Monitoring device for jointed rock mass blasting stress waves

Abstract

The utility model relates to the technical field of geotechnical engineering and blasting stress monitoring, and discloses a monitoring device for jointed rock blasting stress waves, which comprises a bag, a stress wave sensor is arranged in the bag, a reinforcing component is arranged on the surface of the stress wave sensor, a lead is fixedly arranged at one end of the stress wave sensor, and the other end of the stress wave sensor is fixedly connected with the reinforcing component. A rubber sleeve is fixedly arranged at one end of the bag, a flat plate is bonded to one side of the rubber sleeve through an adhesive, the middle of the flat plate is fixedly connected with a wire, and a catheter is fixedly arranged on one side of the flat plate; the stress wave sensor is fixed in the reinforcing assembly, so that the strength of the stress wave sensor is improved, the stress wave sensor can be protected, the direct impact of blasting high-pressure impact waves and broken stones can be effectively resisted, and the field survival rate is greatly improved; and the sensor and the irregular drilling rock wall can be ensured to realize gapless tight coupling.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering and blasting stress monitoring technology, specifically a monitoring device for blasting stress waves in jointed rock masses. Background Technology

[0002] In blasting operations for geotechnical engineering projects such as mining, water conservancy and hydropower, and transportation tunnels, the propagation pattern of stress waves generated by blasting in the rock mass directly affects the blasting effect and the stability of the surrounding rock. Various joints, fissures, and other structural surfaces are widely distributed within the rock mass. These surfaces reflect, transmit, and scatter stress waves, significantly altering their propagation characteristics and potentially leading to problems such as over-excavation, under-excavation, fissure expansion, and slope instability.

[0003] Currently, the monitoring of blasting vibration effects mostly uses surface vibration velocity monitoring. However, this method is difficult to directly reflect the propagation process and interaction mechanism of stress waves in deep jointed rock masses. Existing deep stress wave monitoring devices have simple packaging structures, are easily damaged in high-pressure stress waves and complex geological environments, have low survival rates, and have poor coupling effects between sensors and borehole rock walls, resulting in signal distortion and an inability to accurately record high-frequency stress waves.

[0004] Therefore, there is an urgent need for a stress wave monitoring device that can withstand harsh blasting environments and has good coupling. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a monitoring device for blasting stress waves in jointed rock masses, which has the advantages of being durable and having good coupling effect, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a monitoring device for stress waves in jointed rock mass blasting, comprising a bag, a stress wave sensor inside the bag, a reinforcing component on the surface of the stress wave sensor, a wire fixedly attached to one end of the stress wave sensor, a rubber sleeve fixedly attached to one end of the bag, a flat plate glued to one side of the rubber sleeve by adhesive, a wire fixedly connected to the middle of the flat plate, a conduit fixedly attached to one side of the flat plate, and a wire management component for organizing the wire on the surface of the conduit.

[0007] As a preferred technical solution of this utility model, the reinforcing component includes a high-strength alloy protective shell, which is fixedly connected to the surface of the stress wave sensor. Several stiffeners are fixedly provided on the surface of the high-strength alloy protective shell, and baffles are fixedly provided at both ends of the high-strength alloy protective shell. A through hole is opened in the middle of the baffle.

[0008] As a preferred embodiment of this utility model, a reinforcing end is fixedly provided at the connection between the stress wave sensor and the wire, the reinforcing end is inserted and connected to the through hole of the baffle, and a connector is fixedly provided at one end of the wire.

[0009] As a preferred technical solution of this utility model, the cable management assembly includes a tube clamp and a wire clamp. The tube clamp is engaged with the surface of the conduit, and the wire clamp is engaged with the surface of the conductor. Both the surface of the tube clamp and the surface of the wire clamp have installation openings, and the inner walls of both the tube clamp and the wire clamp are bonded with rubber pads.

[0010] As a preferred embodiment of this utility model, a rubber head is fixedly provided on the other side of the bag, and an exhaust micro-hole is provided in the middle of the rubber head.

[0011] As a preferred embodiment of this utility model, the surface of the flat plate is provided with an input port, and the output end of the conduit is fixedly provided with an installation ring. One side of the installation ring is fixedly connected to one side of the input port by a screw.

[0012] As a preferred embodiment of this utility model, an annular groove is provided on one side of the mounting ring, and a sealing ring is engaged inside the annular groove.

[0013] As a preferred embodiment of this utility model, a threaded hole for screw thread connection is provided on the bottom of one side of the plate, a through-hole for screw insertion is provided on the surface of the mounting ring, and a notch corresponding to the wire is provided on the top of the mounting ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By fixing the stress wave sensor within the reinforcing assembly, the sensor's strength is increased, providing protection and effectively resisting the direct impact of blasting high-pressure shock waves and gravel, greatly improving the survival rate on site. The use of a bag-filled expansion grout ensures a seamless, tight coupling between the sensor and the irregular borehole rock wall, effectively transmitting high-frequency stress wave signals and guaranteeing the authenticity and accuracy of the monitoring data. By placing the assembled stress wave sensor and bag into the borehole at a predetermined depth, particularly on both sides of the joint surface, the transmission and reflection spectral characteristics of the stress wave after passing through the joint surface can be precisely compared and analyzed, providing direct data support for studying the influence of the joint surface on stress wave propagation.

[0016] 2. The conduit facilitates the injection of grout into the bag, the wire ensures the transmission of monitoring data by the stress wave sensor, and the wire management component can bind the wire to the conduit, making it easy to manage the wire and preventing the wire from getting tangled with the conduit. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the bag of this utility model;

[0020] Figure 4 This is a schematic diagram of the stress wave sensor of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the flat plate of this utility model;

[0022] Figure 6 This is a schematic diagram of the cable management component of this utility model.

[0023] In the diagram: 1. Bag; 2. Stress wave sensor; 3. Reinforcing component; 301. High-strength alloy protective shell; 302. Rib plate; 303. Baffle; 304. Through hole; 4. Cable management component; 401. Pipe clamp; 402. Cable clamp; 403. Mounting port; 404. Rubber pad; 5. Reinforcing end; 6. Wire; 7. Flat plate; 8. Rubber sleeve; 9. Conduit; 10. Connector; 11. Inlet; 12. Mounting ring; 13. Notch; 14. Sealing ring; 15. Rubber head; 16. Exhaust micropore. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6A monitoring device for stress waves from blasting in jointed rock masses includes a bag 1, inside which a stress wave sensor 2 is housed. A reinforcing component 3 is provided on the surface of the stress wave sensor 2. A wire 6 is fixed to one end of the stress wave sensor 2, and a rubber sleeve 8 is fixed to one end of the bag 1. A flat plate 7 is adhesively bonded to one side of the rubber sleeve 8. The middle of the flat plate 7 is fixedly connected to the wire 6. A conduit 9 is fixed to one side of the flat plate 7, and a wire management component 4 is provided on the surface of the conduit 9 to organize the wire 6. By fixing the stress wave sensor 2 inside the reinforcing component 3, the strength of the stress wave sensor 2 is improved. It provides protection and can effectively resist the direct impact of blasting high-pressure shock waves and gravel, greatly improving the survival rate on site. The method of filling the bag 1 with expansion grout ensures that the sensor and the irregular borehole rock wall achieve a tight coupling without gaps, effectively transmitting high-frequency stress wave signals and ensuring the authenticity and accuracy of monitoring data. By placing the assembled stress wave sensor 2 and bag 1 into the borehole at a predetermined depth, especially on both sides of the joint surface, the transmission and reflection spectrum characteristics of the stress wave after passing through the joint surface can be accurately compared and analyzed, providing direct data support for studying the influence of the joint surface on stress wave propagation.

[0026] In this embodiment, preferably, the reinforcing component 3 includes a high-strength alloy protective shell 301, which is fixedly connected to the surface of the stress wave sensor 2. A plurality of stiffeners 302 are fixedly provided on the surface of the high-strength alloy protective shell 301. Baffles 303 are fixedly provided at both ends of the high-strength alloy protective shell 301. A through hole 304 is provided in the middle of the baffle 303. A reinforcing end 5 is fixedly provided at the connection between the stress wave sensor 2 and the wire 6. The reinforcing end 5 is inserted and connected to the through hole 304 of the baffle 303. A connector 10 is fixedly provided at one end of the wire 6. The strength of the stress wave sensor 2 is improved by the high-strength alloy protective shell 301, which can provide protection for it and effectively resist the direct impact of blasting high-pressure shock waves and gravel. The stiffeners 302 can strengthen the bonding strength between the high-strength alloy protective shell 301 and the grouting material.

[0027] In this embodiment, preferably, the cable management component 4 includes a tube clamp 401 and a wire clamp 402. The tube clamp 401 is engaged with the surface of the conduit 9, and the wire clamp 402 is engaged with the surface of the wire 6. Both the surface of the tube clamp 401 and the surface of the wire clamp 402 are provided with an installation port 403. The inner wall of the tube clamp 401 and the inner wall of the wire clamp 402 are both bonded with rubber pads 404. By engaging the tube clamp 401 and the wire clamp 402 on the conduit 9 and the wire 6 respectively, the wire 6 can be bound to the conduit 9, which is convenient for organizing the wire 6 and avoids the wire 6 from getting tangled with the conduit 9. The rubber pads 404 can increase the friction between the tube clamp 401 and the wire clamp 402 and the conduit 9 and the wire 6, making it less likely to slip.

[0028] In this embodiment, preferably, a rubber head 15 is fixedly provided on the other side of the bag 1, and an exhaust microhole 16 is provided in the middle of the rubber head 15. The rubber head 15 and the rubber sleeve 8 can prevent the bag 1 from rupturing due to excessive grouting pressure. The exhaust microhole 16 can play the role of venting and can ensure the grouting quality.

[0029] In this embodiment, preferably, the surface of the plate 7 has an inlet 11, and the output end of the conduit 9 is fixedly provided with a mounting ring 12. One side of the mounting ring 12 is fixedly connected to one side of the inlet 11 by a screw. One side of the mounting ring 12 has an annular groove, and a sealing ring 14 is engaged inside the annular groove. The bottom of one side of the plate 7 has a threaded hole for threaded connection with the screw. The surface of the mounting ring 12 has a through hole for screw insertion. The top of the mounting ring 12 has a notch 13 corresponding to the wire 6. The mounting ring 12 can fix the conduit 9. The sealing ring 14 can seal the connection between the mounting ring 12 and the inlet 11. The notch 13 can prevent the wire 6 from interfering with the installation of the mounting ring 12.

[0030] In use, first, open the rubber sleeve 8 and pass it through the reinforcing component 3 on the surface of the stress wave sensor 2, so that the bag 1 is fitted on the reinforcing component 3. Then, use adhesive to bond the opening of the rubber sleeve 8 to the flat plate 7 of the wire 6. Next, snap the sealing ring 14 onto the mounting ring 12 and fix the mounting ring 12 to one side of the input port 11 with screws. Then, snap the tube clamp 401 and the wire clamp 402 of the wire management component 4 onto the conduit 9 and the wire 6 respectively. The wire 6 can be bound to the conduit 9, so the wire 6 can be organized and avoid the wire 6 from getting tangled with the conduit 9. The rubber pad 404 can increase the friction between the tube clamp 401 and the wire clamp 402 and the conduit 9 and the wire 6, making it less likely to slip. Finally, put the assembled stress wave sensor 2 and bag 1 into the predetermined depth in the drill hole.

[0031] After the stress wave sensor 2 and the bladder 1 are installed, grout is injected through the connector 10 and the conduit 9. The grout can enter the bladder 1. The rubber head 15 and the rubber sleeve 8 can prevent the bladder 1 from rupturing due to excessive grouting pressure. The venting microhole 16 can play a role in venting and can ensure the grouting quality. After the grout solidifies, the setting of the stiffening plate 302 can strengthen the bonding strength between the high-strength alloy protective shell 301 and the grout. The grout can fill the gaps and ensure that the stress wave sensor 2 and the irregular borehole rock wall achieve a tight coupling without gaps, effectively transmitting high-frequency stress wave signals and ensuring the authenticity and accuracy of monitoring data. The high-strength alloy protective shell 301 improves the strength of the stress wave sensor 2 and can protect it, effectively resisting the direct impact of blasting high-pressure shock waves and gravel.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A monitoring device for stress waves during blasting in jointed rock mass, comprising a bag (1), characterized in that: The bag (1) is equipped with a stress wave sensor (2) inside. The surface of the stress wave sensor (2) is equipped with a reinforcing component (3). One end of the stress wave sensor (2) is fixedly equipped with a wire (6). One end of the bag (1) is fixedly equipped with a rubber sleeve (8). A plate (7) is glued to one side of the rubber sleeve (8) by an adhesive. The middle part of the plate (7) is fixedly connected to the wire (6). A conduit (9) is fixedly equipped on one side of the plate (7). The surface of the conduit (9) is equipped with a wire management component (4) for organizing the wire (6).

2. The monitoring device for blasting stress waves in jointed rock mass according to claim 1, characterized in that: The reinforcing component (3) includes a high-strength alloy protective shell (301), which is fixedly connected to the surface of the stress wave sensor (2). Several stiffeners (302) are fixedly provided on the surface of the high-strength alloy protective shell (301). Baffles (303) are fixedly provided at both ends of the high-strength alloy protective shell (301), and a through hole (304) is opened in the middle of the baffle (303).

3. The monitoring device for stress waves during blasting of jointed rock mass according to claim 2, characterized in that: The stress wave sensor (2) is fixedly provided with a reinforcing end (5) at the connection between it and the wire (6). The reinforcing end (5) is inserted and connected to the through hole (304) of the baffle (303). One end of the wire (6) is fixedly provided with a connector (10).

4. The monitoring device for blasting stress waves in jointed rock mass according to claim 1, characterized in that: The cable management assembly (4) includes a pipe clamp (401) and a wire clamp (402). The pipe clamp (401) is engaged with the surface of the conduit (9), and the wire clamp (402) is engaged with the surface of the wire (6). Both the surface of the pipe clamp (401) and the surface of the wire clamp (402) are provided with an installation port (403). Both the inner wall of the pipe clamp (401) and the inner wall of the wire clamp (402) are bonded with rubber pads (404).

5. The monitoring device for stress waves during blasting of jointed rock mass according to claim 1, characterized in that: A rubber head (15) is fixedly provided on the other side of the bag (1), and an exhaust micro-hole (16) is opened in the middle of the rubber head (15).

6. The monitoring device for stress waves during blasting of jointed rock mass according to claim 1, characterized in that: The surface of the plate (7) is provided with an inlet (11), and the output end of the conduit (9) is fixedly provided with an installation ring (12). One side of the installation ring (12) is fixedly connected to one side of the inlet (11) by screws.

7. The monitoring device for stress waves during blasting of jointed rock mass according to claim 6, characterized in that: The mounting ring (12) has an annular groove on one side, and a sealing ring (14) is engaged inside the annular groove.

8. The monitoring device for stress waves in blasting jointed rock mass according to claim 6, characterized in that: The bottom of one side of the plate (7) is provided with a threaded hole for screw thread connection, the surface of the mounting ring (12) is provided with a through hole for screw insertion connection, and the top of the mounting ring (12) is provided with a notch (13) corresponding to the wire (6).

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