Tunnel surrounding rock disturbance blasting monitoring device

Abstract

The utility model provides a tunnel surrounding rock disturbance blasting monitoring device which comprises a fixing bottom plate, a fastening mechanism, a sensor body and a fixing mechanism, the fixing bottom plate is reliably fixed on the tunnel surrounding rock through an anchoring screw rod and a nut, and the sensor body is arranged on one side, away from the surrounding rock, of the fixing bottom plate. And pressing and fixing are achieved through the pressing plate and the elastic tension piece. Compared with a gypsum fixing mode in the prior art, the anchoring screw and the nut are adopted to replace gypsum for bonding and fixing, fixing is more reliable, influences of uncertain factors such as gypsum proportion, solidification time and gypsum thickness are eliminated, and obtaining of more accurate detection data is facilitated. In the next monitoring process, only the pressing plate and the elastic tension piece need to be used for fixing the sensor body on the fixing bottom plate again, gypsum cannot be attached to the sensor body, the cleaning step is omitted, and use is easier and more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of blasting monitoring, and particularly relates to a blasting monitoring device for tunnel surrounding rock disturbance. Background Art

[0002] When a tunnel is excavated by blasting, it is inevitable that the blasting will disturb the surrounding rock. In order to ensure the construction safety in the tunnel and the safety of surrounding buildings, it is necessary to monitor the blasting process in real time, and control the blasting operation according to the monitoring results to achieve a reasonable blasting effect.

[0003] When conducting blasting monitoring, the sensor needs to be fixed to the measuring point position as a whole. In the prior art, gypsum is usually used for fixing. Since the firmness is affected by many factors such as the quality of gypsum powder, the ratio with water, and the thickness of gypsum, it is impossible to ensure that the properties of the gypsum produced each time are the same. Moreover, with this fixing method, gypsum will adhere to the bottom of the sensor. When it is necessary to conduct multiple tests at the same position at different times, installation, disassembly, and cleaning of gypsum are required each time, which is time-consuming and laborious. Summary of the Utility Model

[0004] The utility model provides a blasting monitoring device for tunnel surrounding rock disturbance, aiming to solve the problems in the prior art that there are many uncertain factors brought by gypsum when using gypsum to fix the sensor, and it is time-consuming and laborious to clean the gypsum during multiple tests.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a blasting monitoring device for tunnel surrounding rock disturbance, including:

[0006] A fixed bottom plate, which is provided with a plurality of fixing holes along its circumferential direction, and a plurality of first connecting parts are arranged along the axis of the fixed bottom plate;

[0007] A plurality of fastening mechanisms, corresponding to the fixing holes one by one. Each fastening mechanism includes an anchor screw passing through the corresponding fixing hole and a nut threadedly engaged with the anchor screw. The nut is arranged above the fixed bottom plate;

[0008] A sensor body, which is arranged above the fixed bottom plate and within the area enclosed by the plurality of first connecting bodies; and

[0009] A fixing mechanism, including a pressing plate and a plurality of elastic tension members. The pressing plate is arranged on the sensor body. The pressing plate is provided with a plurality of second connecting parts along its circumferential direction, and the second connecting parts correspond to the first connecting parts one by one. The elastic tension members are detachably connected to the corresponding first connecting parts and second connecting parts and are configured with a pre-tightening tension.

[0010] In a possible implementation, the fixed bottom plate is a square plate, and the plurality of fixed holes are distributed in a rectangular array.

[0011] In a possible implementation, the first connecting portion and the fixed holes are alternately arranged on the fixed bottom plate.

[0012] In a possible implementation, the first connecting portion is a pull ring, and the pull ring includes a connecting portion and a pulling portion. The connecting portion is threadedly connected to the fixed bottom plate.

[0013] In a possible implementation, the fastening mechanism further includes a lock washer, and the lock washer is sleeved on the anchor screw and is located between the fixed bottom plate and the nut.

[0014] In a possible implementation, the pressing plate is provided with a plurality of connecting holes along its circumferential direction. The connecting holes penetrate through the thickness direction of the pressing plate, and the connecting holes form the second connecting portion.

[0015] In a possible implementation, the fixed bottom plate is provided with an avoidance hole penetrating through its thickness direction. The tunnel surrounding rock disturbance blasting monitoring device further includes a support member. The support member includes a drill rod and a support plate connected to the top end of the drill rod. The drill rod penetrates through the avoidance hole, and the support plate covers above the avoidance hole and abuts against the upper surface of the fixed bottom plate. The sensor body is arranged on the upper surface of the support plate.

[0016] In a possible implementation, the fixed bottom plate is provided with a plurality of positioning protrusions around the circumference of the avoidance hole, and the support plate is provided with positioning holes adapted to the positioning protrusions.

[0017] In a possible implementation, the tunnel surrounding rock disturbance blasting monitoring device further includes a protective housing. The protective housing covers above the fixed bottom plate and is detachably connected to the fixed bottom plate. The sensor body is accommodated in the protective housing.

[0018] In a possible implementation, a magnet block is fixedly provided at the bottom of the protective housing.

[0019] Compared with the prior art, the beneficial effects of the tunnel surrounding rock disturbance blasting monitoring device provided by the present utility model are:

[0020] The tunnel surrounding rock disturbance blasting monitoring device provided by the utility model comprises a fixed base plate, a fastening mechanism, a sensor body and a fixing mechanism. The fixed base plate is reliably fixed on the tunnel surrounding rock by anchoring screws and nuts. The sensor body is arranged on the side of the fixed base plate away from the surrounding rock, and is pressed and fixed by a pressure plate and an elastic tension piece. Compared with the method of fixing with gypsum in the prior art, on the one hand, the fixing is more reliable by using anchoring screws and nuts instead of gypsum bonding and fixing, and the influence of uncertain factors such as gypsum ratio, solidification time, and gypsum thickness is eliminated, which helps to obtain more accurate detection data. On the other hand, the sensor body is detachably fixed on the fixed base plate by a pressure plate and an elastic tension piece, which is convenient for installation and disassembly. When it is necessary to monitor the same position multiple times, in the "gap period" between two monitorings, in order to avoid damage or loss of the sensor body, the sensor body can be removed and taken away. When performing the next monitoring, it is only necessary to use a pressure plate and an elastic tension piece to fix the sensor body on the fixed base plate again. The sensor body will not adhere to gypsum, eliminating the cleaning step, and is simpler and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An explosion schematic diagram of a tunnel surrounding rock disturbance blasting monitoring device provided in one embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of a tunnel surrounding rock disturbance blasting monitoring device provided in one embodiment of the utility model Figure 1 ;

[0023] Figure 3 A schematic diagram of the structure of a tunnel surrounding rock disturbance blasting monitoring device provided in one embodiment of the utility model Figure 2 ;

[0024] Figure 4 for Figure 3 Cross-sectional view along the AA direction.

[0025] Description of reference numerals:

[0026] 1. Tunnel surrounding rock disturbance blasting monitoring device; 10. Fixed bottom plate; 11. Fixed hole; 12. Pull ring; 13. Avoidance hole; 14. Positioning protrusion; 20. Fastening mechanism; 21. Anchor screw; 22. Nut; 23. Anti-loosening washer; 30. Sensor body; 40. Fixed mechanism; 41. Pressing plate; 411. Connecting hole; 42. Elastic tension member; 50. Support member; 51. Drill rod; 52. Support plate; 521. Positioning hole; 60. Protective shell; 61. Magnet block; DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] It should be noted that when an element is referred to as "fixed to", "fixed", "fixedly arranged on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to", "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as "arranged on", "arranged on" another element, it can be directly on the other element or there may also be an intermediate element. "Multiple" means two or more quantities. "At least one" means one or more quantities. "Several" means one or more quantities.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs.

[0030] Please refer to Figures 1 to 4 together, and the tunnel surrounding rock disturbance blasting monitoring device 1 provided by the embodiment of the present utility model will be described below.

[0031] Please refer to Figures 1 to 4 As shown in the figure, the embodiment of the present utility model provides a tunnel surrounding rock disturbance blasting monitoring device 1, including a fixed bottom plate 10, a fastening mechanism 20, a sensor body 30 and a fixing mechanism 40. The fixed bottom plate 10 is provided with a plurality of fixing holes 11 along its circumferential direction, and the fixed bottom plate 10 is provided with a plurality of first connecting parts along its axis; a plurality of fastening mechanisms 20 correspond to the fixing holes 11 one by one. The fastening mechanism 20 includes an anchor screw 21 passing through the corresponding fixing hole 11 and a nut 22 threadedly engaged with the anchor screw 21. The nut 22 is arranged above the fixed bottom plate 10; the sensor body 30 is arranged above the fixed bottom plate 10 and is located within the area enclosed by the plurality of first connecting bodies; the fixing mechanism 40 includes a pressing plate 41 and a plurality of elastic tension members 42. The pressing plate 41 is arranged on the sensor body 30. The pressing plate 41 is provided with a plurality of second connecting parts along its circumferential direction. The second connecting parts correspond to the first connecting parts one by one. The elastic tension members 42 are detachably connected to the corresponding first connecting parts and second connecting parts and are configured with a pre-tightening tension.

[0032] Compared with the prior art, the beneficial effect of the tunnel surrounding rock disturbance blasting monitoring device 1 provided by the embodiment of the present utility model is:

[0033] The tunnel surrounding rock disturbance blasting monitoring device 1 provided by the embodiment of the present utility model includes a fixed bottom plate 10, a fastening mechanism 20, a sensor body 30 and a fixing mechanism 40. The fixed bottom plate 10 is reliably fixed on the tunnel surrounding rock through an anchor screw 21 and a nut 22. The sensor body 30 is arranged on the side of the fixed bottom plate 10 away from the surrounding rock and is tightly fixed through a pressing plate 41 and an elastic tension member 42. Compared with the method of fixing with gypsum in the prior art, on the one hand, using the anchor screw 21 and the nut 22 to replace the gypsum bonding fixation makes the fixation more reliable and eliminates the influence of uncertain factors such as gypsum ratio, setting time, and gypsum thickness, which helps to obtain more accurate detection data. On the other hand, the sensor body 30 is detachably fixed on the fixed bottom plate 10 through the pressing plate 41 and the elastic tension member 42, which is convenient for installation and disassembly. When multiple monitors are required for the same position, during the "idle period" between two monitors, in order to avoid damage or loss of the sensor body 30, the sensor body 30 can be removed and taken away. When conducting the next monitor, it is only necessary to fix the sensor body 30 on the fixed bottom plate 10 again using the pressing plate 41 and the elastic tension member 42. The sensor body 30 will not adhere to gypsum, saving the cleaning step and making it simpler and more convenient to use.

[0034] In the embodiment of the present utility model, the fixed bottom plate 10 is made of a steel plate, a cast iron plate or an alloy plate of other materials, as long as it has sufficient structural strength and stiffness. The fixed bottom plate 10 can be square, circular, hexagonal or other shapes. A plurality of fixing holes 11 are provided in the circumferential direction of the fixed bottom plate 10, and the fixing holes 11 are used for passing the anchor screw 21. During installation, drill holes at the installation position in advance, clean the surface gravel and floating soil, and then place the fixed bottom plate 10 at the installation position. The anchor screw 21 is a double-headed screw. One end of the anchor screw 21 extends into the hole of the tunnel surrounding rock, and the other end cooperates with the nut 22, thereby firmly fixing the fixed bottom plate 10 at the installation position. The anchor screw 21 is a disposable part, and a new anchor screw 21 needs to be replaced when installing at the next position. The anchor screw 21 and the nut 22 can directly select suitable types and specifications of products on the market.

[0035] The sensor body 30 is an existing blasting vibration meter on the market, which is used for on-site collection of blasting vibration waves, mechanical vibrations and various impact signals. This instrument is suitable for vibration and blasting measurement and detection projects, and is mainly used for recording vibration data collected at the blasting site. There is no limit to the specific specifications and models of the sensor body 30, and users can select according to their own needs. It should be noted that during installation, the installation angle of the sensor body 30 needs to be adjusted to ensure that its Z-axis is vertical, so as to ensure the accuracy of the measurement data.

[0036] The fixing mechanism 40 includes a pressure plate 41 and an elastic tension member 42. When in use, the sensor body 30 is placed on the fixed base plate 10, and then the pressure plate 41 is placed on the side of the sensor body 30 away from the fixed base plate 10. Finally, the elastic tension member 42 is connected between the first connecting part and the second connecting part. The elastic tension member 42 accumulates tension, so that the pressure plate 41 applies a clamping force perpendicular to the fixed base plate 10 to the sensor body 30, thereby fixing the sensor body 30 on the fixed base plate 10.

[0037] The embodiment of the utility model adopts a pressing and fixing method of a pressing plate 41, which is convenient for installation and removal compared with the existing plaster fixing or glue fixing, and also saves the subsequent cleaning operation. The pressing plate 41 can be made of a metal plate or other plate with relatively high rigidity. The elastic tension member 42 can be a spring, an elastic rubber strip, etc.

[0038] See also Figures 1 to 3 In some possible embodiments, the fixed base plate 10 is a square plate, the plurality of fixing holes 11 are distributed in a rectangular array, and the first connecting portions and the fixing holes 11 are alternately arranged on the fixed base plate 10 .

[0039] See also Figures 1 to 4 In some possible embodiments, the first connection part is a pull ring 12, the pull ring 12 includes a connection part and a pulling part, the connection part is threadedly connected to the fixed bottom plate 10, and the pressing plate 41 is provided with a plurality of connection holes 411 along its circumference, the connection holes 411 pass through the thickness direction of the pressing plate 41, and the connection holes 411 form the second connection part. In order to facilitate connection, hooks are provided at both ends of the spring, one of which is connected to the pull ring 12, and the other hook is connected to the pressing plate 41.

[0040] See also Figures 1 to 4 In some possible embodiments, the fastening mechanism 20 further includes an anti-loosening washer 23, which is sleeved on the anchor screw 21 and located between the fixing base plate 10 and the nut 22, and is used to lock and fix the nut 22 to prevent the nut 22 from loosening. The anti-loosening washer 23 can directly select products with suitable specifications available on the market.

[0041] See also Figures 1 to 4 In some possible embodiments, the fixed bottom plate 10 is provided with an avoidance hole 13 that runs through the fixed bottom plate 10 in the thickness direction thereof. The tunnel surrounding rock disturbance blasting monitoring device 1 further includes a support member 50, the support member 50 includes a drill rod 51 and a support plate 52 connected to the top of the drill rod 51, the drill rod 51 is passed through the avoidance hole 13, the support plate 52 is covered above the avoidance hole 13 and abuts against the upper surface of the fixed bottom plate 10, and the sensor body 30 is disposed on the upper surface of the support plate 52.

[0042] In this embodiment, the support member 50 includes a drill rod 51 and a support plate 52. The drill rod 51 is inserted into the rock or soil layer at the test point to a certain depth. The drill rod 51 and the support plate 52 are made of materials with relatively high rigidity (such as stainless steel, copper alloy, etc.), and can transmit vibrations to the sensor body 30 through the support plate 52 to improve the accuracy of blasting vibration detection.

[0043] Please refer to Figure 1 and Figure 2 , in order to improve the installation accuracy of the support plate 52, the fixed base plate 10 is provided with a plurality of positioning protrusions 14 around the circumferential direction of the avoidance hole 13. The support plate 52 is provided with positioning holes 521 adapted to the positioning protrusions 14. The shape and size of the positioning holes 521 are adapted to the positioning protrusions 14, and can be square, circular and other shapes.

[0044] Please refer to Figure 1 , in order to prevent the crushed stones generated during blasting from colliding with the sensor body 30, the tunnel surrounding rock disturbance blasting monitoring device 1 further includes a protective housing 60. The protective housing 60 is disposed above the fixed base plate 10 and is detachably connected to the fixed base plate 10. The sensor body 30 is accommodated in the protective housing 60.

[0045] The protective housing 60 can be detachably fixed to the fixed base plate 10 by means of bolt connection, tie bundling, magnetic attraction fixation, etc. When magnetic attraction fixation is adopted, a magnet block 61 is fixedly provided at the bottom of the protective housing 60, and the fixed base plate 10 is made of an iron plate.

[0046] It can be understood that the various parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of the various combined embodiments will not be elaborated here. After this explanation, it can be considered that the specification of the present utility model has recorded the various combined embodiments and can support different combined embodiments.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A monitoring device for tunnel surrounding rock disturbance blasting, characterized in that, Including: A fixed bottom plate (10) is provided with a plurality of fixing holes (11) along its circumferential direction, and the fixed bottom plate (10) is provided with a plurality of first connecting parts along its axis; A plurality of fastening mechanisms (20), corresponding to the fixing holes (11) one by one. The fastening mechanism (20) includes an anchor screw (21) passing through the corresponding fixing hole (11), and a nut (22) threadedly engaged with the anchor screw (21). The nut (22) is disposed above the fixed bottom plate (10); A sensor body (30) is disposed above the fixed bottom plate (10) and within the area enclosed by the plurality of first connecting bodies; and A fixing mechanism (40) includes a pressing plate (41) and a plurality of elastic tension members (42). The pressing plate (41) is disposed on the sensor body (30). The pressing plate (41) is provided with a plurality of second connecting parts along its circumferential direction, and the second connecting parts correspond to the first connecting parts one by one. The elastic tension members (42) are detachably connected to the corresponding first connecting parts and second connecting parts and are configured with a pre-tightening tension.

2. The tunnel surrounding rock disturbance blasting monitoring device according to claim 1, characterized in that, The fixed bottom plate (10) is a square plate, and the plurality of fixing holes (11) are arranged in a rectangular array.

3. The tunnel surrounding rock disturbance blasting monitoring device according to claim 2, characterized in that, The first connecting parts and the fixing holes (11) are alternately disposed on the fixed bottom plate (10).

4. The tunnel surrounding rock disturbance blasting monitoring device according to claim 1, characterized in that, The first connecting part is a pull ring (12), and the pull ring (12) includes a connecting part and a pulling part. The connecting part is threadedly connected to the fixed bottom plate (10).

5. The tunnel surrounding rock disturbance blasting monitoring device according to claim 1, characterized in that The fastening mechanism (20) further includes a lock washer (23), and the lock washer (23) is sleeved on the anchor screw (21) and is located between the fixed bottom plate (10) and the nut (22).

6. The tunnel surrounding rock disturbance blasting monitoring device according to claim 1, characterized in that, The pressing plate (41) is provided with a plurality of connecting holes (411) along its circumferential direction. The connecting holes (411) penetrate through the thickness direction of the pressing plate (41), and the connecting holes (411) form the second connecting parts.

7. The tunnel surrounding rock disturbance blasting monitoring device according to claim 1, characterized in that The fixed bottom plate (10) is provided with a relief hole (13) penetrating through its thickness direction. The tunnel surrounding rock disturbance blasting monitoring device further includes a support member (50). The support member (50) includes a drill rod (51) and a support plate (52) connected to the top end of the drill rod (51). The drill rod (51) passes through the relief hole (13), and the support plate (52) covers the upper part of the relief hole (13) and abuts against the upper surface of the fixed bottom plate (10). The sensor body (30) is disposed on the upper surface of the support plate (52).

8. The tunnel surrounding rock disturbance blasting monitoring device according to claim 7, characterized in that, The fixed bottom plate (10) is provided with a plurality of positioning protrusions (14) around the circumferential direction of the relief hole (13), and the support plate (52) is provided with positioning holes (521) adapted to the positioning protrusions (14).

9. The tunnel surrounding rock disturbance blasting monitoring device according to claim 1, characterized in that, The tunnel surrounding rock disturbance blasting monitoring device further includes a protective housing (60). The protective housing (60) covers the upper part of the fixed bottom plate (10) and is detachably connected to the fixed bottom plate (10). The sensor body (30) is accommodated in the protective housing (60).

10. The tunnel surrounding rock disturbance blasting monitoring device according to claim 9, characterized in that A magnet block (61) is fixedly provided at the bottom of the protective housing (60).

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