore, the seismic theory and equipment for underground caverns have not been fully studied. However, as human activities continue to move deeper, the geological environment is more complex, and the proportion of incomplete rock mass may increase. If faced with earthquakes, surrounding rock damage of different intensities may still be formed. Once the underground cavern is unstable due to earthquakes, the consequences are serious, and it is very easy to induce a series of secondary disasters, which will have a serious impact on the project. Due to the uncertainty of seismic wave transmission, the current stage mainly uses numerical calculation methods to carry out relevant seismic research, which is limited to cavern layout or strengthening anchor rods and anchor cable support, and has failed to form strong and targeted seismic equipment. The limitation of previous research is that there is no relatively mature theoretical method and system. Therefore, the present invention establishes a seismic equipment and method that can be applied to underground caverns of different intensities, which has important practical significance for ensuring the stability of surrounding rocks under earthquakes. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to overcome the shortcomings of the prior art and provide a seismic device and method that can be used for underground caverns. It can provide a rapid response seismic device for underground caverns corresponding to different earthquake intensities based on numerical simulation results and real-time multi-source monitoring information, and finally form seismic devices and methods that can be applied to underground caverns of different intensities to ensure the stability of surrounding rocks under earthquakes.

[0004] Technical solution: The present invention provides an anti-seismic device and method that can be used in underground caverns, including using a wave velocity and support monitoring system to monitor the earthquake wave velocity entering the cave and the damage data of anchor rods, anchor cables and other support systems under the action of seismic waves, and analyzing the monitoring data through a seismic control system. If the threshold for starting the anti-seismic device is reached, the flexible spring anti-seismic system and the rigid hydraulic anti-seismic system are selectively started according to the earthquake intensity. At the same time, after the anti-seismic system is started, the panel bearing system should be quickly put into place to form a unified whole with the spring and hydraulic support to ensure that rapid and sufficient supporting force can be applied to the surrounding rock.

[0005] Furthermore, based on the regional geological data, numerical calculation and analysis methods are used to calculate and analyze the stability of the surrounding rock of the underground caverns under the action of earthquakes, and the areas that are vulnerable to earthquakes are extracted.

[0006] Furthermore, according to the revealed geological conditions and the vulnerable areas obtained in the numerical calculation, a flexible spring seismic system and a rigid hydraulic seismic system are permanently arranged. The two seismic systems should be firmly fixed to the bottom plate to provide sufficient support for the surrounding rock.

[0007] Furthermore, the flexible spring seismic resistance system should be arranged before the rigid seismic resistance system, closer to the surrounding rock. When the supporting force provided by the flexible spring seismic resistance system is not sufficient to resist the strong earthquake, the rigid seismic resistance system will be automatically started.

[0008] Furthermore, fiber Bragg grating is used to monitor the seismic waves entering the cave, and the measuring and monitoring instruments should be arranged in low-disturbance areas to avoid interference with the monitoring of seismic waves. When the monitoring reaches the level VI seismic wave input, the seismic control system is triggered.

[0009] Furthermore, comprehensive monitoring equipment such as anchor rods, anchor cable dynamometers and multi-point displacement meters are used to monitor the damage of anchor rods and anchor cable support systems. When the flexible spring anti-seismic system still cannot ensure the stability of the surrounding rock after the action, and the change range of the anchor rod and anchor cable dynamometer reaches 30% or the displacement change range measured by the multi-point displacement meter reaches 20%, the anti-seismic control system is triggered.

[0010] Furthermore, the panel bearing system guide rails are arranged along the axis of the underground cavern, and the height of the guide rails should be more than 10 cm higher than the bottom plate elevation.

[0011] Furthermore, the panel is arranged in a high-pressure gas storage cabin under normal working conditions. Nitrogen is preferably used as the high-pressure gas, and the gas pressure should be calculated based on the panel pop-up speed, pop-up displacement, etc., and should generally be greater than 5MPa.

[0012] Furthermore, the high-pressure gas storage warehouse should have good thermal insulation properties to ensure that the gas maintains a stable state. The temperature change is required to be less than 1 degree Celsius per month, and the temperature changes should be monitored monthly, and timely maintenance should be carried out if any abnormalities are found.

[0013] Further, when the panel support system is popped into place, the spring or hydraulic support should immediately act on the center position of the panel to ensure that the panel does not rotate under bias.

[0014] Furthermore, the spring is in a contracted state under normal working conditions, and the hydraulic support is in a state without hydraulic oil under normal working conditions. When the anti-seismic system is triggered after analysis by the anti-seismic control system, the spring is controlled to pop out or the hydraulic control valve is opened through the solenoid valve.

[0015] Furthermore, when the earthquake conditions return to normal conditions, the seismic support system should be gradually withdrawn to ensure that the surrounding rock does not suddenly break.

[0016] Beneficial effects: The present invention provides an anti-seismic device and method that can be used in underground caverns. It can construct an automated flexible-rigid anti-seismic system based on multi-source monitoring information, and establish an anti-seismic device and method that can be applied to underground caverns of different intensities, which has important practical significance for ensuring the stability of surrounding rocks under earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the earthquake-resistant system of the present invention is DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the described examples.

[0019] Embodiment: A seismic device and method that can be used in underground caverns, such as Figure 1 shown.

[0020] Including 1. Anti-seismic control system; 2. Wave velocity monitoring system; 3. Anchor rod and anchor cable support monitoring system; 4. Panel bearing system; 5. Metal panel; 6. High-pressure gas storage tank; 7. Track; 8. Hydraulic head; 9. Hydraulic electromagnetic control valve; 10. Rigid hydraulic anti-seismic system; 11. Spring; 12. Spring telescopic electromagnetic control valve; 13. Flexible spring anti-seismic system.

[0021] The specific implementation steps of this example are as follows: By using numerical calculation method, the damaged area of ​​the surrounding rock of the underground cavern under the action of seismic waves is extracted, and a rigid hydraulic seismic resistance system 10 and a flexible spring seismic resistance system 13 are permanently arranged in the relevant area.

[0022] The wave velocity monitoring system 2 and the anchor rod and anchor cable support monitoring system 3 are arranged in the quiet area of ​​the tunnel entrance and in the internal support system of the surrounding rock, respectively.

[0023] When an earthquake occurs, the wave velocity monitoring system 2 transmits the seismic wave velocity monitoring data to the seismic control system 1, and the anchor rod and anchor cable support monitoring system 3 transmits the support damage information to the seismic control system 1. After analysis and judgment by the seismic control system 1, it decides whether to start the rigid hydraulic seismic system 10 and the flexible spring seismic system 13.

[0024] When the flexible spring anti-vibration system 13 is turned on, the spring telescopic electromagnetic control valve 12 opens, and the spring 11 pops out. Then, the metal panel 5 in the panel supporting system 4 pops out quickly under the action of the high-pressure gas storage tank 6. At this time, the spring 11 will act on the center position of the metal panel 5.

[0025] When the rigid hydraulic anti-seismic system 10 is turned on, the hydraulic solenoid control valve 9 opens, and the hydraulic oil is injected into the hydraulic head 8. Then, the metal panel 5 in the panel bearing system 4 pops out quickly under the action of the high-pressure gas storage tank 6. At this time, the hydraulic head 8 will act on the center position of the metal panel 5.

[0026] When the earthquake condition returns to normal, the rigid hydraulic anti-seismic system 10 and the flexible spring anti-seismic system 13 should be gradually withdrawn to ensure that the surrounding rock does not suddenly break. The above is a preferred embodiment of the present invention. If modifications and improvements are made using relevant principles in future uses, they are all within the scope of protection of the present invention.

[0027] The above is a preferred embodiment of the present invention. If modifications and improvements are made using relevant principles in future uses, they are all within the scope of protection of the present invention.

Claims

1. A seismic resistance device and method for underground caverns, characterized in that: It includes wave velocity and support monitoring system, seismic control system, flexible spring seismic system, rigid hydraulic seismic system and panel bearing system.

2. The underground cavern seismic resistance device and method according to claim 1, characterized in that: Numerical calculation methods should be fully utilized to arrange the underground cavern seismic-resistant equipment proposed in the present invention in areas that are susceptible to earthquake damage as indicated by numerical calculations.

3. The underground cavern seismic resistance device and method according to claim 1, characterized in that: It should be permanently arranged in areas susceptible to earthquake damage.

4. The wave velocity and support monitoring system according to claim 1, characterized in that: In addition to monitoring the velocity and direction of seismic waves entering the cave, it can also monitor the damage of the existing supporting structures in the cave under the action of seismic waves.

5. The wave velocity and support monitoring system according to claim 1, characterized in that: The entry wave velocity and support structure damage monitoring data can be comprehensively utilized to carry out analysis and determine whether to activate the underground cavern seismic resistance system.

6. The wave velocity and support monitoring system according to claim 1, characterized in that: The collected data is quickly transmitted to the seismic control system to determine whether the seismic control system activation threshold is reached.

7. The seismic control system according to claim 1, characterized in that: It is used to intelligently judge whether to turn on the anti-seismic equipment and the mode of turning on the anti-seismic equipment, namely, the flexible spring anti-seismic system and the rigid hydraulic anti-seismic system.

8. The flexible spring anti-seismic system according to claim 1, characterized in that: Used for seismic protection of underground caverns that have been identified as low-intensity by the seismic resistance system.

9. The flexible spring anti-seismic system according to claim 1, characterized in that: The number and specifications of the arranged springs are determined by the kinetic energy and elastic energy E=1 / 2kx² generated by low-intensity earthquakes on the surrounding rock, where the elastic energy E should basically offset the kinetic energy generated by the surrounding rock, k is the elastic coefficient, and x is the deformation.

10. The flexible spring anti-seismic system according to claim 1, characterized in that: The spring is opened through an electromagnetic control system, mainly for seismic support with lower intensity and less potential damage to the surrounding rock. The support force provided by the spring will be transmitted to the surrounding rock through the panel bearing system.

11. The rigid hydraulic anti-seismic system according to claim 1, characterized in that: The hydraulic valve is opened through an electromagnetic control system, mainly for seismic support with high intensity and potential damage to the surrounding rock. The support force provided by the hydraulic system will be transmitted to the surrounding rock through the panel bearing system.

12. The flexible spring anti-seismic system and the rigid hydraulic anti-seismic system according to claims 10 and 11, characterized in that: The stabilizer will be fixed to the cave floor to provide the reaction force required for earthquake resistance.

13. The panel carrying system according to claim 1, characterized in that: It is made of high-strength metal panels, and the thickness of the metal panels should not be less than 10cm.

14. The panel carrying system according to claim 1, characterized in that: After receiving the earthquake resistance command, it can quickly pop out along the track and stick close to the surrounding rock that needs support.

15. The panel bearing system track according to claim 14, characterized in that: It is arranged parallel to the axis of the cavern, and the difference between its elevation and the elevation of the bottom plate is no more than 10cm.

16. The panel carrying system according to claim 14, characterized in that: Its opening and closing is controlled by a solenoid valve. Before opening, the panel is placed in a high-pressure storage chamber. When the solenoid valve is opened, the high-pressure gas quickly ejects the panel along the track to meet the rapid requirements of earthquake resistance.

17. The high pressure storage chamber according to claim 16, characterized in that: The high-pressure storage chamber should have good thermal insulation and heat preservation properties so that the gas stored therein can maintain a stable high-pressure state for a long time.

18. The high pressure storage chamber according to claim 16, characterized in that: The gas should be an inert gas, preferably nitrogen.

19. The high pressure storage chamber according to claim 16, characterized in that: High-pressure gas filling and discharging ports should be set.

20. The panel carrying system according to claim 1, characterized in that: Under normal working conditions, it is in an independent separation state with the flexible spring seismic anti-vibration system and the rigid hydraulic seismic anti-vibration system. When the seismic anti-vibration equipment needs to be opened due to earthquake, it can be combined with the seismic anti-vibration equipment through springs or hydraulic supports.

21. The panel carrying system according to claim 20, characterized in that: The high-pressure gas pressure should be set according to the position of the spring or hydraulic support, the panel mass, the pop-up speed and the pop-up displacement, so as to ensure that the spring or hydraulic support can be positively pressed on the panel without forming a biased state.

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