A method and system for eliminating rock burst using excavation blasting

Abstract

The application relates to the field of blasting technology, and particularly relates to a method and system for eliminating rock burst by using excavation blasting energy, which constructs a finite element numerical calculation model of a tunnel through simulation modeling. Then, the influence of the bore diameter of a blasting energy control barrel on the blasting process is determined in the model, and then the bore diameter ratio in different directions is adjusted, so that the explosion energy is accurately controlled, the deep surrounding rock is further pre-cracked, and the purpose of eliminating the rock burst risk is achieved. The application adjusts the bore diameters of the one side of the tunnel surrounding rock and the one side of the tunnel internal free surface by designing the blasting energy control barrel around the explosive, accurately controls the propagation direction and intensity of the explosion energy, and the purpose of increasing the surrounding rock fissure and reducing the rock burst risk is achieved. The method can not only effectively eliminate the rock burst risk, but also improve the blasting efficiency, reduce the construction cost, and has significant technical advantages and economic benefits.

Description

Technical Field

[0001] This invention relates to the field of blasting technology, specifically a method and system for eliminating rock bursts using excavation and blasting energy. Background Technology

[0002] With the rapid development of underground engineering, especially the widespread construction of deep rock mass engineering projects 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 conditions, often accompanied by a huge energy release and explosive sound, posing a serious threat to the safety of engineering structures and construction personnel. Traditional rockburst prevention methods mainly rely on pressure relief, support, and monitoring. While these methods can mitigate the risk of rockburst to some extent, they suffer from problems such as complex construction, high cost, and unstable effectiveness. Therefore, a more efficient, economical, and reliable rockburst prevention technology is urgently needed.

[0003] Tunnel blasting, a common construction method, essentially involves detonating explosives within rock masses to release their energy, thereby fracturing and removing the rock. However, the release of explosive energy is often uniform and uncontrollable, leading not only to significant energy waste but also potentially exacerbating stress concentration in the surrounding rock and inducing rockbursts. In recent years, researchers have begun exploring ways to control the propagation path of explosive energy through optimized blasting design, thereby achieving precise rock mass destruction and stress release. However, existing blasting design methods largely focus on improving blasting efficiency and reducing construction costs, neglecting the proactive mitigation of rockburst risks during the blasting process. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method and system for eliminating rockbursts using excavation blasting energy, so as to solve the problems in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The present invention provides a method for eliminating rockbursts using excavation and blasting energy, comprising the following steps:

[0007] Obtain geological information at the tunnel site;

[0008] A finite element numerical calculation model of the tunnel was constructed based on the geological information of the tunnel site.

[0009] Based on the finite element numerical calculation model, 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 locations around the tunnel are determined. The blasting energy control barrel is hollow inside and used to fill explosives. The first energy release hole and the second energy release hole are located on both sides of the blasting energy control barrel. The first energy release hole faces the tunnel, and the second energy release hole faces away from the tunnel. The aperture of the first energy release hole is smaller than the aperture of the second energy release hole.

[0010] 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 locations, blasting of surrounding rock is carried out based on the blasting energy control barrel at multiple locations.

[0011] In one embodiment of this application, determining the aperture of the first energy release hole and the aperture and orientation of the second energy release hole of the blasting 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. The damage factor distribution characteristics include the values ​​of damage factors at multiple locations, and the stress distribution cloud map includes the in-situ stress at multiple locations.

[0013] 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 are set for the blast energy control barrel at multiple locations; and the energy release range is determined 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, wherein the energy release range includes the first energy release range and the second energy release range, and both the first energy release range and the second energy release range are fan-shaped ranges;

[0014] The damage range is obtained by filtering out the locations within the energy release range where the damage factor value is greater than a preset damage threshold.

[0015] High stress concentration areas with stress values ​​greater than a preset stress threshold are extracted from the stress distribution cloud map, and the damage range is aligned with the high stress concentration areas;

[0016] Based on the alignment results between the damage range and the high stress concentration zone, the aperture and direction of the first energy release hole and the second energy release hole of the blast energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the second energy release hole of the blast energy control barrel at multiple locations.

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

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

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

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

[0021]

[0022] In the formula, D is the damage factor, and U e U represents the elastic strain energy of the damaged rock mass. e0 This represents the initial elastic strain energy of the rock mass.

[0023] In one embodiment of this application, it further includes:

[0024] Obtain geostress data of the target stress zone in the tunnel surrounding rock before blasting and after blasting;

[0025] The ground stress data before and after the blast are compared. If the ground stress data before the blast exceeds the target proportion of the ground stress data after the blast, the parameters of the finite element numerical calculation model and the diameters of the first and second energy release holes of the blast energy control barrel are determined to be reasonable. If the ground stress data before the blast does not exceed the target proportion of the ground stress data after the blast, the parameters of the finite element numerical calculation model and the diameters of the first and second energy release holes of the blast energy control barrel are adjusted to increase the damage range.

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

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

[0028] This application also provides a system for eliminating rockbursts using excavation blasting energy, comprising:

[0029] The acquisition module is used to acquire geological information at the tunnel site;

[0030] The model building module is used to construct a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site.

[0031] The aperture calculation module is used to determine the aperture and direction of the first energy release hole and the second energy release hole of the blasting energy control barrel at multiple locations around the tunnel based on the finite element numerical calculation model. The blasting energy control barrel is hollow inside and used to fill explosives. The first energy release hole and the second energy release hole are located on both sides of the blasting energy control barrel. The first energy release hole faces the tunnel and the second energy release hole faces away from the tunnel. 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 blasting energy control barrels at multiple locations 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, and to perform surrounding rock blasting based on the blasting energy control barrels at multiple locations.

[0033] This application also provides an electronic device, including: a processor and a memory;

[0034] The memory is used to store computer programs, and the processor is used to execute the computer programs stored in the memory to cause the terminal to perform the methods described above.

[0035] This application also provides a computer-readable storage medium having a computer program stored thereon, characterized in that: when the computer program is executed by a processor, it implements the method described above.

[0036] The beneficial effects of this invention are as follows: This invention provides a method and system for eliminating rockbursts using excavation blasting energy. A finite element numerical calculation model of the tunnel is constructed 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. By adjusting the aperture ratio in different directions, precise control of the explosive energy is achieved, further pre-fractured in the deep surrounding rock, thereby eliminating the risk of rockbursts. This application, by designing a blasting energy control barrel around the explosive and adjusting the aperture size on one side of the tunnel surrounding rock and the side of the tunnel's internal open surface, precisely controls the propagation direction and intensity of the explosive energy, thereby increasing the fissures in the surrounding rock and reducing the risk of rockbursts. This method not only effectively eliminates the risk of rockbursts but also improves blasting efficiency and reduces construction costs, possessing significant technical advantages and economic benefits. Attached Figure Description

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

[0038] Figure 1 This is a flowchart illustrating a method for eliminating rockbursts using excavation blasting energy, as shown in one embodiment of this application;

[0039] Figure 2 This is a schematic diagram showing the installation position of the blast energy control cylinder in one embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the structure of the blast energy control cylinder in one embodiment of this application;

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

[0042] Figure 5 This is a schematic diagram of the energy discharge range in one embodiment of this application. Detailed Implementation

[0043] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the layers related to the present invention and are not drawn according to the actual number, shape and size of the layers in the actual implementation. In the actual implementation, the form, number and proportion of each layer can be arbitrarily changed, and the layer layout may also be more complex.

[0045] Numerous details are explored in the following description to provide a more thorough explanation of embodiments of the invention; however, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details.

[0046] Figure 1 This is a flowchart illustrating a method for eliminating rockbursts using excavation blasting energy, as shown in one embodiment of this application. Figure 1 As shown, a method for eliminating rockbursts using excavation blasting energy in this embodiment may include the following steps:

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

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

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

[0050] In this application, a finite element numerical calculation model is established using the numerical simulation software ANSYS, and an energy-based damage criterion is adopted for the surrounding rock during the calculation process.

[0051] (3) Based on the finite element numerical calculation model, determine the aperture and direction of the first energy release hole and the second energy release hole of the blasting energy control barrel at multiple locations around the tunnel, wherein the blasting energy control barrel is hollow inside and used to fill explosives, the first energy release hole and the second energy release hole are 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 This is a schematic diagram showing the installation position of the explosive energy control cylinder in one embodiment of this application. Figure 2As shown, the core technical solution of this application is to achieve precise control of explosive energy during tunnel blasting excavation by designing a blasting energy control barrel around the explosive and adjusting the aperture size on one side of the tunnel surrounding rock and the other side of the tunnel's internal open surface. This increases the internal fissures of the surrounding rock, thereby eliminating rock bursts. The blasting energy control barrel is installed in the blast holes in the surrounding rock surrounding the tunnel.

[0053] Figure 3 This is a schematic diagram of the blast energy control cylinder in one embodiment of this application, as shown below. Figure 3 As shown in this application, a blast energy control barrel is designed around the explosive. The blast energy control barrel can be made of high-strength, high-temperature resistant metal materials, such as stainless steel or titanium alloy, and consists of two layers of perforated circular tubes. The diameter of the holes on the side of the tunnel surrounding rock and the side of the tunnel interior open surface can be adjusted by rotation. This allows for the guidance and control of the propagation direction of the explosive energy and the proportion of blast energy in each direction of the tunnel.

[0054] When the explosive is detonated, the explosive energy propagates radially outwards along the borehole. In conventional blasting, the stress distribution after the energy acts on the surrounding rock is generally uniform. However, the difference in borehole diameter between the surrounding rock side and the open side under the action of the blasting energy-controlled borehole regulates the energy distribution. The larger borehole diameter on the surrounding rock side allows more explosive energy to act directly on the interior of the surrounding rock, causing damage and fissures in the deeper rock and reducing the probability of rockburst. Meanwhile, the smaller borehole diameter on the open side ensures the transmission of explosive energy, thus meeting the requirements of blasting excavation. Figure 4 This is a schematic diagram showing the stress distribution before and after the action of the blasting energy-controlled barrel in one embodiment of this application. Figure 4 The left side shows the stress distribution state before the blast energy controls the barrel. Figure 4 The right side shows the stress distribution after the energy-breaking control barrel is applied.

[0055] In this application, the first energy release hole (small diameter) and the first energy release hole (large diameter) of the blasting energy control barrel are used to distribute the blasting energy. In order to make the blasting energy act on the high stress area in the surrounding rock and reduce the risk of subsequent rockburst, it is necessary to adjust the diameter and direction of the first energy release hole (small diameter) and the first energy release hole (large diameter) to achieve precise distribution of blasting energy.

[0056] In this application, the process of adjusting the diameter and orientation of the first energy vent (small diameter) and the first energy vent (large diameter) includes:

[0057] (3-1) 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. The damage factor distribution characteristics include the values ​​of damage factors at multiple locations, and the stress distribution cloud map includes the ground stress at multiple locations.

[0058] The mathematical expression for the damage factor is as follows:

[0059]

[0060] In the formula, D is the damage factor, and U e U represents the elastic strain energy of the damaged rock mass. e0 This represents the initial elastic strain energy of the rock mass.

[0061] The damage factor of surrounding rock is a parameter used to quantify the degree of damage to rock materials caused by the propagation of microcracks, changes in porosity, or other forms of structural degradation. In rock mechanics and engineering geology, the damage factor is an important indicator for assessing the degree of internal structural damage to rock media under external loads or environmental factors. The higher the damage factor value, the more susceptible the rock is to damage.

[0062] (3-2) Set 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 blasting energy control barrel at multiple locations; and determine 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 the first energy release range and the second energy release range, and both the first energy release range and the second energy release range are fan-shaped ranges;

[0063] Based on the structure of the blast energy-controlled barrel, it can be seen that when the internal explosive detonates, the explosive energy diffuses from the inside out, forming a fan-shaped area. This area is the energy release range DX. Since there are two energy release holes, a first energy release range and a second energy release range are correspondingly formed.

[0064] (3-3) Filter out the positions in the energy release range where the value of the damage factor is greater than the preset damage threshold to obtain the damage range; the damage range includes the first damage range DX2 and the second damage range DX1.

[0065] Within the sphere of influence of the explosion energy, the damage factor differs at various locations. In other words, the locations most susceptible to damage vary. Therefore, locations where the damage factor D is greater than the threshold D0 are selected to construct a damage range. Within this range, it is inferred that all surrounding rock will experience damage, thereby releasing in-situ stress.

[0066] Figure 5 This is a schematic diagram of the energy discharge range in one embodiment of this application, as shown below. Figure 5 As shown, this application first uses model simulation to obtain 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) Extract the high stress concentration area with stress value greater than the preset stress threshold from the stress distribution cloud map, and align the damage range with the high stress concentration area;

[0068] The purpose of alignment is to check whether the area where the ground stress is released is a high stress concentration area.

[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 venting hole and the current aperture and current direction of the second energy venting hole until the damage range can cover the high stress concentration area. Then, determine the current aperture of the first energy venting hole and the current aperture of the second energy venting hole as the aperture and direction of the first energy venting hole and the aperture and direction of the second energy venting hole, respectively.

[0071] After adjustments, the damage range effectively covers the high-stress concentration area. This indicates that the rock mass damage induced by the explosive stress wave causes fracturing in the high-stress area, providing a channel for stress release. The stress is released through the fissures, reducing the risk of rockburst. By quantifying the damage range and the stress concentration area, the aperture difference is adjusted to ensure a reasonable value for the aperture difference α / β on both sides.

[0072] (4) Based on the aperture of the first energy release hole and the aperture of the second energy release hole of the blasting energy control barrel at the multiple locations, blasting energy control barrels at multiple locations are arranged at multiple locations, and surrounding rock blasting is carried out based on the blasting energy control barrels at multiple locations.

[0073] Through the aforementioned energy control methods, the explosive energy creates directional fracture propagation paths within the surrounding rock, increasing the fracture density and length. This fracture propagation effectively releases stress within the surrounding rock, reducing the risk of rockburst. Simultaneously, the fracture propagation enhances the self-stabilizing capacity of the surrounding rock, reducing the difficulty and cost of subsequent support.

[0074] (5) In addition, after the blasting is completed, optimization can be carried out in the following ways, including:

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

[0076] (5-2) Compare the ground stress data before and after the blast. If the ground stress data before the blast exceeds the target ratio of the ground stress data after the blast, determine that the parameters of the finite element numerical calculation model, the aperture of the first energy release hole and the aperture of the second energy release hole of the blast energy control barrel are reasonable. If the ground stress data before the blast does not exceed the target ratio of the ground stress data after the blast, adjust the parameters of the finite element numerical calculation model, the aperture of the first energy release hole and the aperture of the second energy release hole of the blast energy control barrel to increase the damage range.

[0077] After each blast, stress sensors are placed in the surrounding rock of the tunnel. The measured 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 that area is significantly lower than p0, then the rationality of assessing the stress release effect through the damage range is proven. Conversely, 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 continuous optimization of the blasting process and continuous reduction of rockburst risk.

[0078] In summary, this invention achieves precise control of explosive energy by arranging blasting energy control barrels and adjusting the aperture ratios in different directions during tunnel blasting excavation. This further enables pre-fracture of the deep surrounding rock, thereby eliminating the risk of rockburst. This method not only improves the safety and efficiency of blasting operations but also provides a new technical approach for rockburst prevention in deep rock engineering.

[0079] This invention discloses a method for eliminating rockburst using excavation blasting energy. A finite element numerical model of the tunnel is constructed through simulation modeling. The influence of the aperture and direction of the blasting energy control barrel on the blasting process is then determined within the model. By adjusting the aperture ratio in different directions, precise control of the explosive energy is achieved, further pre-fractured in the deep surrounding rock, thereby eliminating the risk of rockburst. This application, by designing a blasting energy control barrel around the explosive and adjusting the aperture size on one side of the tunnel surrounding rock and the other side of the tunnel's internal open surface, precisely controls the propagation direction and intensity of the explosive energy, thereby increasing the fissures in the surrounding rock and reducing the risk of rockburst. This method not only effectively eliminates the risk of rockburst but also improves blasting efficiency and reduces construction costs, demonstrating significant technical advantages and economic benefits.

[0080] This application also provides a system for eliminating rockbursts using excavation blasting energy, comprising:

[0081] The acquisition module is used to acquire geological information at the tunnel site;

[0082] The model building module is used to construct a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site.

[0083] An aperture calculation module is used to determine the aperture of the first energy release hole and the aperture of the second energy release hole of the blasting energy control barrel at multiple locations around the tunnel based on the finite element numerical calculation model. The blasting energy control barrel is hollow inside and used to fill explosives. The first energy release hole and the second energy release hole are located on both sides of the blasting energy control barrel. The first energy release hole faces the tunnel, and the second energy release hole faces away from the tunnel. 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 blasting energy control barrels at multiple locations based on the aperture of the first energy release hole and the aperture of the second energy release hole of the blasting energy control barrel at multiple locations, and to perform surrounding rock blasting based on the blasting energy control barrels at multiple locations.

[0085] This invention discloses a system for eliminating rockburst using excavation blasting energy. A finite element numerical model of the tunnel is constructed through simulation modeling. The influence of the aperture and direction of the blasting energy control barrel on the blasting process is then determined within the model. By adjusting the aperture ratio in different directions, precise control of the explosive energy is achieved, further pre-fractured in the deep surrounding rock, thereby eliminating the risk of rockburst. This application, by designing a blasting energy control barrel around the explosive and adjusting the aperture size on one side of the tunnel surrounding rock and the other side of the tunnel's internal open surface, precisely controls the propagation direction and intensity of the explosive energy, thereby increasing the fissures in the surrounding rock and reducing the risk of rockburst. This method not only effectively eliminates the risk of rockburst but also improves blasting efficiency and reduces construction costs, demonstrating 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 computer programs, and the processor is used to execute the computer programs stored in the memory so that the terminal performs any of the methods in this embodiment.

[0088] As will be understood by those skilled in the art, the computer-readable storage medium described in this embodiment allows for the implementation of all or part of the steps in the above method embodiments by computer program-related hardware. The aforementioned computer program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[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 between them. The memory is used to store computer programs, the communication interface is used to perform communication, and the processor and the transceiver are used to run the computer programs, so that the electronic terminal performs the steps of the above method.

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

[0091] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0092] In the above embodiments, although the invention has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. The embodiments of the invention are intended to cover all such substitutions, 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 invention. Any person skilled in the art can 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 those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for eliminating rockbursts using excavation and blasting energy, characterized in that, Including the following steps: Obtain geological information at the tunnel site; A finite element numerical calculation model of the tunnel was constructed based on the geological information of the tunnel site. Based on the finite element numerical calculation model, the aperture and direction of the first energy release hole and the second energy release hole of the blasting energy control barrel at multiple locations around the tunnel are determined. The blasting energy control barrel is hollow and used for loading explosives. The first and second energy release holes are located on opposite sides of the blasting energy control barrel, with the first energy release hole facing the tunnel and the second energy release hole facing away from the tunnel. The aperture of the first energy release hole is smaller than that of the second energy release hole. Determining the aperture and direction of the first and 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: simulating the finite element numerical calculation model to obtain the damage factor distribution characteristics and stress distribution cloud map of the tunnel surrounding rock. The damage factor distribution characteristics include the values ​​of damage factors at multiple locations, and the stress distribution cloud map includes the ground stress at multiple locations. 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 are set for multiple locations of the blast energy control barrel. Based on the initial aperture and initial direction of the first and second energy release holes, the energy release range is determined, wherein the energy release range includes a first energy release range and a second energy release range, both of which are fan-shaped ranges. Locations within the energy release range where the damage factor value is greater than a preset damage threshold are selected to obtain the damage range. High stress concentration areas with stress values ​​greater than a preset stress threshold are extracted from the stress distribution cloud map, and the damage range is aligned 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 second energy release hole of the blast energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the second energy release hole for multiple locations of the blast energy control barrel. 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 locations, blasting of surrounding rock is carried out based on the blasting energy control barrel at multiple locations.

2. The method for eliminating rockbursts using excavation and blasting energy according to claim 1, characterized in that, Based on the alignment of the damage area with the high stress concentration zone, the aperture and direction of the first energy release hole and the second energy release hole of the blast energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the second energy release hole at multiple locations, including: When the damage range can cover the high stress concentration area, the current aperture and current direction of the first energy venting hole and the current aperture and current direction of the second energy venting hole are respectively determined as the aperture and direction of the first energy venting hole and the aperture and direction of the second energy venting hole. When the damage range cannot cover the high stress concentration area, adjust the current aperture and current direction of the first energy venting hole and the current aperture and current direction of the second energy venting hole until the damage range can cover the high stress concentration area. Then, determine the current aperture of the first energy venting hole and the current aperture of the second energy venting hole as the aperture and direction of the first energy venting hole and the aperture and direction of the second energy venting hole, respectively.

3. The method for eliminating rockbursts using excavation and blasting energy according to claim 1, characterized in that, The mathematical expression for the damage factor is: In the formula, As a damage factor, This refers to the elastic strain energy of the damaged rock mass. This represents the initial elastic strain energy of the rock mass.

4. The method for eliminating rockbursts using excavation and blasting energy according to claim 1, characterized in that, Also includes: Obtain geostress data of the target stress zone in the tunnel surrounding rock before blasting and after blasting; The ground stress data before and after the blast are compared. If the ground stress data before the blast exceeds the target ratio of the ground stress data after the blast, the parameters of the finite element numerical calculation model and the apertures of the first and second energy release holes of the blast energy control barrel are determined to be reasonable. If the ground stress data before the blast does not exceed the target ratio of the ground stress data after the blast, the parameters of the finite element numerical calculation model and the apertures of the first and second energy release holes of the blast energy control barrel are adjusted to expand the damage range.

5. A method for eliminating rockbursts using excavation and blasting energy according to claim 1, characterized in that, The finite element numerical calculation model is constructed based on numerical simulation tools.

6. The method for eliminating rockbursts using excavation and blasting energy according to claim 1, characterized in that, The blasting energy control barrel is installed in a blast hole in the surrounding rock of the tunnel.

7. A system for eliminating rockbursts using excavation and blasting energy, characterized in that, include: The acquisition module is used to acquire geological information at the tunnel site; The model building module is used to construct a finite element numerical calculation model of the tunnel based on the geological information of the tunnel site. The aperture calculation module is used to determine the aperture and direction of the first energy release hole and the second energy release hole of the blasting energy control barrel at multiple locations around the tunnel based on the finite element numerical calculation model. The blasting energy control barrel is hollow and used for loading explosives. The first and second energy release holes are located on opposite sides of the blasting energy control barrel, with the first energy release hole facing the tunnel and the second energy release hole facing away from the tunnel. The aperture of the first energy release hole is smaller than that of the second energy release hole. Determining the aperture and direction of the first and 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: simulating the finite element numerical calculation model to obtain the damage factor distribution characteristics and stress distribution cloud map of the tunnel surrounding rock. The damage factor distribution characteristics include the values ​​of damage factors at multiple locations, and the stress distribution cloud map includes the ground stress at multiple locations. 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 are set for multiple locations of the blast energy control barrel. Based on the initial aperture and initial direction of the first and second energy release holes, the energy release range is determined, wherein the energy release range includes a first energy release range and a second energy release range, both of which are fan-shaped ranges. Locations within the energy release range where the damage factor value is greater than a preset damage threshold are selected to obtain the damage range. High stress concentration areas with stress values ​​greater than a preset stress threshold are extracted from the stress distribution cloud map, and the damage range is aligned 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 second energy release hole of the blast energy control barrel are adjusted to obtain the aperture and direction of the first energy release hole and the second energy release hole for multiple locations of the blast energy control barrel. The blasting control module is used to arrange blasting energy control barrels at multiple locations 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, and to perform surrounding rock blasting based on the blasting energy control barrels at multiple locations.

8. 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 to cause the electronic device to perform the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 6.

Images