Method and system for eliminating rockburst through excavation blasting energy

Abstract

The invention relates to the technical field of blasting, in particular to a method and system for eliminating rockburst through excavation blasting energy, and a finite element numerical calculation model of a tunnel is constructed through simulation modeling. And then determining the influence of the blasting energy to control the aperture of the gun barrel on the blasting process in the model, and further adjusting the aperture ratio in different directions, thereby realizing the accurate control of the blasting energy, further presplitting the deep surrounding rock, and achieving the purpose of eliminating the risk of rock burst. The blasting energy control gun barrel is designed around the explosive, the hole diameter of one side of the tunnel surrounding rock and the hole diameter of one side of the volley face in the tunnel are adjusted, the spreading direction and strength of the blasting energy are accurately controlled, and therefore the purposes of increasing surrounding rock cracks and reducing the rock burst risk are achieved. According to the method, the rockburst risk can be effectively eliminated, the blasting efficiency can be improved, the construction cost is reduced, and remarkable technical advantages and economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of blasting, in particular to a method and a system for eliminating rock burst by utilizing excavation blasting. Background Art

[0002] With the rapid development of underground engineering, especially the extensive construction of deep rock engineering such as tunnels and mines, rockburst has increasingly become a key constraint on engineering safety and construction efficiency. Rockburst refers to the sudden brittle failure of rock mass due to stress release under high ground stress environment, which is often accompanied by huge energy release and bursting sound, posing a serious threat to the safety of engineering structures and construction personnel. Traditional rockburst prevention and control methods mainly rely on pressure relief, support and monitoring. Although these methods can alleviate the risk of rockburst to a certain extent, they have problems such as complex construction, high cost and unstable effect. Therefore, there is an urgent need for a more efficient, economical and reliable rockburst prevention and control technology.

[0003] Tunnel blasting excavation is a common construction method. Its essence is to detonate explosives in the rock mass to release the explosive energy, thereby achieving the crushing and removal of the rock mass. However, the release of explosive energy is usually uniform and uncontrollable, which not only leads to a large amount of energy waste, but also may aggravate the stress concentration of the surrounding rock and induce rock burst. In recent years, researchers have begun to explore the control of the propagation path of explosive energy by optimizing the blasting design, so as to achieve precise destruction of the rock mass and stress release. However, most of the existing blasting design methods focus on improving blasting efficiency and reducing construction costs, while ignoring the active elimination of rock burst risks during the blasting process. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a method and system for eliminating rock burst by using excavation blasting, so as to solve the problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for eliminating rock burst by utilizing excavation blasting energy of the present invention comprises the following steps:

[0007] Obtain geological information on the tunnel site;

[0008] Constructing a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site;

[0009] Based on the finite element numerical calculation model, determine the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions around the tunnel, wherein the interior of the blasting energy control barrel is hollow and used to load explosives, the first energy release hole and the second energy release hole are respectively located on both sides of the blasting energy control barrel, the first energy release hole faces the tunnel, the second energy release hole faces away from the tunnel, and the aperture of the first energy release hole is smaller than the aperture of the second energy release hole;

[0010] Arrange the blasting energy control barrel at multiple positions based on the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions, and perform surrounding rock blasting based on the blasting energy control barrel at multiple positions.

[0011] In one embodiment of the present application, determining the apertures of the first energy release holes and the apertures and directions of the second energy release holes of the blast energy control barrel at multiple locations around the tunnel based on the finite element numerical calculation model includes:

[0012] The finite element numerical calculation model is simulated to obtain the damage factor distribution characteristics and stress distribution cloud map of the tunnel surrounding rock, wherein the damage factor distribution characteristics include the values ​​of the damage factors at multiple locations, and the stress distribution cloud map includes the ground stress at multiple locations;

[0013] Setting the blasting energy at multiple positions to control the initial aperture and initial direction of the first energy release hole and the initial aperture and initial direction of the second energy release hole of the barrel; and determining the energy release range based on the initial aperture and initial direction of the first energy release hole and the initial aperture and initial direction of the second energy release hole, respectively, wherein the energy release range includes a first energy release range and a second energy release range, and both the first energy release range and the second energy release range are fan-shaped ranges;

[0014] Screen out the positions in the energy discharge range where the value of the damage factor is greater than a preset damage threshold, and obtain the damage range;

[0015] Extracting a high stress concentration area having a stress value greater than a preset stress threshold from the stress distribution cloud map, and aligning the damage range with the high stress concentration area;

[0016] Based on the alignment result of the damage range and the high stress concentration area, the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions.

[0017] In one embodiment of the present application, based on the alignment result of the damage range and the high stress concentration area, the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions, including:

[0018] When the damage range can cover the high stress concentration area, the current aperture and current direction of the first energy release hole and the current aperture and current direction of the second energy release hole are determined as the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole respectively;

[0019] When the damage range cannot cover the high stress concentration area, adjust the current aperture and current direction of the first energy release hole, and the current aperture and current direction of the second energy release hole until the damage range can cover the high stress concentration area, and then determine the current aperture of the first energy release hole and the current aperture of the second energy release hole as the aperture and direction of the first energy release hole, and the aperture and direction of the second energy release hole, respectively.

[0020] In one embodiment of the present application, the mathematical expression of the damage factor is:

[0021]

[0022] Where D is the damage factor, U e is the elastic strain energy of the rock mass after damage, U e0 is the initial elastic strain energy of the rock mass.

[0023] In one embodiment of the present application, it also includes:

[0024] Obtaining the ground stress data of the target stress zone of the tunnel surrounding rock before blasting and after blasting;

[0025] The ground stress data before the blasting and the ground stress data after the blasting are compared. When the ground stress data before the blasting exceeds the target ratio of the ground stress data after the blasting, the parameters of the finite element numerical calculation model, the aperture diameter of the first energy release hole of the blasting-controlled gun barrel, and the aperture diameter of the second energy release hole are determined to be reasonable; when the ground stress data before the blasting does not exceed the target ratio of the ground stress data after the blasting, the parameters of the finite element numerical calculation model, the aperture diameter of the first energy release hole of the blasting-controlled gun barrel, and the aperture diameter of the second energy release hole are adjusted to increase the damage range.

[0026] In one embodiment of the present application, the finite element numerical calculation model is constructed based on a numerical simulation tool.

[0027] In one embodiment of the present application, the blasting energy control barrel is disposed in a blast hole in the surrounding rock surrounding the tunnel.

[0028] The present application also provides a system for eliminating rock bursts by using excavation blasting, comprising:

[0029] An acquisition module is used to obtain geological information of the tunnel site;

[0030] A model building module, used to build a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site;

[0031] an aperture calculation module, for determining the aperture and direction of a first energy release hole and the aperture and direction of a second energy release hole of a blasting energy control barrel at multiple positions around the tunnel based on the finite element numerical calculation model, wherein the interior of the blasting energy control barrel is hollow and used to load explosives, the first energy release hole and the second energy release hole are respectively located on both sides of the blasting energy control barrel, the first energy release hole faces the tunnel, the second energy release hole faces away from the tunnel, and the aperture of the first energy release hole is smaller than the aperture of the second energy release hole;

[0032] The blasting control module is used to arrange the blasting energy control barrel at multiple positions based on the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at the multiple positions, and to perform surrounding rock blasting based on the blasting energy control barrel at the multiple positions.

[0033] The present application also provides an electronic device, comprising: a processor and a memory;

[0034] The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal executes the method as described above.

[0035] The present application also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the above-mentioned method when executed by a processor.

[0036] The beneficial effects of the present invention are as follows: a method and system for eliminating rock bursts by using excavation blasting energy of the present invention constructs a finite element numerical calculation model of a tunnel through simulation modeling. Then, the influence of the aperture and direction of the blasting energy control barrel on the blasting process is determined in the model, and then the aperture ratio in different directions is adjusted to achieve precise control of the explosion energy, and further pre-crack the deep surrounding rock, thereby achieving the purpose of eliminating the risk of rock burst. The present application designs a blasting energy control barrel around the explosives, adjusts the aperture size on one side of the tunnel surrounding rock and one side of the volley surface inside the tunnel, and accurately controls the propagation direction and intensity of the explosion energy, thereby achieving the purpose of increasing the surrounding rock cracks and reducing the risk of rock burst. This method can not only effectively eliminate the risk of rock burst, but also improve blasting efficiency and reduce construction costs, and has significant technical advantages and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0038] Figure 1 is a flow chart of a method for eliminating rock burst by using excavation blasting, shown in one embodiment of the present application;

[0039] Figure 2 This is a schematic diagram of the installation position of the blasting energy control tube in one embodiment of the present application;

[0040] Figure 3 This is a schematic diagram of the structure of an explosive energy control tube in one embodiment of the present application;

[0041] Figure 4 This is a schematic diagram of the stress distribution state of the blasting energy control barrel before and after the action in the first embodiment of the present application;

[0042] Figure 5 Schematic diagram of the energy release range in one embodiment of the present application. DETAILED DESCRIPTION

[0043] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show the layers related to the present invention rather than being drawn according to the number, shape and size of the layers in actual implementation. In actual implementation, the type, quantity and proportion of each layer may be changed arbitrarily, and the layer layout may also be more complicated.

[0045] In the following description, numerous details are discussed to provide a more thorough explanation of embodiments of the present invention; however, it is apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details.

[0046] Figure 1 FIG. 1 is a flow chart of a method for eliminating rock burst by using excavation blasting in one embodiment of the present application. Figure 1 As shown, a method of eliminating rock burst by using excavation blasting in this embodiment may include the following steps:

[0047] (1) Obtain geological information of the tunnel site;

[0048] Among them, the address information may include stratigraphic information: including the type, thickness and distribution of different strata. Lithological characteristics: physical properties (such as density, porosity, etc.) and mechanical properties (such as compressive strength, elastic modulus, etc.) of rocks or soils. Geological structure: the location, occurrence and degree of development of geological discontinuities such as faults and joints.

[0049] (2) constructing a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site;

[0050] In this application, the numerical simulation software ANSYS is used to establish a finite element numerical calculation model, and the surrounding rock adopts an energy-based damage criterion during the calculation process.

[0051] (3) determining the aperture and direction of a first energy release hole and the aperture and direction of a second energy release hole of a blasting energy control barrel at multiple positions around the tunnel based on the finite element numerical calculation model, wherein the interior of the blasting energy control barrel is hollow and used to load explosives, the first energy release hole and the second energy release hole are respectively located on both sides of the blasting energy control barrel, the first energy release hole faces the tunnel, the second energy release hole faces away from the tunnel, and the aperture of the first energy release hole is smaller than the aperture of the second energy release hole;

[0052] Figure 2 FIG. 1 is a schematic diagram of the installation position of the blasting energy control tube in one embodiment of the present application. Figure 2As shown, the core technical solution of this application is to design a blasting energy control barrel around the explosives during tunnel blasting excavation, and adjust the aperture size on one side of the tunnel surrounding rock and one side of the tunnel internal volley surface to achieve precise control of the explosion energy, increase the internal cracks of the surrounding rock, and thus achieve the purpose of eliminating rock bursts. The blasting energy control barrel is set in a blast hole in the surrounding rock surrounding the tunnel.

[0053] Figure 3 FIG. 1 is a schematic diagram of the structure of an explosion energy control tube in an embodiment of the present application. Figure 3 As shown, in this application, a blasting energy control barrel is designed around the explosives. The material of the blasting energy control barrel can be selected from high-strength, high-temperature resistant metal materials, such as stainless steel or titanium alloy, and is composed of two layers of perforated round tubes. The aperture size on one side of the tunnel surrounding rock and one side of the tunnel internal volley surface can be adjusted by rotation. This achieves the function of guiding and controlling the propagation direction of the explosive energy and the proportion of the blasting energy in each direction of the tunnel.

[0054] When detonating explosives, the explosive energy propagates radially around the borehole. Conventional blasting energy acts on the surrounding rock and the stress distribution state is generally uniform. The blasting energy controls the aperture difference between the surrounding rock side and the volley side under the action of the barrel to adjust the energy distribution. The large aperture on the surrounding rock side allows more explosive energy to act directly on the surrounding rock, causing damage and cracks in the deep surrounding rock, reducing the probability of rock bursts; while the small aperture on the volley side ensures the transmission of explosive energy and meets the needs of blasting excavation. Figure 4 This is a schematic diagram of the stress distribution state of the blasting energy control barrel before and after the action in the implementation of this application. Figure 4 The left side shows the stress distribution state before the blasting energy controls the barrel. Figure 4 The right side shows the stress distribution state after the energy-breaking control barrel is applied.

[0055] In the present application, blasting energy is controlled by using the first energy release hole (small aperture) and the first energy release hole (large aperture) of the barrel to distribute the explosive energy. In order to enable the blasting energy to act on the high stress area in the surrounding rock to reduce the subsequent rock burst risk, it is necessary to adjust the aperture and direction of the first energy release hole (small aperture) and the first energy release hole (large aperture) to achieve accurate distribution of the blasting energy.

[0056] In the present application, the process of adjusting the aperture and direction of the first energy discharge hole (small aperture) and the second energy discharge hole (large aperture) includes:

[0057] (3-1) simulating the finite element numerical calculation model to obtain the damage factor distribution characteristics and stress distribution cloud map of the tunnel surrounding rock, wherein the damage factor distribution characteristics include the values ​​of the damage factors at multiple locations, and the stress distribution cloud map includes the ground stress at multiple locations;

[0058] Wherein, the mathematical expression of the damage factor is:

[0059]

[0060] Where D is the damage factor, U e is the elastic strain energy of the rock mass after damage, U e0 is the initial elastic strain energy of the rock mass.

[0061] The damage factor of surrounding rock is usually a parameter used to quantify the degree of damage caused by microcrack expansion, pore change or other forms of structural degradation in rock materials. In the field of rock mechanics and engineering geology, the damage factor is an important indicator for evaluating the degree of internal structural damage of rock media under the influence of external loads or environmental factors. The larger the value of the damage factor, the more susceptible the rock is to damage.

[0062] (3-2) setting the initial aperture and initial direction of the first energy release hole and the initial aperture and initial direction of the second energy release hole of the cannon barrel at multiple positions of blast energy control; and determining the energy release range based on the initial aperture and initial direction of the first energy release hole and the initial aperture and initial direction of the second energy release hole, respectively, wherein the energy release range includes a first energy release range and a second energy release range, and both the first energy release range and the second energy release range are fan-shaped ranges;

[0063] From the structure of the blasting energy control barrel, it can be seen that when the internal explosive explodes, the explosion energy spreads from the inside to the outside, forming a fan-shaped range. This range is the energy discharge range DX. Since there are two energy discharge holes, the first energy discharge range and the second energy discharge range are formed accordingly.

[0064] (3-3) screening out the positions in the energy discharge range where the value of the damage factor is greater than a preset damage threshold, and obtaining a damage range; the damage range includes a first damage range DX2 and a second damage range DX1;

[0065] Within the range of the explosive energy, the damage factors of multiple locations are different. In other words, the locations that are prone to damage are different. Therefore, the locations where the damage factor D is greater than the threshold D0 are screened out to construct the damage range. Within this range, it is inferred that all surrounding rocks will be damaged, thereby releasing the ground stress.

[0066] Figure 5 Schematic diagram of the energy discharge range in one embodiment of the present application. Figure 5 As shown, the present application first uses the model simulation to obtain the curves of multiple damage factors of the tunnel surrounding rock, and uses the threshold D0 to determine and screen out the first damage range DX2 and the second damage range DX1.

[0067] (3-4) extracting a high stress concentration area having a stress value greater than a preset stress threshold from the stress distribution cloud map, and aligning the damage range with the high stress concentration area;

[0068] The purpose of alignment is to see if the area where the in-situ stress is relieved is an area of ​​high stress concentration.

[0069] (3-5) when the damage range can cover the high stress concentration area, the current aperture and current direction of the first energy release hole and the current aperture and current direction of the second energy release hole are respectively determined as the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole;

[0070] (3-6) When the damage range cannot cover the high stress concentration area, adjust the current aperture and current direction of the first energy release hole, and the current aperture and current direction of the second energy release hole until the damage range can cover the high stress concentration area, and then determine the current aperture of the first energy release hole and the current aperture of the second energy release hole as the aperture and direction of the first energy release hole, and the aperture and direction of the second energy release hole, respectively.

[0071] After adjustment, the damage range can cover the high stress concentration area. The damage range effectively covers the high stress concentration area, indicating that the rock damage caused by the explosion stress wave causes the rock mass in the high stress area to rupture, providing a channel for the release of ground stress. The ground stress is released through the cracks, reducing the risk of rock burst. The aperture difference is adjusted by quantifying the damage range and the stress concentration area range, thereby ensuring the reasonable value of the aperture difference α / β on both sides.

[0072] (4) Arranging a plurality of positions of the blasting energy control cannon barrel based on the apertures of the first energy release holes and the apertures of the second energy release holes of the blasting energy control cannon barrel, and performing surrounding rock blasting based on the blasting energy control cannon barrel at the plurality of positions.

[0073] Through the above energy control method, the explosion energy forms a directional crack expansion path in the surrounding rock, increasing the crack density and length of the surrounding rock. The expansion of these cracks effectively releases the stress in the surrounding rock and reduces the risk of rock burst. At the same time, the expansion of the cracks also enhances the self-stabilization ability of the surrounding rock and reduces the difficulty and cost of subsequent support.

[0074] (5) In addition, after the blasting is completed, it can also be optimized in the following ways, including:

[0075] (5-1) Obtaining the ground stress data of the target stress zone of the tunnel surrounding rock before blasting and the ground stress data after blasting;

[0076] (5-2) Compare the geostress data before blasting and the geostress data after blasting. When the geostress data before blasting exceeds the target ratio of the geostress data after blasting, determine that the parameters of the finite element numerical calculation model, the aperture of the first energy release hole of the blasting-controlled cannon barrel, and the aperture of the second energy release hole are reasonable; when the geostress data before blasting does not exceed the target ratio of the geostress data after blasting, adjust the parameters of the finite element numerical calculation model, the aperture of the first energy release hole of the blasting-controlled cannon barrel, and the aperture of the second energy release hole to increase the damage range.

[0077] After each blast, stress sensors are placed in the tunnel surrounding rock, and the measured ground stress value p1 after blasting is compared with the stress value p0 before blasting. If the finite element calculation shows that the damage range covers a high stress area, and the measured p1 in this area is significantly lower than p0, it proves the rationality of evaluating the ground stress release effect by the damage range. On the contrary, if the calculated damage range meets the standard but the measured stress is not effectively reduced, the model parameters or aperture design need to be adjusted to ensure the continuous optimization of the blasting process and the continuous reduction of rock burst risks.

[0078] In summary, the present invention achieves precise control of the explosion energy by arranging the blasting energy control barrel and adjusting the aperture ratio in different directions during the tunnel blasting excavation process, and further pre-splitting the deep surrounding rock, thereby achieving the purpose of eliminating the risk of rock burst. This method not only improves the safety and efficiency of blasting construction, but also provides a new technical approach for rock burst prevention and control in deep rock engineering.

[0079] The present invention discloses a method for eliminating rock bursts by utilizing excavation blasting energy, and constructs a finite element numerical calculation model of a tunnel through simulation modeling. Then, the influence of the aperture and direction of the blasting energy control barrel on the blasting process is determined in the model, and then the aperture ratio in different directions is adjusted to achieve precise control of the explosion energy, and further pre-crack the deep surrounding rock, thereby achieving the purpose of eliminating the risk of rock bursts. The present application designs a blasting energy control barrel around the explosives, adjusts the aperture size on one side of the tunnel surrounding rock and one side of the volley surface inside the tunnel, and precisely controls the propagation direction and intensity of the explosion energy, thereby achieving the purpose of increasing the surrounding rock cracks and reducing the risk of rock bursts. This method can not only effectively eliminate the risk of rock bursts, but also improve blasting efficiency and reduce construction costs, and has significant technical advantages and economic benefits.

[0080] The present application also provides a system for eliminating rock bursts by using excavation blasting, comprising:

[0081] An acquisition module is used to obtain geological information of the tunnel site;

[0082] A model building module, used to build a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site;

[0083] an aperture calculation module, for determining the apertures of a first energy release hole and a second energy release hole of a blasting energy control barrel at multiple positions around the tunnel based on the finite element numerical calculation model, wherein the interior of the blasting energy control barrel is hollow and used to load explosives, the first energy release hole and the second energy release hole are respectively located on both sides of the blasting energy control barrel, the first energy release hole faces the tunnel, the second energy release hole faces away from the tunnel, and the aperture of the first energy release hole is smaller than the aperture of the second energy release hole;

[0084] The blasting control module is used to arrange the blasting energy control barrel at multiple positions based on the apertures of the first energy release holes and the second energy release holes of the blasting energy control barrel at the multiple positions, and to perform surrounding rock blasting based on the blasting energy control barrel at the multiple positions.

[0085] The present invention discloses a system for eliminating rock bursts by utilizing excavation blasting energy, and constructs a finite element numerical calculation model of a tunnel through simulation modeling. Then, the influence of the aperture and direction of the blasting energy control barrel on the blasting process is determined in the model, and then the aperture ratio in different directions is adjusted, so as to achieve precise control of the explosion energy, and further pre-crack the deep surrounding rock, thereby achieving the purpose of eliminating the risk of rock bursts. The present application designs a blasting energy control barrel around the explosives, adjusts the aperture size on one side of the tunnel surrounding rock and one side of the volley surface inside the tunnel, and precisely controls the propagation direction and intensity of the explosion energy, thereby achieving the purpose of increasing the cracks in the surrounding rock and reducing the risk of rock bursts. This method can not only effectively eliminate the risk of rock bursts, but also improve blasting efficiency and reduce construction costs, and has significant technical advantages and economic benefits.

[0086] This embodiment also provides an electronic terminal, including: a processor and a memory;

[0087] The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal executes any one of the methods in this embodiment.

[0088] The computer-readable storage medium in this embodiment can be understood by ordinary technicians in this field: all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to the computer program. The aforementioned computer program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

[0089] The electronic terminal provided in this embodiment includes a processor, a memory, a transceiver and a communication interface. The memory and the communication interface are connected to the processor and the transceiver and complete communication with each other. The memory is used to store computer programs, the communication interface is used to communicate, and the processor and the transceiver are used to run computer programs so that the electronic terminal executes each step of the above method.

[0090] In this embodiment, the memory may include a random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0091] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0092] In the above-mentioned embodiments, although the present invention has been described in conjunction with the specific embodiments of the present invention, many replacements, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The embodiments of the present invention are intended to cover all such replacements, modifications and variations falling within the broad scope of the appended claims.

[0093] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for eliminating rock burst by using excavation blasting, characterized in that: Includes steps: Obtain geological information on the tunnel site; Constructing a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site; Based on the finite element numerical calculation model, determine the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions around the tunnel, wherein the interior of the blasting energy control barrel is hollow and used to load explosives, the first energy release hole and the second energy release hole are respectively located on both sides of the blasting energy control barrel, the first energy release hole faces the tunnel, the second energy release hole faces away from the tunnel, and the aperture of the first energy release hole is smaller than the aperture of the second energy release hole; Arrange the blasting energy control barrel at multiple positions based on the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions, and perform surrounding rock blasting based on the blasting energy control barrel at multiple positions.

2. A method for eliminating rock burst by using excavation blasting energy according to claim 1, characterized in that: Determining the apertures of the first energy release holes and the apertures and directions of the second energy release holes of the blasting energy control barrel at multiple locations around the tunnel based on the finite element numerical calculation model includes: The finite element numerical calculation model is simulated to obtain the damage factor distribution characteristics and stress distribution cloud map of the tunnel surrounding rock, wherein the damage factor distribution characteristics include the values ​​of the damage factors at multiple locations, and the stress distribution cloud map includes the ground stress at multiple locations; Setting the blasting energy at multiple positions to control the initial aperture and initial direction of the first energy release hole and the initial aperture and initial direction of the second energy release hole of the barrel; and determining the energy release range based on the initial aperture and initial direction of the first energy release hole and the initial aperture and initial direction of the second energy release hole, respectively, wherein the energy release range includes a first energy release range and a second energy release range, and both the first energy release range and the second energy release range are fan-shaped ranges; Screen out the positions in the energy discharge range where the value of the damage factor is greater than a preset damage threshold, and obtain the damage range; Extracting a high stress concentration area having a stress value greater than a preset stress threshold from the stress distribution cloud map, and aligning the damage range with the high stress concentration area; Based on the alignment result of the damage range and the high stress concentration area, the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions.

3. A method for eliminating rock burst by using excavation blasting energy according to claim 2, characterized in that: Based on the alignment result of the damage range and the high stress concentration area, the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at multiple positions, including: When the damage range can cover the high stress concentration area, the current aperture and current direction of the first energy release hole and the current aperture and current direction of the second energy release hole are determined as the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole respectively; When the damage range cannot cover the high stress concentration area, adjust the current aperture and current direction of the first energy release hole, and the current aperture and current direction of the second energy release hole until the damage range can cover the high stress concentration area, and then determine the current aperture of the first energy release hole and the current aperture of the second energy release hole as the aperture and direction of the first energy release hole, and the aperture and direction of the second energy release hole, respectively.

4. A method for eliminating rock burst by using excavation blasting energy according to claim 2, characterized in that: The mathematical expression of the damage factor is: Where D is the damage factor, U e is the elastic strain energy of the rock mass after damage, U e0 is the initial elastic strain energy of the rock mass.

5. A method for eliminating rock burst by using excavation blasting energy according to claim 2, characterized in that: Also includes: Obtaining the ground stress data of the target stress zone of the tunnel surrounding rock before blasting and after blasting; The ground stress data before the blasting and the ground stress data after the blasting are compared. When the ground stress data before the blasting exceeds the target ratio of the ground stress data after the blasting, the parameters of the finite element numerical calculation model, the aperture diameter of the first energy release hole of the blasting-controlled gun barrel, and the aperture diameter of the second energy release hole are determined to be reasonable; when the ground stress data before the blasting does not exceed the target ratio of the ground stress data after the blasting, the parameters of the finite element numerical calculation model, the aperture diameter of the first energy release hole of the blasting-controlled gun barrel, and the aperture diameter of the second energy release hole are adjusted to expand the damage range.

6. A method for eliminating rock burst by using excavation blasting energy according to claim 1, characterized in that: The finite element numerical calculation model is constructed based on a numerical simulation tool.

7. A method for eliminating rock burst by using excavation blasting energy according to claim 1, characterized in that: The blasting energy control barrel is disposed in a blast hole in the surrounding rock surrounding the tunnel.

8. A system for eliminating rock bursts by using excavation blasting, characterized in that: include: An acquisition module is used to obtain geological information of the tunnel site; A model building module, used to build a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site; an aperture calculation module, for determining the aperture and direction of a first energy release hole and the aperture and direction of a second energy release hole of a blasting energy control barrel at multiple positions around the tunnel based on the finite element numerical calculation model, wherein the interior of the blasting energy control barrel is hollow and used to load explosives, the first energy release hole and the second energy release hole are respectively located on both sides of the blasting energy control barrel, the first energy release hole faces the tunnel, the second energy release hole faces away from the tunnel, and the aperture of the first energy release hole is smaller than the aperture of the second energy release hole; The blasting control module is used to arrange the blasting energy control barrel at multiple positions based on the aperture and direction of the first energy release hole and the aperture and direction of the second energy release hole of the blasting energy control barrel at the multiple positions, and to perform surrounding rock blasting based on the blasting energy control barrel at the multiple positions.

9. An electronic device, characterized in that: include: Processor and memory; The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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