Surrounding rock mechanical parameter real-time acquisition method based on TBM (Tunnel Boring Machine) airborne while-drilling system

Abstract

The invention discloses a surrounding rock mechanical parameter real-time acquisition method based on a TBM airborne while-drilling system, and belongs to the technical field of tunnel engineering. The method comprises the following steps: providing a TBM airborne while-drilling system; surrounding rock is positioned and drilled through the drilling system and the power system; while-drilling parameters of the pneumatic jumbolter are collected through the data monitoring system; calculating the acquired while-drilling parameters through a data analysis system to obtain an average value of each parameter; the average value obtained through calculation is input into a BP neural network model trained by a data analysis system, and the rock uniaxial compressive strength is obtained; and selecting the average value of the rock uniaxial compressive strength inversed by the while-drilling parameters of all the pneumatic jumbolters in the mileage of the TBM as the final surrounding rock mechanical parameter of the mileage. The method has the beneficial effects that the mechanical parameters of the surrounding rock can be more effectively inverted; the rapid sensing of the TBM rock-machine interaction mechanism is realized, so that the tunneling parameters of the TBM are optimized, and the tunneling efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system. Background Art

[0002] During the construction of a tunnel boring machine (TBM), the mechanical properties of rock directly affect the design of the surrounding rock support structure and the excavation efficiency. Therefore, accurate assessment and monitoring of rock strength is a key link in tunnel construction. Traditional rock strength testing methods include uniaxial compression tests, point load tests, and splitting tests. Although these methods can provide high-precision test results under laboratory conditions, they require sampling and laboratory analysis, are cumbersome to operate, time-consuming, and costly, making them difficult to apply in real time on site.

[0003] At present, the research on the mechanism of machine-rock interaction is mostly based on specific projects or test results. The methods for characterizing the parameters of tunneling and surrounding rock are relatively simple, resulting in a vague control of the mapping relationship between machine and rock parameters. The main reason is that the various parameters involved are not comprehensive enough, and there is a lack of research on the response mechanism of the main control parameters of TBM during the dynamic evolution of surrounding rock conditions from a time series perspective.

[0004] With the continuous development of TBM technology, the demand for real-time evaluation of rock mechanical parameters at construction sites has become increasingly urgent. Although there are some portable rock mechanical parameter detection devices on the market, these devices still face various challenges in actual use. For example, in the changing and complex environment of tunnel construction, the durability and accuracy of these devices are often difficult to ensure. In addition, most of the portable devices on the market currently require manual operation, so the test results are easily restricted by the operator's experience and technical ability, which makes standardized and automated testing difficult. Summary of the invention

[0005] The purpose of an embodiment of the present invention is to provide a method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system, which realizes real-time monitoring of rock strength without affecting the construction progress, provides timely and accurate rock mechanical performance data, and provides a strong basis for the dynamic optimization of surrounding rock support structure design, thereby solving at least one technical problem involved in the background technology.

[0006] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: In a first aspect, an embodiment of the present invention provides a method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system, comprising the following steps: Step S1, providing a TBM onboard drilling system, including a drilling system, a power system, a data monitoring system and a data analysis system; the drilling system includes a pneumatic anchor drill; Step S2, positioning and drilling the surrounding rock through the drilling system and the power system; Step S3, collecting drilling parameters of the pneumatic anchor drill through a data monitoring system, wherein the drilling parameters include rotary head speed, torque, drilling depth, thrust, impact pressure, and impact piston terminal speed; Step S4, calculating the collected drilling parameters through a data analysis system to obtain average values ​​of drilling speed, drill bit speed, thrust, torque, impact pressure and impact power; Step S5, inputting the calculated average values ​​into the BP neural network model trained by the data analysis system to predict the uniaxial compressive strength of the rock; Step S6, selecting the average value of the uniaxial compressive strength of rock obtained by inversion of drilling parameters of all pneumatic anchor drills at the mileage where the TBM airborne drilling system is located as the final surrounding rock mechanical parameters of the mileage.

[0007] In a second aspect, an embodiment of the present invention provides an electronic device, including: at least one processor; At least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the steps of the method described in the first aspect.

[0008] In a third aspect, an embodiment of the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0009] In a fourth aspect, an embodiment of the present invention provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can obtain the uniaxial compressive strength of the surrounding rock at the current mileage in real time through the drilling system. Compared with the traditional hydraulic anchor drilling rig, the impact energy is added as a new input feature of the model, which can more effectively invert the mechanical parameters of the surrounding rock; 2. In view of the harsh construction environment and numerous unsafe factors of open TBM, the present invention can realize the automatic acquisition of surrounding rock mechanical parameters and the rapid perception of the TBM rock-machine interaction mechanism, so as to optimize the TBM excavation parameters and improve the excavation efficiency; 3. Enrich and refine the mechanical parameters of tunnel surrounding rock to make up for the deficiencies in the previous geological survey report. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 It is a flow chart of a method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the anchor drilling rig drilling system provided by the present invention; Figure 3 It is one of the hardware structure diagrams of the electronic device provided by the present invention; Figure 4 This is the second schematic diagram of the hardware structure of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0012] 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 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.

[0013] The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0014] In conjunction with the accompanying drawings, the method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system provided by an embodiment of the present invention is described in detail below through specific embodiments and application scenarios.

[0015] See also Figure 1As shown, a method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system provided by an embodiment of the present invention includes the following steps: Step S1, providing a TBM onboard drilling system, including a drilling system, a power system, a data monitoring system and a data analysis system; the drilling system includes a pneumatic anchor drill; Step S2, positioning and drilling the surrounding rock through the drilling system and the power system; Step S3, collecting drilling parameters of the pneumatic anchor drill through a data monitoring system, wherein the drilling parameters include rotary head speed, torque, drilling depth, thrust, impact pressure, and impact piston terminal speed; Step S4, calculating the collected drilling parameters through a data analysis system to obtain average values ​​of drilling speed, drill bit speed, thrust, torque, impact pressure and impact power; The impact power is calculated by the following formula: ; ; In the formula, P Indicates the impact power, unit kW; E Indicates the impact energy, unit is J; f Indicates the impact frequency, unit Hz; m Indicates the mass of the impact piston, in kg; v m It indicates the final impact velocity of the piston, in m / s.

[0016] It should be noted that, in this step, only the impact power needs to be calculated, and the others are directly output by the sensor.

[0017] Step S5, inputting the calculated average values ​​into the BP neural network model trained by the data analysis system to predict the uniaxial compressive strength of the rock; Step S6, selecting the average value of the uniaxial compressive strength of rock obtained by inversion of drilling parameters of all pneumatic anchor drills at the mileage where the TBM airborne drilling system is located as the final surrounding rock mechanical parameters of the mileage.

[0018] In step S1, the data monitoring system includes a rotor speed sensor for collecting the rotor speed of the pneumatic anchor drill, a torque sensor for collecting the torque of the pneumatic anchor drill, a wire pull displacement sensor for collecting the drilling depth of the pneumatic anchor drill, a pressure sensor for collecting the thrust and impact pressure of the pneumatic anchor drill, and a photoelectric displacement sensor for collecting the final velocity of the impact piston of the pneumatic anchor drill.

[0019] Recombination Figure 2As shown, in a specific embodiment, the rotary head speed sensor and the torque sensor are replaced by a speed-torque composite sensor 1, and are installed at the connection between the drill pipe and the main machine; the pressure sensor 3 is installed on the forward and backward hydraulic circuits of the retreat machine and on the impact circuit; the wire-pull displacement sensor 2 is installed on the slide rail carrier to record the drill stroke of each drilling; the photoelectric displacement sensor 4 is installed near the impact piston.

[0020] In step S5, the BP neural network model is an existing model, which uses on-site sampling to perform indoor uniaxial compressive strength tests and existing excavation parameters as training data.

[0021] like Figure 3 As shown, an embodiment of the present invention further provides an electronic device 600, which includes a processor 601, a memory 602, and a program or instruction stored in the memory 602 and executable on the processor 601. When the program or instruction is executed by the processor 601, each process of the above-mentioned embodiment of the method for real-time acquisition of surrounding rock mechanical parameters based on the TBM airborne drilling system is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0022] It should be noted that the first electronic device in the embodiment of the present invention includes the mobile electronic device and the non-mobile electronic device mentioned above.

[0023] Figure 4 The present invention is a schematic diagram of the hardware structure of an electronic device.

[0024] The electronic device 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.

[0025] Those skilled in the art will appreciate that the electronic device 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 4 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0026] It should be understood that in the embodiment of the present invention, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes the image data of the static image or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include but are not limited to a physical keyboard, a function key (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here. The memory 709 may be used to store software programs and various data, including but not limited to applications and operating systems. The processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, the user interface, and the application program, etc., and the modem processor mainly processes wireless communication. It is understandable that the above-mentioned modem processor may not be integrated into the processor 710.

[0027] An embodiment of the present invention also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned embodiment of the method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0028] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0029] An embodiment of the present invention further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned embodiment of the method for real-time acquisition of surrounding rock mechanical parameters based on the TBM airborne drilling system, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0030] It should be understood that the chip mentioned in the embodiment of the present invention may also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0031] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present invention is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0032] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0033] An embodiment of the present invention further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned embodiment of the method for real-time acquisition of surrounding rock mechanical parameters based on the TBM airborne drilling system, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0034] It should be understood that the chip mentioned in the embodiment of the present invention may also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0035] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for real-time acquisition of surrounding rock mechanical parameters based on a TBM airborne drilling system, characterized in that: The following steps are involved: Step S1, providing a TBM onboard drilling system, including a drilling system, a power system, a data monitoring system and a data analysis system; the drilling system includes a pneumatic anchor drill; Step S2, positioning and drilling the surrounding rock through the drilling system and the power system; Step S3, collecting drilling parameters of the pneumatic anchor drill through a data monitoring system, wherein the drilling parameters include rotary head speed, torque, drilling depth, thrust, impact pressure, and impact piston terminal speed; Step S4, calculating the collected drilling parameters through a data analysis system to obtain average values ​​of drilling speed, drill bit speed, thrust, torque, impact pressure and impact power; Step S5, inputting the calculated average values ​​into the BP neural network model trained by the data analysis system to predict the uniaxial compressive strength of the rock; Step S6, selecting the average value of the uniaxial compressive strength of rock obtained by inversion of drilling parameters of all pneumatic anchor drills at the mileage where the TBM airborne drilling system is located as the final surrounding rock mechanical parameters of the mileage.

2. The method according to claim 1, characterized in that In step S1, the data monitoring system includes a rotor speed sensor for collecting the rotor speed of the pneumatic anchor drill, a torque sensor for collecting the torque of the pneumatic anchor drill, a wire-pull displacement sensor for collecting the drilling depth of the pneumatic anchor drill, a pressure sensor for collecting the thrust and impact pressure of the pneumatic anchor drill, and a photoelectric displacement sensor for collecting the final velocity of the impact piston of the pneumatic anchor drill.

3. The method according to claim 2, characterized in that The rotary head speed sensor and the torque sensor are installed at the connection between the drill rod and the main machine; the pressure sensor is installed on the forward and backward hydraulic circuits and the impact circuit of the retreat machine; the wire-pull displacement sensor is installed on the slide rail carrier to record the drill bit stroke of each drilling; the photoelectric displacement sensor is installed near the impact piston.

4. The method according to claim 1, characterized in that In step S4, the impact power is calculated by the following formula: In the formula, P Indicates the impact power, unit kW; E Indicates the impact energy, unit is J; f Indicates the impact frequency, unit Hz; m Indicates the mass of the impact piston, in kg; v m It indicates the final impact velocity of the piston, in m / s.

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