A method and system for predicting internal blasting vibration of surrounding rock in deep-buried tunnels

Abstract

The present invention provides a method and system for predicting internal blasting vibration of surrounding rock in deep-buried tunnels, which relates to the technical field of tunnel engineering blasting. The method includes horizontally drilling a plurality of test holes from the prior tunnel into the surrounding rock, and successively installing blasting vibration sensors at the bottom of each test hole by using a push-pull device; blasting the subsequent tunnel, and acquiring the vibration data of the test holes collected by the vibration sensors; fitting a first blasting vibration velocity prediction model in front of the heading face by using the vibration data of the test holes in front of the heading face and the distance from the blast center; calculating the actual distance from the blast center of the test holes behind the heading face; and fitting the Sadovskii formula by using the actual distance from the blast center of the test holes behind the heading face and the vibration data to obtain a second blasting vibration velocity prediction model behind the heading face. The present invention uses a push-pull device to solve the problems of internal vibration monitoring of surrounding rock in deep-buried tunnels and the propagation path of blasting stress waves in complex environments, and improves the accuracy of the blasting vibration prediction formula behind the heading face.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel blasting, and in particular, to a method and system for predicting internal blasting vibration of surrounding rock in deep-buried tunnels. Background Art

[0002] Deep engineering is usually located in extremely complex engineering geological environments such as high in-situ stress and strong tectonic activities. These environmental factors make it extremely easy to induce disasters such as rock mass rupture, rib spalling, large deformation, and rock burst during the engineering construction process. Especially in tunnels constructed by the drill-and-blast method, blasting disturbances will accelerate the occurrence of these disasters. Therefore, studying the principles of various disasters induced by blasting shock has become a current research hotspot. However, the existing technologies have limitations in monitoring blasting stress waves. When blasting stress waves encounter an air medium, diffraction will occur, and the current surface test method of surrounding rock cannot effectively solve this problem, thus unable to master the propagation characteristics of blasting stress waves in complex geological environments. Summary of the Invention

[0003] The purpose of the present invention is to provide a method, device, equipment, and readable storage medium for predicting internal blasting vibration of surrounding rock in deep-buried tunnels to improve the above problems. To achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0004] In a first aspect, the present application provides a method for predicting internal blasting vibration of surrounding rock in deep-buried tunnels, including:

[0005] Horizontally drill a plurality of test holes from the advanced tunnel into the surrounding rock, and successively install blasting vibration sensors at the bottom of each test hole. The plurality of test holes are evenly distributed in front of and behind the heading face with the heading face as the symmetry plane;

[0006] Conduct blasting on the subsequent tunnel, and obtain the vibration data of the test holes collected by the vibration sensors;

[0007] Obtain the distance from the blast center of the test holes in front of the heading face, and use the vibration data and the distance from the blast center of the test holes in front of the heading face to fit the Sadovsky formula to obtain the first blasting vibration velocity prediction model in front of the heading face;

[0008] Obtain the blasting charge of the subsequent tunnel, substitute the vibration data and the blasting charge of the test holes behind the heading face into the first blasting vibration velocity prediction model, and calculate the actual distance from the blast center when the blast source propagates to the test holes;

[0009] Use the actual distance from the blast center and the vibration data of the test holes behind the heading face to fit the Sadovsky formula to obtain the second blasting vibration velocity prediction model behind the heading face.

[0010] In a second aspect, the present application also provides a system for predicting internal blasting vibration of surrounding rock in deep-buried tunnels, including:

[0011] Arrangement module: Horizontally drill a plurality of test holes into the surrounding rock from the advanced tunnel, and successively install blasting vibration sensors at the bottoms of each test hole. The plurality of test holes are evenly distributed in front of and behind the heading face with the heading face as the symmetry plane;

[0012] Acquisition module: Blast the subsequent tunnel, and acquire the vibration data of the test holes collected by the vibration sensors;

[0013] First fitting module: Obtain the distance from the blast center of the test holes in front of the heading face, and fit the Sadovsky formula using the vibration data and the distance from the blast center of the test holes in front of the heading face to obtain the first blasting vibration velocity prediction model in front of the heading face;

[0014] First calculation module: Calculate the actual distance from the blast center of the test holes behind the heading face according to the first blasting vibration velocity prediction model and the vibration data of the test holes behind the heading face;

[0015] Second fitting module: Fit the Sadovsky formula using the actual distance from the blast center and the vibration data of the test holes behind the heading face to obtain the second blasting vibration velocity prediction model behind the heading face.

[0016] Thirdly, the present application also provides a blasting vibration prediction device inside the surrounding rock of a deep-buried tunnel, including:

[0017] A memory for storing a computer program;

[0018] A processor for implementing the steps of the blasting vibration prediction method inside the surrounding rock of the deep-buried tunnel when executing the computer program.

[0019] Fourthly, the present application also provides a readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned blasting vibration prediction method based on the inside of the surrounding rock of the deep-buried tunnel are implemented.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention horizontally drills a plurality of test holes into the surrounding rock from the advanced tunnel and installs an improved blasting vibration sensor at the bottom of the hole. The ingenious design of the blasting vibration sensor ensures its stability during the blasting process and the accuracy of data acquisition. The installation and fixation process is simple and fast, reducing the construction cost and the working intensity of personnel, realizing all-round and high-precision monitoring of blasting vibration, and being able to effectively capture the propagation characteristics of blasting stress waves in different directions, providing accurate data support for vibration prediction.

[0022] 2. The present invention utilizes the first blasting vibration velocity prediction model obtained by fitting the vibration data of the test holes in front of the heading face and the distance from the blast center, and further fits the second blasting vibration velocity prediction model calculated based on the first blasting vibration velocity prediction model and the data of the rear test holes. It can more accurately predict the propagation of blasting vibration in the surrounding rock at the rear, providing an important reference for the safety protection of the rear construction and the optimization design of blasting.

[0023] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will become obvious from the specification, or can be understood by implementing the embodiments of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic flow chart of the method for predicting internal blasting vibration of surrounding rock in a deep-buried tunnel described in the embodiments of the present invention;

[0026] Figure 2 It is a top view of the tunnel described in the embodiments of the present invention;

[0027] Figure 3 It is a cross-sectional view of the tunnel described in the embodiments of the present invention;

[0028] Figure 4 It is a cross-sectional view of the blasting vibration sensor described in the embodiments of the present invention;

[0029] Figure 5 It is a schematic diagram of the telescopic rod described in the embodiments of the present invention;

[0030] Figure 6 It is a schematic diagram of the push-pull rod described in the embodiments of the present invention;

[0031] Figure 7 It is a schematic diagram of the overall structure of the blasting vibration sensor described in the embodiments of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the towing rope described in the embodiments of the present invention;

[0033] Figure 9Schematic structural diagram of the internal blasting vibration prediction system for surrounding rocks of deep-buried tunnels in the embodiments of the present invention;

[0034] Figure 10 Schematic structural diagram of the internal blasting vibration prediction device for surrounding rocks of deep-buried tunnels in the embodiments of the present invention.

[0035] Labels in the figure:

[0036] 1. Sensor body; 2. Accommodating box; 21. Through hole; 3. Blocking layer; 4. Pushing and pulling device, 41 Support rod, 411. First rod; 412. Second rod; 413. Third rod; 414. Fourth rod; 415. Fifth rod; 416. Sixth rod; 417. Fixed block; 42. Push-pull rod; 43. Spring; 44. Slide block; 45. Button; 46. End handle; 461. Spring piece; 47. Bayonet; 48. Rod cap; 49. Pulley block; 491. Fixed pulley; 492. Movable pulley; 493. Traction rope; 494. Hook; 495. Plastic hard tube;

[0037] 800. Internal blasting vibration prediction device for surrounding rocks of deep-buried tunnels; 801. Processor; 802. Memory; 803. Multimedia component; 804. I / O interface; 805. Communication component. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used for differential description and cannot be construed as indicating or implying relative importance.

[0040] Embodiment 1:

[0041] This embodiment provides a method for predicting internal blasting vibration of surrounding rocks of deep-buried tunnels.

[0042] SeeFigures 1-3 , as shown in the figure, the method includes:

[0043] S1. Horizontally drill a plurality of test holes into the surrounding rock from the advanced tunnel, and successively install blasting vibration sensors at the bottom of each test hole. The plurality of test holes are evenly distributed in front of and behind the heading face with the heading face as the symmetry plane;

[0044] Specifically, the step S1 includes:

[0045] S11. Determine the horizontal height for drilling the test holes on the advanced tunnel wall , and determine the horizontal distance between two adjacent test holes;

[0046] S12. Obtain the drilling depth of the test holes. The drilling depth includes a first depth and a second depth, and the plurality of test holes are drilled alternately according to the first depth and the second depth;

[0047] S13. Drill at least 4 test holes successively along the front of the heading face according to the horizontal height, horizontal distance, and depth. As Figure 2 shown, the test hole numbers in front of the heading face are 3#, 4#, 7#, and 8# respectively. Among them, the drilling depths of the 3# and 4# test holes are the first depth , and the drilling depths of the 7# and 8# test holes are the second depth .

[0048] S14. Using the heading face as the symmetry plane, symmetrically drill the same number of test holes behind the heading face. As shown in the figure, the test hole numbers in front of the heading face are 1#, 2#, 5#, and 6# respectively. Among them, the drilling depths of the 1# and 2# test holes are the first depth , and the drilling depths of the 5# and 6# test holes are the second depth.

[0049] As Figure 4 shown, in this embodiment, the blasting vibration sensor includes:

[0050] A sensor body 1, and the sensor body 1 is located at the upper part of the blasting vibration sensor;

[0051] In this embodiment, the sensor body 1 is an integrated instrument of a large-range blasting vibration sensor and an ISV-613A integrated intelligent vibration measuring instrument. The ISV-613A integrated intelligent vibration measuring instrument itself has a data acquisition system for small-range sensors, and can realize the measurement of vibration velocity under low-disturbance response. The main parameters of the small-range sensors built in the ISV-613A integrated intelligent vibration measuring instrument are: three-axis (X, Y, Z) vibration sensors, the vibration velocity measurement range is 0.008~33 cm / s, the frequency response is 1~1 KHz, and the working temperature is -20~60 °C.

[0052] The parameters of the integrated sensor body 1 are mainly as follows: the blasting vibration velocity test range is 0.01 - 2500 mm / s, the sensitivity is 2 mv / mm / s, the frequency response range is 4 - 3KHZ, the working temperature is -20~80°, and it is a three-axis (X, Y, Z) vibration sensor.

[0053] The sensor body 1 is configured with a program-controlled switching software, which selects the working mode according to the on-site needs. It can not only take into account the vibration monitoring with low disturbance, but also meet the vibration monitoring requirements caused by strong disturbance.

[0054] The working modes mainly include the following two:

[0055] 1) Strong disturbance mode, starting the operation of the large-range sensor.

[0056] 2) Low disturbance mode, starting the operation of the small-range sensor built in the ISV-613A integrated intelligent vibration meter itself.

[0057] Through the program-controlled switching software, the switching between the two working modes can be realized, which can take into account the vibration velocity measurement requirements under different disturbances, and select different modes according to the on-site needs for testing in different environments.

[0058] The accommodating box 2 is located below the blasting vibration sensor. A blocking layer 3 is provided between the accommodating box 2 and the sensor body 1. The accommodating box 2 is provided with a plurality of through holes 21 along the circumferential direction; preferably, the blocking layer 3 is composed of foam and metal gaskets to avoid interference of the pushing and pulling device 4 on the sensor body 1.

[0059] The pushing and pulling device 4 is located inside the accommodating box 2. The top of the pushing and pulling device 4 is fixedly connected to the inner top surface of the accommodating box 2. A plurality of support rods 41 of the pushing and pulling device 4 extend outward along the plurality of through holes 21 to contact the inner wall of the test hole, and the blasting vibration sensor is fixed in the test hole.

[0060] Preferably, as Figure 6 、 Figure 7 shown, the pushing and pulling device 4 includes:

[0061] The push rod 42 is provided with a spring 43 along the vertical direction inside. A slider 44 is sleeved on the outside of the push rod 42 along the circumferential direction. The slider 44 slides radially along the push rod 42. When the slider 44 approaches the end handle 46, the spring 43 is in a compressed state; a button 45 is provided below the push rod.

[0062] The end handle 46 is provided with a bayonet 47 on its side wall. The end handle 46 is fixedly connected to the button 45 through the bayonet 47, and a spring piece 461 is also provided inside the end handle 46;

[0063] A rod cap 48, which is fixed to the top of the push-pull rod 42;

[0064] A pulley block 49, which includes a fixed pulley 491, a movable pulley 492 and a towing rope 493. The fixed pulley 491 is fixed on the rod cap 48. The movable pulley 492 is nested on the outer side of the push-pull rod and moves radially along the push-pull rod 42. One end of the towing rope 493 is sequentially connected to the fixed pulley 491 and the movable pulley 492, and the other end radially passes through the inside of the spring 43 and is connected with a hook 494;

[0065] Preferably, as Figure 8 shown, a plastic hard tube 495 is sleeved outside the towing rope 493. The upper part of the plastic hard tube 495 contacts the bottom of the rod cap 48, and the lower part contacts the upper part of the hook 494, ensuring that the hook 494 connected by the towing rope 493 forms a buckle structure with the spring piece 461. Among them, the length of the plastic hard tube 495 is designed according to the drilling depth of the test hole.

[0066] Preferably, as Figure 5 shown, the support rod 41 includes a first rod 411, a second rod 412, a third rod 413, a fourth rod 414, a fifth rod 415 and a sixth rod 416;

[0067] One end of the first rod 411 is hinged to the rod cap 48, and the other end is hinged to the middle part of the second rod 412;

[0068] One end of the second rod 412 is hinged to one end of the third rod 413, and the other end is connected to one end of the fifth rod 415;

[0069] The other end of the third rod 413 extends out of the through hole 21 of the accommodation box body 2 and is connected with a fixed block 417;

[0070] One end of the fourth rod 414 is connected to the slider 44, and the other end is hinged to the middle part of the first rod 411;

[0071] The other end of the fifth rod 415 is hinged to the middle part of the fourth rod 414;

[0072] One end of the sixth rod 416 is hinged to the end part of the third rod 413, and the other end is hinged to the middle part of the first rod 411;

[0073] A spring is also connected between the end part of the first rod 411 and the middle part of the fourth rod 414;

[0074] In this embodiment, when the slider 44 pushes the support rod 41 upward, the support rod 41 extends outward and pushes the fixing block 417 to fix the blasting vibration sensor in the test hole; when the support rod 41 contracts, the spring uses its contraction force to pull the first rod 411 to retract.

[0075] Based on the above embodiments, the method further includes:

[0076] S2. Blasting the subsequent tunnel and obtaining the vibration data of the test hole collected by the vibration sensor;

[0077] Based on the above embodiments, the method further includes:

[0078] S3. Obtaining the distance from the blast center of the test hole in front of the heading face, and fitting the Sadovskii formula using the vibration data and the distance from the blast center of the test hole in front of the heading face to obtain the first blasting vibration velocity prediction model in front of the heading face;

[0079] Specifically, the Sadovskii formula is:

[0080] ; (1)

[0081] In the formula: represents the vibration velocity; represents the coefficient related to the medium and blasting condition factors; represents the blasting charge; represents the distance from the blast center; represents the vibration attenuation coefficient;

[0082] Obtain the blasting charge of the subsequent tunnel, and respectively fit the Sadovskii formula using the vibration velocity, the distance from the blast center, and the blasting charge of the 3#, 4#, 7#, and 8# test holes to obtain and , and substitute and into the Sadovskii formula to obtain the first blasting vibration velocity prediction model in front of the heading face as:

[0083] ; (2)

[0084] In the formula, , , respectively represent the vibration velocity of the first blasting vibration velocity prediction model, the coefficient related to the medium and blasting condition factors of the first blasting vibration velocity prediction model, and the vibration attenuation coefficient of the first blasting vibration velocity prediction model.

[0085] Based on the above embodiments, the method further includes:

[0086] S4. Obtain the blasting charge of the rear tunnel. Substitute the vibration data and the blasting charge of the test holes behind the tunnel face into the first blasting vibration velocity prediction model to calculate the actual distance from the blast source to the test holes;

[0087] In this embodiment, the vibration velocity and the blasting charge of the 1# and 2# test holes are respectively substituted into the first blasting vibration velocity prediction model to calculate the actual distance from the blast source to the 1# test hole and the actual distance from the blast source to the 2# test hole .

[0088] Based on the above embodiments, the method further includes:

[0089] S5. Fit the Sadovsky formula using the actual distance from the blast source to the test holes behind the tunnel face and the vibration data to obtain the second blasting vibration velocity prediction model behind the tunnel face;

[0090] Specifically, the step S5 includes:

[0091] S51. Obtain the central coordinates of the orifice of the test holes behind the tunnel face ;

[0092] S52. Invert the central coordinates of the bottom of the test holes behind the tunnel face according to the central coordinates of the orifice and the drilling depth : :

[0093] ; (3)

[0094] In the formula, represents the th test hole. Using the above formula, the central coordinates of the bottom of the test holes behind the tunnel face can be inverted. respectively represent the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the orifice, respectively represent the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the bottom.

[0095] S53. Obtain the coordinates of the blast source on the tunnel face , and according to the coordinates of the blast source, the central coordinates of the bottom, and the actual distance from the blast source to the test holes, use the coordinate system inversion method to invert the propagation path of the stress wave to the bottom of the test holes behind the tunnel face;

[0096] Specifically, the propagation path of the stress wave to the 1# test hole calculated using the coordinate system inversion method is:

[0097] ; (4)

[0098] In the formula, Denote the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the surrounding rock on the sidewall of the heading face section that the stress wave passes through before reaching the No. 1 test hole, i.e., the inflection point coordinates. Denote the distance between the blast source and the inflection point. Denote the distance between the inflection point and the No. 1 test hole. Denote the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the blast source;

[0099] Use a total station to scan the contour coordinates on the right side of the heading face of the subsequent tunnel. As Figure 3 shown, summarize the contour scan coordinate points, and through the matlab programming screening algorithm, sequentially use the contour scan coordinate points as substitute them into formula (1) for matching calculation to obtain value;

[0100] Similarly, use the coordinate system inversion method to calculate the propagation path of the stress wave reaching the No. 1 test hole, and obtain the coordinate points of the surrounding rock on the sidewall of the heading face section that the stress wave passes through before reaching the No. 2 test hole , respectively denote the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the coordinate points of the surrounding rock on the sidewall of the heading face section that the stress wave passes through before reaching the No. 2 test hole.

[0101] S54. Based on the propagation path, fit the Sadovsky formula to obtain the second blasting vibration velocity prediction model behind the heading face;

[0102] Specifically, the step S54 includes:

[0103] S541. Obtain the inflection point coordinates on the propagation path;

[0104] Since the inflection point where the stress wave passes through the surrounding rock on the sidewall of the heading face section is a fixed point, but and have errors, so they are two different coordinate points. In this embodiment, the midpoint of the two is used as the inflection point where the stress wave passes through the surrounding rock on the sidewall of the heading face section. Therefore, the inflection point coordinates on the propagation path are:

[0105] ; (5)

[0106] In the formula, respectively denote the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the inflection point on the propagation path.

[0107] S542. Calculate the actual blast center distance of the No. 5 test hole and the actual blast center distance of the No. 6 test hole according to the inflection point coordinates;

[0108] ; (6)

[0109] In the formula, represents the distance between the inflection point and the blast center, represents the distance between the inflection point and the No. 5 test hole. The calculation method of is the same as that of

[0110] S543. Using the propagation distance of stress waves in the surrounding rock, the vibration data of the test holes behind the tunnel face, and the blasting charge to fit the Sadovskii formula, a second blasting vibration velocity prediction model behind the tunnel face is obtained;

[0111] In this embodiment, using the propagation distance, vibration velocity, and blasting charge of the No. 5 and No. 6 test holes to fit the Sadovskii formula, a second blasting vibration velocity prediction model behind the tunnel face is obtained:

[0112] ; (7)

[0113] In the formula, , , respectively represent the vibration velocity of the second blasting vibration velocity prediction model, the coefficient related to the medium and blasting condition factors of the second blasting vibration velocity prediction model, and the vibration attenuation coefficient of the second blasting vibration velocity prediction model.

[0114] It should be noted that in this embodiment, only two test holes are used as an example to fit the second blasting vibration velocity prediction model. In actual operation, the more test holes there are, the higher the accuracy of the fitted model.

[0115] Embodiment 2:

[0116] As Figure 9 shown, this embodiment provides a deep-buried tunnel surrounding rock internal blasting vibration prediction system, and the system includes:

[0117] Arrangement module: Horizontally drill a plurality of test holes from the advanced tunnel into the surrounding rock, and install blasting vibration sensors at the bottom of each test hole in sequence. The plurality of test holes are evenly distributed in front of and behind the tunnel face with the tunnel face as the symmetry plane;

[0118] Acquisition module: Blast the subsequent tunnel, and acquire the vibration data of the test holes collected by the vibration sensors;

[0119] First fitting module: Obtain the blast center distance of the test holes in front of the tunnel face, and use the vibration data and blast center distance of the test holes in front of the tunnel face to fit the Sadovskii formula to obtain the first blasting vibration velocity prediction model in front of the tunnel face;

[0120] The first calculation module: Obtain the blasting charge of the rear tunnel, substitute the vibration data and blasting charge of the test holes behind the tunnel face into the first blasting vibration velocity prediction model, and calculate the actual distance from the blast source to the test holes.

[0121] The second fitting module: Fit the Sadovsky formula using the actual distance from the blast source to the test holes behind the tunnel face and the vibration data, and obtain the second blasting vibration velocity prediction model behind the tunnel face.

[0122] Based on the above embodiments, the layout module includes:

[0123] The first determination unit: Determine the horizontal height for drilling the test holes on the wall of the leading tunnel, and determine the horizontal distance between two adjacent test holes.

[0124] The first acquisition unit: Acquire the drilling depth of the test holes, where the drilling depth includes a first depth and a second depth, and multiple test holes are drilled alternately according to the first depth and the second depth.

[0125] The first layout unit: Drill at least 4 test holes in sequence along the front of the tunnel face according to the horizontal height, horizontal distance, and depth.

[0126] The second layout unit: Using the tunnel face as the symmetry plane, symmetrically drill the same number of test holes behind the tunnel face.

[0127] Based on the above embodiments, the second fitting module includes:

[0128] The third acquisition unit: Acquire the central coordinates of the orifice of the test holes behind the tunnel face.

[0129] The first inversion unit: Invert the central coordinates of the bottom of the test holes behind the tunnel face according to the central coordinates of the orifice and the drilling depth.

[0130] The second inversion unit: Acquire the coordinates of the blast source on the tunnel face, and use the coordinate system inversion method to invert the propagation path of the stress wave reaching the bottom of the test holes behind the tunnel face according to the coordinates of the blast source, the central coordinates of the bottom of the holes, and the actual distance from the blast source to the test holes.

[0131] The fitting unit: Fit the Sadovsky formula based on the propagation path to obtain the second blasting vibration velocity prediction model behind the tunnel face.

[0132] It should be noted that regarding the devices in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0133] Embodiment 3:

[0134] Corresponding to the above method embodiments, an internal blasting vibration prediction device for surrounding rock of deep-buried tunnels is also provided in this embodiment. An internal blasting vibration prediction device for surrounding rock of deep-buried tunnels described below can be correspondingly referred to with an internal blasting vibration prediction method for surrounding rock of deep-buried tunnels described above.

[0135] Figure 10 is a block diagram of an internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels shown according to an exemplary embodiment. As Figure 10 shown, the internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels may include: a processor 801, a memory 802. The internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0136] Among them, the processor 801 is used to control the overall operation of the internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels to complete all or part of the steps in the above-mentioned internal blasting vibration prediction method for surrounding rock of deep-buried tunnels. The memory 802 is used to store various types of data to support the operation of the internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels. These data may include, for example, instructions for any application or method operating on the internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels, as well as application-related data, such as contact data, sent and received messages, pictures, audio, video, and so on. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc. The multimedia component 803 may include a screen and an audio component. Among them, the screen can be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone, and the microphone is used to receive external audio signals. The received audio signals can be further stored in the memory 802 or sent through the communication component 805. The audio component further includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules can be a keyboard, a mouse, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the internal blasting vibration prediction device 800 for surrounding rock of deep-buried tunnels and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, and an NFC module.

[0137] In an exemplary embodiment, the deep-buried tunnel surrounding rock internal blasting vibration prediction device 800 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is used to execute the above-mentioned deep-buried tunnel surrounding rock internal blasting vibration prediction method.

[0138] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When the program instructions are executed by a processor, the steps of the above-mentioned deep-buried tunnel surrounding rock internal blasting vibration prediction method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 802 including program instructions, and the above-mentioned program instructions can be executed by the processor 801 of the deep-buried tunnel surrounding rock internal blasting vibration prediction device 800 to complete the above-mentioned deep-buried tunnel surrounding rock internal blasting vibration prediction method.

[0139] Embodiment 4:

[0140] Corresponding to the above method embodiment, a readable storage medium is further provided in this embodiment. A readable storage medium described below can be correspondingly referred to with a deep-buried tunnel surrounding rock internal blasting vibration prediction method described above.

[0141] A readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the deep-buried tunnel surrounding rock internal blasting vibration prediction method in the above method embodiment are implemented.

[0142] The readable storage medium can specifically be various readable storage media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disc that can store program codes.

[0143] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0144] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for predicting internal blasting vibration of surrounding rock in deep-buried tunnels, characterized in that Including: Horizontally drilling a plurality of test holes into the surrounding rock from the prior tunnel, and sequentially installing blasting vibration sensors at the bottoms of each test hole. The plurality of test holes are evenly distributed in front of and behind the heading face with the heading face as the symmetry plane; Conducting blasting on the subsequent tunnel to obtain the vibration data of the test holes collected by the vibration sensors; Obtaining the distance from the blast center of the test holes in front of the heading face, and fitting the Sadovsky formula with the vibration data and the distance from the blast center of the test holes in front of the heading face to obtain the first blasting vibration velocity prediction model in front of the heading face; Obtaining the blasting charge of the subsequent tunnel, substituting the vibration data and the blasting charge of the test holes behind the heading face into the first blasting vibration velocity prediction model, and calculating the actual distance from the blast center when the blast source propagates to the test holes; Fitting the Sadovsky formula with the actual distance from the blast center and the vibration data of the test holes behind the heading face to obtain the second blasting vibration velocity prediction model behind the heading face, including: Obtaining the central coordinates of the orifice of the test holes behind the heading face; Inverting the central coordinates of the bottom of the test holes behind the heading face based on the central coordinates of the orifice and the drilling depth; Obtaining the coordinates of the blast source of the heading face, and inversely obtaining the propagation path of the stress wave reaching the bottom of the test holes behind the heading face by using the coordinate system inversion method according to the coordinates of the blast source, the central coordinates of the bottom of the holes, and the actual distance from the blast center; Fitting the Sadovsky formula based on the propagation path to obtain the second blasting vibration velocity prediction model behind the heading face; Wherein, a blasting vibration sensor is installed at the bottom of each test hole, and the blasting vibration sensor includes: A sensor body, which is located at the upper part of the blasting vibration sensor; A containing box body, which is located at the lower part of the blasting vibration sensor. A blocking layer is provided between the containing box body and the sensor body, and a plurality of through holes are provided in the containing box body along the circumferential direction; A pushing and pulling device, which is located inside the containing box body. The top of the pushing and pulling device is fixedly connected to the inner top surface of the containing box body. A plurality of support rods of the pushing and pulling device extend outward along the plurality of through holes to contact the inner wall of the test hole, and the blasting vibration sensor is fixed in the test hole; Wherein, the pushing and pulling device includes: A push rod, inside which a spring is arranged along the vertical direction. A slider is sleeved outside the push rod along the circumferential direction, and the slider slides radially along the push rod; a button is arranged below the push rod; An end handle, on the side wall of which a bayonet is provided. The end handle is fixedly connected to the button through the bayonet; A rod cap, which is fixed to the top of the push rod; A pulley group, which includes a fixed pulley, a slider and a traction rope. The fixed pulley is fixed on the rod cap. The slider is nested outside the push rod and moves radially along the push rod. One end of the traction rope is sequentially connected to the fixed pulley and the slider, and the other end radially passes through the inside of the spring and is connected with a hook.

2. The method for predicting internal blasting vibration of surrounding rock in deep-buried tunnels according to claim 1, characterized in that Horizontally drilling a plurality of test holes into the surrounding rock from the prior tunnel, including: Determining the horizontal height for drilling the test holes on the wall of the prior tunnel, and determining the horizontal distance between two adjacent test holes; Obtain the drilling depth of the test holes, where the drilling depth includes a first depth and a second depth, and multiple test holes are drilled alternately according to the first depth and the second depth; Drill at least 4 test holes in sequence along the front of the heading face according to the horizontal height, horizontal distance, and depth; Taking the heading face as the symmetry plane, symmetrically drill the same number of test holes behind the heading face.

3. A prediction system for internal blasting vibration of surrounding rock in deep-buried tunnels, characterized in that, Include: Arrangement module: Horizontally drill multiple test holes from the advanced tunnel into the surrounding rock, and install blasting vibration sensors at the bottom of each test hole in sequence. The multiple test holes are evenly distributed in front of and behind the heading face with the heading face as the symmetry plane; Acquisition module: Blast the subsequent tunnel and obtain the vibration data of the test holes collected by the vibration sensors; First fitting module: Obtain the distance from the blast center of the test holes in front of the heading face, and use the vibration data and the distance from the blast center of the test holes in front of the heading face to fit the Sadovskii formula to obtain the first blasting vibration velocity prediction model in front of the heading face; First calculation module: Obtain the blasting charge of the subsequent tunnel, substitute the vibration data and the blasting charge of the test holes behind the heading face into the first blasting vibration velocity prediction model, and calculate the actual distance from the blast center when the blast source propagates to the test holes; Second fitting module: Use the actual distance from the blast center and the vibration data of the test holes behind the heading face to fit the Sadovskii formula to obtain the second blasting vibration velocity prediction model behind the heading face, including: Third acquisition unit: Obtain the central coordinates of the orifice of the test holes behind the heading face; First inversion unit: Invert the central coordinates of the bottom of the test holes behind the heading face according to the central coordinates of the orifice and the drilling depth; Second inversion unit: Obtain the coordinates of the blast source on the heading face, and according to the coordinates of the blast source, the central coordinates of the bottom of the hole, and the actual distance from the blast center, use the coordinate system inversion method to invert the propagation path of the stress wave reaching the bottom of the test holes behind the heading face; Fitting unit: Based on the propagation path, fit the Sadovskii formula to obtain the second blasting vibration velocity prediction model behind the heading face; Wherein, install a blasting vibration sensor at the bottom of each test hole, and the blasting vibration sensor includes: Sensor body, which is located at the upper part of the blasting vibration sensor; Accommodating box body, which is located at the lower part of the blasting vibration sensor. A blocking layer is provided between the accommodating box body and the sensor body, and a plurality of through holes are provided in the accommodating box body along the circumferential direction; Pushing and pulling device, which is located inside the accommodating box body. The top of the pushing and pulling device is fixedly connected to the inner top surface of the accommodating box body. A plurality of support rods of the pushing and pulling device extend outward along the plurality of through holes and contact the inner wall of the test hole to fix the blasting vibration sensor in the test hole; Wherein, the pushing and pulling device includes: Push rod, a spring is arranged vertically inside the push rod, a slider is sleeved on the outside of the push rod along the circumferential direction, and the slider slides radially along the push rod; a button is arranged below the push rod; End handle, a bayonet is provided on the side wall of the end handle, and the end handle is fixedly connected to the button through the bayonet; Rod cap, which is fixed to the top of the push rod; Pulley block, the pulley block includes a fixed pulley, a slider and a traction rope, the fixed pulley is fixed on the rod cap, the slider is nested on the outer side of the push-pull rod and moves radially along the push-pull rod, one end of the traction rope is sequentially connected to the fixed pulley and the slider, and the other end radially passes through the inside of the spring and is connected with a hook.

4. The internal blasting vibration prediction system for surrounding rock of deep-buried tunnels according to claim 3, wherein, The arrangement module includes: The first determination unit: determine the horizontal height of the test hole drilling on the wall of the advanced tunnel and determine the horizontal distance between two adjacent test holes; The first acquisition unit: acquire the drilling depth of the test hole, the drilling depth includes a first depth and a second depth, and a plurality of test holes are drilled alternately according to the first depth and the second depth; The first arrangement unit: drill at least 4 test holes in sequence along the front of the heading face according to the horizontal height, horizontal distance and depth; The second arrangement unit: use the heading face as the symmetry plane and symmetrically drill the same number of test holes behind the heading face.

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