Roadway roof anchoring support impact resistance analysis system

Abstract

The invention discloses a system for analyzing the impact resistance of a roadway roof anchoring support, and relates to the technical field of roadway supports. The system comprises an analysis unit, an image module, a database, a hammering device, a laser module and a positioning module, the output end of the image module is connected with the input end of the analysis unit, a port of the database is in data connection with a port of the analysis unit, and the output ends of the laser module and the positioning module are both connected with the input end of the analysis unit. Data connection is established between a port of the analysis unit and a port of the hammering device, the analysis unit executes an impact simulation program and sends n times of hammering instructions to the hammering device, and a hammer head of the hammering device hammers the side face of the anchoring exposed part. The anti-impact capability of the bottom plate anchor can be quantified into the anti-impact index, and the detection and analysis process can be accelerated by calculating the similarity index of each anchor and the anti-impact reference object.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel support, and in particular to an analysis system for the impact resistance of tunnel roof anchor support. Background Art

[0002] In mining, the stability of the tunnel involves the safety of personnel, so the tunnel floor needs to have a certain impact resistance. The anchoring technology can effectively connect the bottom rock layer with the deep stable rock mass by inserting anchor rods or anchor cables into the rock mass of the tunnel floor to form a whole. Together, they bear the pressure of the overlying rock layer, thereby improving the stability of the tunnel floor. The current tunnel support method is to achieve the impact resistance of the floor by installing anchors in the tunnel floor for support.

[0003] When dealing with complex geological conditions and high-stress environments, traditional anchor support methods are unable to detect the impact resistance of each anchor support. Operators installing anchors on the base plate cannot obtain feedback on the impact resistance of the anchors after installation, resulting in an inability to establish an effective feedback mechanism between the installation end of the base plate anchor and the actual application end. After the base plate anchor is installed, testing the installation point of each anchor will increase the construction workload and delay the progress of the project. Therefore, how to quickly analyze the impact resistance of each anchor support is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a tunnel roof anchor support impact resistance analysis system, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a tunnel roof anchor support impact resistance analysis system, including an analysis unit, an image module, a database, a hammer device, a laser module and a positioning module, the output end of the image module is connected to the input end of the analysis unit, the port of the database is connected to the port of the analysis unit, the output ends of the laser module and the positioning module are connected to the input end of the analysis unit, and the port of the analysis unit is connected to the port of the hammer device;

[0006] The analysis unit executes the simulated impact program and sends n hammering instructions to the hammering device. The hammer head of the hammering device hammers the side of the exposed part of the anchor. The hammering device obtains the operation information of the hammer head when hammering and transmits it to the analysis unit. The analysis unit calculates and obtains the impact energy E of the initial hammering of the hammer head and the final speed v2 of the hammer head from the second to the nth time. The anchor is an anchor rod embedded in the top plate of the tunnel. The laser module measures the offset distance Δx of the anchor and transmits it to the analysis unit. The positioning module is installed and fixed on the side of the anchor support point. The positioning module obtains the support point coordinate Q of the anchor and transmits it to the analysis unit. The database is used to store the analysis data of the analysis unit, the image information of the image module, the hammer head striking area A of the hammer head of the hammering device, the hammer head mass m of the hammer head of the hammering device, the elastic modulus Em of the anchor, the support point coordinate Q and the Poisson's ratio u of the anchor, wherein the hammer head striking area A of the hammer head of the hammering device, the hammer head mass m of the hammer head of the hammering device, the elastic modulus Em of the anchor and the Poisson's ratio u of the anchor are all measured in advance and entered into the database for storage;

[0007] The analysis unit executes an angle analysis program to obtain an offset angle θx of the anchor, the analysis unit executes a stress analysis program to obtain an anchor support impact resistance index ψ, the analysis unit saves the anchor support impact resistance index ψ and the corresponding support point coordinates Q to a database, and the analysis unit executes a classification program to classify all anchors on the tunnel roof, marking them into three categories: strong impact resistance, general impact resistance, and weak impact resistance;

[0008] When the simulated impact program is executed, the hammer head of the hammering device hammers for the first time, and the hammering device transmits the operation information to the analysis unit. The laser module transmits the offset distance Δx of the anchor to the analysis unit. The analysis unit calculates the anchor offset distance Δx according to formula 1. Calculate the impact energy E of the hammer head of the hammer device, where v(t) is the velocity that changes with the hammer time t, F(t) is the impact force that changes with the hammer time t, and k is the deformation coefficient of the anchor surface;

[0009] The analysis unit is based on formula 2 Simulate and calculate the impact energy En of the hammer of the hammer device from the second to the nth hammering, where n is the number of hammering times, the specific value of n is randomly generated by the analysis unit, and r is a random number randomly generated by the analysis unit within a range of 1 to 5. The analysis unit assigns the impact energy En to the impact energy E and inputs it into Formula 1. In Formula 1, the values ​​of the initial velocity v1 of the hammer, the hammering time t, the striking area A of the hammer of the hammer device, the mass m of the hammer of the hammer device, the offset distance Δx, the elastic modulus Em of the anchor, and the Poisson's ratio u of the anchor remain unchanged. The analysis unit reversely derives and calculates the final velocity v2 of the hammer of the hammer device from the second to the nth time;

[0010] The analysis unit transmits the hammer head terminal velocity v2 from the second to the nth time to the hammering device, and the hammering device hammers the side of the exposed anchor portion according to the hammer head terminal velocity v2 until the hammer head hammers for the nth time and the simulation impact program stops;

[0011] The hammer head hammers n times. When the hammer head of the hammering device hammers the side of the exposed anchor part for the third to n-1th time, the analysis unit executes a stress analysis program. Each time the hammer head hammers, the analysis unit presets a time node equal fraction i. The analysis unit transmits the time node equal fraction to the laser module. The laser module divides the hammering time t into i time nodes. When the laser module is at each time node, it obtains an offset distance Δx of the side of the exposed anchor part and transmits it to the analysis unit. The analysis unit establishes a curve table with length as the vertical axis and time as the horizontal axis. The analysis unit sequentially inputs all the received offset distances Δx into the curve table to obtain an offset distance curve when the side of the exposed anchor part is hammered.

[0012] The analysis unit is calculated by formula three Calculate the specific value of the time node equal score i, the initial value of i is 10, and the time node equal score i needs to be recalculated by formula 3 each time the hammer head completes the hammering;

[0013] The analysis unit divides the offset distance curve into s equal intervals u, and marks the starting point coordinates of each equal interval u as (ax, as). The analysis unit presets a sliding window of 3u, and the sliding direction of the sliding window is from left to right. The analysis unit calculates the starting point coordinates of each equal interval u according to formula 4 Calculate the slope η of the curve in the sliding window, (ax', as') is the coordinate of the starting point of the first equally divided interval u in the sliding window, (ax", as") is the coordinate of the starting point of the last equally divided interval u in the sliding window, and each time the analysis unit calculates the slope η of the curve, the sliding window slides to the right by one equally divided interval u until the sliding window moves to the end of the offset distance curve;

[0014] The analysis unit counts the number of times when the slope η of the curve is less than 0 and marks it as b1, and the analysis unit counts the number of times when the slope η is greater than or equal to 0 and marks it as b2. The analysis unit calculates the number of times when the slope η is greater than or equal to 0 according to formula 5. Calculate the support impact resistance index ψ of the anchor. When the support impact resistance index ψ of the anchor is greater than 50, the analysis unit marks the corresponding anchor as an impact resistance reference, and the stress analysis program terminates. When the support impact resistance index ψ of the anchor is less than or equal to 50, the analysis unit randomly selects another anchor to repeat the stress analysis program until an impact resistance index ψ greater than 50 is obtained.

[0015] After the stress analysis program is executed once, the operator uses the hammering device to hammer the unhammered anchors one by one. Each time the hammer head hammers, the laser module measures the offset distance Δx of the anchor again and transmits it to the analysis unit. The image module obtains the image information of the tunnel roof anchor and transmits it to the analysis unit. The analysis unit executes the classification program. Through the simulation impact program and the stress analysis program, the impact resistance of the bottom plate anchor can be quantified into an impact resistance index, and the impact resistance of the bottom plate anchor can be intuitively judged.

[0016] When the classification procedure is executed, the analysis unit marks the anchor offset distance Δx that is hammered only once as Δfr. The analysis unit uses formula 6 to Calculate the first similarity σ1 between the anchorage struck only once and the anchorage struck n times;

[0017] The operator manually marks the color CMYK color separation value C of the impact-resistant reference object in the image information cmyk The analysis unit is input into the analysis unit, which has a preset tolerance range of ±5%. Each pixel in the image information corresponding to the anchorage struck once is compared with the four-color separation value C cmyk In contrast, the analysis unit converts the value into the four-color value C cmyk The four-color value C within the compatible range cmyk The pixel is marked as an anchor molecule. The analysis unit generates horizontal cutting lines at the top and bottom of the anchor molecule in each image information, and generates vertical cutting lines at the left and right of the anchor molecule in each image information. The two horizontal cutting lines and the two vertical cutting lines intersect and close to form a cutting rectangle. The cutting rectangle is also applicable to the image information of the anchor hammered n times. The analysis unit converts the anchor color cmyk four-color separation value C in the image information of the anchor hammered n times cmyk The pixels of the same use the topmost horizontal cutting line, the bottommost horizontal cutting line, the leftmost vertical cutting line and the rightmost vertical cutting line to form a cutting rectangle, and the analysis unit hammers the anchored image information of n times with the four-color value C cmyk The pixels of are marked as anchor references;

[0018] In the cropped rectangle, the analysis unit sets the coordinates of the top, bottom, leftmost and rightmost anchor references to (W1, Y1), (W2, Y2), (W3, Y3) and (W4, Y5) in sequence, and sets the coordinates of the anchor molecules in the image information of each hammering n times to (w1, y1), (w2, y2), (w3, y3) and (w4, y5) in sequence. The analysis unit calculates the anchor molecules according to Formula 7. Calculate the second similarity σ2 of the anchor molecule in the image information corresponding to each anchor struck once and the anchor reference in the image information corresponding to the anchor struck n times, the analysis unit multiplies the first similarity σ1 and the second similarity σ2 to obtain a similarity index Δσ, and the analysis unit repeatedly calculates formula 6 and formula 7 until all image information corresponding to the anchor struck once is calculated and then stops;

[0019] The analysis unit arranges the similarity index Δσ corresponding to the image information corresponding to each anchor struck once in descending order to obtain a similarity sequence. The analysis unit marks the anchors corresponding to the similarity index Δσ of the first 17% in the similarity sequence as having strong impact resistance, and transmits the anchors and support point coordinates Q having strong impact resistance to the database for storage. The analysis unit marks the anchors corresponding to the similarity index Δσ of the first 18% to 51% in the similarity sequence as having average impact resistance, and transmits the anchors and support point coordinates Q having average impact resistance to the database for storage. The analysis unit marks the anchors corresponding to the remaining similarity indexes Δσ in the similarity sequence as having weak impact resistance, and transmits the anchors and support point coordinates Q having weak impact resistance to the database for storage. The operator can obtain the support impact resistance capacity of the tunnel roof anchor and the corresponding support point coordinates Q by reading the database, and obtain the similarity index of each anchor and the impact resistance reference object by calculating the first similarity and the second similarity, so that the impact resistance capacity of each anchor can be quickly judged through the image information, and the detection and analysis process can be accelerated.

[0020] The analysis data includes the impact energy E of the hammer's first hammering, the impact energy En of the hammer's second to nth hammering, the deformation coefficient k of the anchoring surface, the velocity v(t) that changes with the hammering time t, the impact force F(t) that changes with the hammering time t, the offset angle θx, the number of hammerings n and the random number r. The operation information includes the initial velocity v1 of the hammer head of the hammering device, the final velocity v2 of the hammer head of the hammering device and the hammering time t.

[0021] Further, when the hammer head of the hammering device hammers the side of the exposed part of the anchor for the second and nth time, the analysis unit starts to execute the angle analysis program, the laser module divides the side of the exposed part of the anchor into five equally spaced distance points, and the equally spaced distance d and the offset distance Δx of the five equally spaced distance points are obtained when the hammer head hammers the anchor and transmit them to the analysis unit, and the analysis unit marks the received offset distance Δx as x1, x2, x3, x4 and x5 respectively;

[0022] The analysis unit is based on formula eight The initial offset angle θ1 of the anchor at the second hammering and the final offset angle θ2 at the nth hammering are calculated respectively. Formula 8 is a general formula. The initial offset angle θ1 and the final offset angle θ2 are both calculated by formula 8.

[0023] The analysis unit subtracts the initial offset angle θ1 from the final offset angle θ2 to obtain the offset angle θx.

[0024] Furthermore, the number s of the equally divided intervals u is determined by the number of hammer blows n of the hammer head and the slope η of the curve, and the analysis unit determines the specific value according to Formula 9. Calculate the number s of equally divided intervals u.

[0025] The present invention has the following beneficial effects:

[0026] 1. Through the simulation impact program and stress analysis program, the impact resistance of the bottom plate anchor can be quantified into an impact resistance index, which can intuitively judge the impact resistance of the bottom plate anchor.

[0027] 2. The similarity index between each anchor and the impact-resistant reference object is obtained by calculating the first similarity and the second similarity, so that the impact resistance of each anchor can be quickly judged through image information, which can speed up the detection and analysis process.

[0028] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0030] Figure 1 This is a block diagram of a system for analyzing the impact resistance of tunnel roof anchor support according to the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1The present invention provides a technical solution: a tunnel roof anchor support impact resistance analysis system, comprising an analysis unit, an image module, a database, a hammer device, a laser module and a positioning module, wherein the output end of the image module is connected to the input end of the analysis unit, the port of the database is connected to the port of the analysis unit, the output ends of the laser module and the positioning module are connected to the input end of the analysis unit, and the port of the analysis unit is connected to the port of the hammer device;

[0033] The analysis unit executes the simulated impact program and sends n hammering instructions to the hammering device. The hammer head of the hammering device hammers the side of the exposed part of the anchor. The hammering device obtains the operation information of the hammer head when hammering and transmits it to the analysis unit. The analysis unit calculates the impact energy E of the initial hammering of the hammer head and the final speed v2 of the hammer head from the second to the nth time. The anchor is an anchor rod embedded in the top plate of the tunnel. The laser module measures the offset distance Δx of the anchor and transmits it to the analysis unit. The positioning module is installed and fixed on the side of the anchor support point. The positioning module obtains the support point coordinate Q of the anchor and transmits it to the analysis unit. The database is used to store the analysis data of the analysis unit, the image information of the image module, the hammer head striking area A of the hammer head of the hammering device, the hammer head mass m of the hammer head of the hammering device, the elastic modulus Em of the anchor, the support point coordinate Q and the Poisson's ratio u of the anchor, wherein the hammer head striking area A of the hammer head of the hammering device, the hammer head mass m of the hammer head of the hammering device, the elastic modulus Em of the anchor and the Poisson's ratio u of the anchor are all measured in advance and entered into the database for storage;

[0034] The analysis unit executes an angle analysis program to obtain the offset angle θx of the anchor, and executes a stress analysis program to obtain the support impact resistance index ψ of the anchor. The analysis unit saves the support impact resistance index ψ of the anchor and the corresponding support point coordinate Q to the database. The analysis unit executes a classification program to classify all anchors on the top plate of the roadway, marking them into three categories: strong impact resistance, general impact resistance, and weak impact resistance.

[0035] When the simulated impact program is executed, the hammer head of the hammer device hammers for the first time, the hammer device transmits the operation information to the analysis unit, and the laser module transmits the offset distance Δx of the anchor to the analysis unit. The analysis unit calculates the offset distance Δx according to formula 1. Calculate the impact energy E of the hammer head of the hammer device, where v(t) is the velocity that changes with the hammer time t, F(t) is the impact force that changes with the hammer time t, and k is the deformation coefficient of the anchor surface;

[0036] The analysis unit is based on formula 2 Simulate and calculate the impact energy En of the hammer of the hammer device from the second to the nth hammering, where n is the number of hammering times, the specific value of n is randomly generated by the analysis unit, and r is a random number randomly generated by the analysis unit within a range of 1 to 5. The analysis unit assigns the impact energy En to the impact energy E and inputs it into Formula 1. In Formula 1, the values ​​of the initial velocity v1 of the hammer, the hammering time t, the striking area A of the hammer of the hammer device, the mass m of the hammer of the hammer device, the offset distance Δx, the elastic modulus Em of the anchor, and the Poisson's ratio u of the anchor remain unchanged. The analysis unit reversely derives and calculates the final velocity v2 of the hammer of the hammer device from the second to the nth time;

[0037] The analysis unit transmits the hammer head terminal velocity v2 from the second to the nth time to the hammering device, and the hammering device hammers the side of the exposed anchor portion according to the hammer head terminal velocity v2 until the hammer head hammers for the nth time and the simulation impact program stops;

[0038] When the hammer head of the hammering device hammers the side of the exposed anchor part for the third to n-1th time, the analysis unit executes a stress analysis program. Each time the hammer head hammers, the analysis unit presets a time node equal fraction i, and the analysis unit transmits the time node equal fraction to the laser module. The laser module divides the hammering time t into i time nodes. When the laser module is at each time node, it obtains an offset distance Δx of the side of the exposed anchor part and transmits it to the analysis unit. The analysis unit establishes a curve table with length as the vertical axis and time as the horizontal axis. The analysis unit sequentially inputs all the received offset distances Δx into the curve table to obtain an offset distance curve when the side of the exposed anchor part is hammered.

[0039] The analysis unit is calculated by formula three Calculate the specific value of the time node equal score i, the initial value of i is 10, and the time node equal score i needs to be recalculated by formula 3 each time the hammer head completes the hammering;

[0040] The analysis unit divides the offset distance curve into s equal intervals u. The analysis unit marks the starting point coordinates of each equal interval u as (ax, as). The analysis unit presets a sliding window of 3u. The sliding direction of the sliding window is from left to right. The analysis unit calculates the value of the sliding window according to formula 4. Calculate the slope η of the curve in the sliding window, (ax', as') is the coordinate of the starting point of the first equally divided interval u in the sliding window, (ax", as") is the coordinate of the starting point of the last equally divided interval u in the sliding window, and each time the analysis unit calculates the slope η of the curve, the sliding window slides to the right by one equally divided interval u until the sliding window moves to the end of the offset distance curve;

[0041] The analysis unit counts the number of times when the slope η is less than 0 and marks it as b1. The analysis unit counts the number of times when the slope η is greater than or equal to 0 and marks it as b2. The analysis unit calculates the number of times when the slope η is greater than or equal to 0 according to formula 5. Calculate the support impact resistance index ψ of the anchor. When the support impact resistance index ψ of the anchor is greater than 50, the analysis unit marks the corresponding anchor as an impact resistance reference, and the stress analysis program terminates. When the support impact resistance index ψ of the anchor is less than or equal to 50, the analysis unit randomly selects another anchor to repeat the stress analysis program until an impact resistance index ψ greater than 50 is obtained.

[0042] After the stress analysis program is executed once, the operator uses the hammering device to hammer the unhammered anchors one by one. Each time the hammer head hammers, the laser module measures the offset distance Δx of the anchor again and transmits it to the analysis unit. The image module obtains the image information of the tunnel roof anchor and transmits it to the analysis unit, which executes the classification program.

[0043] When the classification procedure is executed, the analysis unit marks the anchor offset distance Δx that is hammered only once as Δfr. The analysis unit uses formula 6 to Calculate the first similarity σ1 between the anchorage struck only once and the anchorage struck n times;

[0044] The operator manually marks the color CMYK color separation value C of the impact-resistant reference object in the image information cmyk The analysis unit is input into the analysis unit, which has a preset tolerance range of ±5%. Each pixel in the image information corresponding to the anchorage struck once is compared with the four-color separation value C cmyk In contrast, the analysis unit converts the value into the four-color value C cmyk The four-color value C within the compatible range cmyk The pixel is marked as an anchor molecule. The analysis unit generates horizontal cutting lines at the top and bottom of the anchor molecule in each image information, and generates vertical cutting lines at the left and right of the anchor molecule in each image information. The two horizontal cutting lines and the two vertical cutting lines intersect and close to form a cutting rectangle. The cutting rectangle is also applicable to the image information of the anchor hammered n times. The analysis unit converts the anchor color cmyk four-color separation value C in the image information of the anchor hammered n times cmyk The pixels of the same use the topmost horizontal cutting line, the bottommost horizontal cutting line, the leftmost vertical cutting line and the rightmost vertical cutting line to form a cutting rectangle, and the analysis unit hammers the anchored image information of n times with the four-color value C cmyk The pixels are marked as anchor references. The purpose of cropping rectangle is to align all anchors in the image information according to a standard, which is convenient for the subsequent calculation of the tilt index of each anchor.

[0045] In the cropped rectangle, the analysis unit sets the coordinates of the top, bottom, leftmost and rightmost anchor references to (W1, Y1), (W2, Y2), (W3, Y3) and (W4, Y5) in sequence, and sets the coordinates of the anchor molecules in the image information of each hammering n times to (w1, y1), (w2, y2), (w3, y3) and (w4, y5) in sequence. The analysis unit calculates the anchor molecules according to Formula 7. Calculate the second similarity σ2 of the anchor molecule in the image information corresponding to each anchor struck once and the anchor reference in the image information corresponding to the anchor struck n times, the analysis unit multiplies the first similarity σ1 and the second similarity σ2 to obtain a similarity index Δσ, and the analysis unit repeatedly calculates formula 6 and formula 7 until all image information corresponding to the anchor struck once is calculated and then stops;

[0046] The analysis unit arranges the similarity index Δσ corresponding to the image information corresponding to each anchor struck once in order from large to small to obtain a similarity sequence. The analysis unit marks the anchors corresponding to the first 17% of the similarity index Δσ in the similarity sequence as having strong impact resistance, and transmits the anchors and support point coordinates Q having strong impact resistance to the database for storage. The analysis unit marks the anchors corresponding to the first 18% to 51% of the similarity index Δσ in the similarity sequence as having average impact resistance, and transmits the anchors and support point coordinates Q having average impact resistance to the database for storage. The analysis unit marks the anchors corresponding to the remaining similarity indexes Δσ in the similarity sequence as having weak impact resistance, and transmits the anchors and support point coordinates Q having weak impact resistance to the database for storage. The operator can obtain the support impact resistance capacity of the tunnel roof anchor and the corresponding support point coordinates Q by reading the database.

[0047] The analysis data include the impact energy E of the first hammer blow, the impact energy En of the second to nth hammer blows, the deformation coefficient k of the anchor surface, the velocity v(t) that changes with the hammer blow time t, the impact force F(t) that changes with the hammer blow time t, the offset angle θx, the number of hammer blows n and the random number r. The operation information includes the initial velocity v1 of the hammer head of the hammer device, the final velocity v2 of the hammer head of the hammer device and the hammer blow time t.

[0048] When the hammer head of the hammering device hammers the side of the exposed part of the anchor for the second and nth time, the analysis unit starts to execute the angle analysis program, and the laser module divides the side of the exposed part of the anchor into five equally spaced distance points, with an equally spaced distance of d. When the hammer head hammers the anchor, the equally spaced distance d and the offset distance Δx of the five ranging points are obtained and transmitted to the analysis unit, and the analysis unit marks the received offset distances Δx as x1, x2, x3, x4 and x5 respectively;

[0049] The analysis unit is based on formula eight

[0050] The initial offset angle θ1 of the anchor at the second hammering and the final offset angle θ2 at the nth hammering are calculated respectively. Formula 8 is a general formula. The initial offset angle θ1 and the final offset angle θ2 are both calculated by formula 8.

[0051] The analysis unit subtracts the initial offset angle θ1 from the final offset angle θ2 to obtain the offset angle θx.

[0052] The number s of equally divided intervals u is determined by the number of hammer blows n and the slope η of the curve. The analysis unit is based on formula 9. Calculate the number s of equally divided intervals u.

[0053] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tunnel roof anchor support impact resistance analysis system, characterized by: It includes an analysis unit, an image module, a database, a hammer device, a laser module and a positioning module, wherein the output end of the image module is connected to the input end of the analysis unit, the port of the database is data-connected to the port of the analysis unit, the output ends of the laser module and the positioning module are both connected to the input end of the analysis unit, and the port of the analysis unit is data-connected to the port of the hammer device; The analysis unit executes the simulated impact program and sends n hammering instructions to the hammering device. The hammer head of the hammering device hammers the side of the exposed part of the anchor. The hammering device obtains the operation information of the hammer head when hammering and transmits it to the analysis unit. The impact energy E of the initial hammering of the hammer head and the terminal velocity v2 of the hammer head from the second to the nth time are calculated. The laser module measures the offset distance Δx of the anchor and transmits it to the analysis unit. The positioning module obtains the support point coordinate Q of the anchor and transmits it to the analysis unit. The analysis unit executes an angle analysis program to obtain the offset angle θx of the anchor, and the analysis unit executes a stress analysis program to obtain the support impact resistance index ψ of the anchor. The analysis unit saves the support impact resistance index ψ of the anchor and the corresponding support point coordinates Q to the database. The analysis unit executes a classification program to classify all anchors on the tunnel roof, and marks them into three categories: strong impact resistance, general impact resistance, and weak impact resistance.

2. The tunnel roof anchor support impact resistance analysis system according to claim 1, characterized in that: When the simulated impact program is executed, the hammer head of the hammering device hammers for the first time, and the hammering device transmits the operation information to the analysis unit. The laser module transmits the offset distance Δx of the anchor to the analysis unit. According to formula 1 Calculate the impact energy E of the hammer head of the hammer device, where v(t) is the velocity that changes with the hammer time t, F(t) is the impact force that changes with the hammer time t, and k is the deformation coefficient of the anchor surface; According to formula 2 Simulate and calculate the impact energy En of the hammer head of the hammer device from the second to the nth hammering, where n is the number of hammering times of the hammer head, and r is a random number randomly generated by the analysis unit. The analysis unit assigns the impact energy En to the impact energy E and inputs it into Formula 1. In Formula 1, the values ​​of the initial velocity v1 of the hammer head, the hammering time t, the striking area A of the hammer head of the hammer device, the mass m of the hammer head of the hammer device, the offset distance Δx, the elastic modulus Em of the anchor, and the Poisson's ratio u of the anchor remain unchanged. The analysis unit reversely derives and calculates the final velocity v2 of the hammer head of the hammer device from the second to the nth time. The final hammer speed v2 from the second to the nth time is transmitted to the hammering device, and the hammering device hammers the side of the exposed anchor portion according to the final hammer speed v2 until the hammer hits n times and the simulated impact program stops.

3. The tunnel roof anchor support impact resistance analysis system according to claim 1, characterized in that: The hammer head hammers n times. When the hammer head of the hammering device hammers the side of the exposed anchor part for the third to n-1th time, the analysis unit executes a stress analysis program. Each time the hammer head hammers, a time node equal fraction i is preset. The analysis unit transmits the time node equal fraction to the laser module. The laser module divides the hammering time t into i time nodes. When the laser module is at each time node, it obtains an offset distance Δx of the side of the exposed anchor part and transmits it to the analysis unit. A curve table is established with length as the vertical axis and time as the horizontal axis. The analysis unit sequentially inputs all the received offset distances Δx into the curve table to obtain an offset distance curve when the side of the exposed anchor part is hammered. The analysis unit is calculated by formula 3 Calculate and obtain the specific value of the time node equal score i. After each hammering, the time node equal score i needs to be recalculated using Formula 3; The offset distance curve is divided into s equal intervals u. The analysis unit marks the starting point coordinates of each equal interval u as (ax, as). The analysis unit presets a sliding window of 3u, and the sliding direction of the sliding window is from left to right. According to formula 4 Calculate the slope η of the curve in the sliding window, (ax', as') is the coordinate of the starting point of the first equally divided interval u in the sliding window, (ax", as") is the coordinate of the starting point of the last equally divided interval u in the sliding window, and each time the analysis unit calculates the slope η of the curve, the sliding window slides to the right by one equally divided interval u until the sliding window moves to the end of the offset distance curve; The number of times when the slope of the curve is η<0 is counted and marked as b1, and the number of times when the slope η≥0 is counted by the analysis unit and marked as b2. According to formula 5 Calculate the support impact resistance index ψ of the anchor. When the support impact resistance index ψ of the anchor is greater than 50, the analysis unit marks the corresponding anchor as an impact resistance reference and the stress analysis program terminates. When the support impact resistance index ψ of the anchor is less than or equal to 50, the analysis unit randomly selects another anchor and repeats the stress analysis program until an impact resistance index ψ greater than 50 is obtained.

4. The tunnel roof anchor support impact resistance analysis system according to claim 1, characterized in that: After the stress analysis program is executed once, the operator uses the hammering device to hammer the unhammered anchors one by one. Each time the hammer head hammers, the laser module measures the offset distance Δx of the anchor again and transmits it to the analysis unit. The image module obtains the image information of the tunnel roof anchor and transmits it to the analysis unit, and the analysis unit executes the classification program. When the classification procedure is executed, the analysis unit marks the anchor offset distance Δx that is hammered only once as Δfr. According to formula 6 Calculate the first similarity σ1 between the anchorage struck only once and the anchorage struck n times; The operator manually marks the color CMYK color separation value C of the impact-resistant reference object in the image information cmyk The analysis unit presets a compatible range and compares each pixel in the image information corresponding to the anchoring hammered once with the four-color value C cmyk In contrast, the analysis unit converts the value into the four-color value C cmyk The four-color value C within the compatible range cmyk The pixel is marked as an anchor molecule. The analysis unit generates horizontal cutting lines at the top and bottom of the anchor molecule in each image information, and generates vertical cutting lines at the left and right of the anchor molecule in each image information. The two horizontal cutting lines and the two vertical cutting lines intersect and close to form a cutting rectangle. The analysis unit will hammer the anchored image information with n times of four-color separation value C cmyk The pixels of are marked as anchor references; In the cropping rectangle, the analysis unit sets the coordinates of the top, bottom, leftmost and rightmost anchor references to (W1, Y1), (W2, Y2), (W3, Y3) and (W4, Y5) in sequence, and sets the coordinates of the anchor molecules in each image information to (w1, y1), (w2, y2), (w3, y3) and (w4, y5) in sequence. According to Formula 7 Calculate the second similarity σ2 between the anchoring molecule in each image information and the anchoring reference in the image information, the analysis unit multiplies the first similarity σ1 and the second similarity σ2 to obtain a similarity index Δσ, and the analysis unit repeatedly calculates formula 6 and formula 7 until all image information is calculated and stops; The analysis unit arranges the similarity index Δσ corresponding to each image information in order from large to small to obtain a similarity sequence. The analysis unit marks the anchors corresponding to the first 17% of the similarity index Δσ in the similarity sequence as strong impact resistance, and transmits the anchors and support point coordinates Q with strong impact resistance to the database for storage. The analysis unit marks the anchors corresponding to the first 18% to 51% of the similarity index Δσ in the similarity sequence as average impact resistance, and transmits the anchors and support point coordinates Q with average impact resistance to the database for storage. The analysis unit marks the anchors corresponding to the remaining similarity indexes Δσ in the similarity sequence as weak impact resistance, and transmits the anchors and support point coordinates Q with weak impact resistance to the database for storage. The operator can obtain the support impact resistance capability of the tunnel roof anchor and the corresponding support point coordinates Q by reading the database.

5. The tunnel roof anchor support impact resistance analysis system according to claim 1, characterized in that: When the hammer head of the hammering device hammers the side of the exposed part of the anchor for the second and nth time, the analysis unit starts to execute the angle analysis program, and the laser module divides the side of the exposed part of the anchor into five equally spaced distance points, and the equally spaced distance d and the offset distance Δx of the five equally spaced distance points are obtained when the hammer head hammers the anchor and transmitted to the analysis unit, and the received offset distances Δx are marked as x1, x2, x3, x4 and x5 respectively; According to formula eight Calculate the initial offset angle θ1 of the anchor at the second hammering and the final offset angle θ2 at the nth hammering respectively; The deviation angle θx is obtained by subtracting the initial deviation angle θ1 from the final deviation angle θ2.

6. The tunnel roof anchor support impact resistance analysis system according to claim 3, characterized in that: The number s of the equally divided intervals u is determined by the number of hammer blows n and the slope η of the curve. Calculate the number s of equally divided intervals u.

7. The tunnel roof anchor support impact resistance analysis system according to claim 1, characterized in that: The database is used to store the analysis data of the analysis unit, the image information of the image module, the hammer striking area A of the hammer device, the hammer mass m of the hammer device, the elastic modulus Em of the anchor, the support point coordinates Q and the Poisson's ratio u of the anchor; The analysis data includes the impact energy E of the hammer's first hammering, the impact energy En of the hammer's second to nth hammering, the deformation coefficient k of the anchoring surface, the velocity v(t) that changes with the hammering time t, the impact force F(t) that changes with the hammering time t, the offset angle θx, the number of hammerings n and the random number r. The operation information includes the initial velocity v1 of the hammer head of the hammering device, the final velocity v2 of the hammer head of the hammering device and the hammering time t.

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