Method and device for controlling blasting vibration-induced time-delay rockburst based on microseismic events

Abstract

The present invention provides a method and device for controlling time-lag rockburst induced by blasting vibration based on microseismic events, and relates to the technical field of tunnel blasting. The method comprises: conducting a blasting test on a test surrounding rock, obtaining microseismic event data before blasting, microseismic event data after blasting, and blasting vibration velocity of the test surrounding rock; obtaining event increments and event positions of surrounding rock fracture induced by blasting vibration; dividing surrounding rock damage levels, and calculating blasting vibration thresholds for each surrounding rock damage level according to blasting vibration velocity; optimizing blasting control parameters according to the surrounding rock damage level; blasting actual surrounding rock through optimized blasting control parameters, and judging the time-lag rockburst risk of the actual surrounding rock after blasting according to the blasting vibration threshold. The present invention solves the problem that the existing blasting vibration monitoring cannot intuitively express surrounding rock fracture, and its vibration control standard is set according to empirical values, and the control thresholds for different rock types and different situations are not accurate enough.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel blasting, and in particular to a method and device for controlling time-delay rockburst induced by blasting vibration based on microseismic events. Background Art

[0002] With the continuous development of transportation in my country, the demand for deep engineering construction is also increasing; in the field of tunnel construction, its technical means mainly include mechanical excavation and drilling and blasting. Whether from the economic point of view or the excavation efficiency, drilling and blasting plays an irreplaceable role in the tunnel excavation process. Therefore, most tunnel construction still adopts drilling and blasting. With the continuous construction of deep rock engineering, the blasting vibration generated during the blasting construction process can easily cause the rupture of the adjacent tunnel surrounding rock, and then trigger a time-lag rockburst disaster. However, blasting vibration monitoring cannot intuitively express the rock fracture, and its vibration control standard is set according to empirical values. The control threshold for different rock types and different situations is not accurate enough. Therefore, in response to the above problems, the present invention proposes a blasting vibration-induced time-lag rockburst control method and device based on microseismic events. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and device for controlling time-delay rockbursts induced by blasting vibrations based on microseismic events to improve the above-mentioned problems. To achieve the above-mentioned purpose, the technical solutions adopted by the present invention are as follows:

[0004] In a first aspect, the present application provides a method for controlling time-delay rockburst induced by blasting vibration based on microseismic events, comprising:

[0005] Performing a blasting test on a test surrounding rock to obtain first information and second information of the test surrounding rock, wherein the first information includes microseismic event data before and after the blasting of the test surrounding rock, and the second information includes blasting vibration velocity;

[0006] Acquire third information according to the first information, the third information including an event increment and an event location of surrounding rock fracture induced by blasting vibration;

[0007] Classify surrounding rock damage levels according to the third information, and calculate the blasting vibration threshold of each surrounding rock damage level according to the second information;

[0008] Optimizing blasting control parameters according to the surrounding rock damage level;

[0009] The actual surrounding rock is blasted using the optimized blasting control parameters, and the time-delay rockburst risk of the actual surrounding rock after the blasting is determined based on the blasting vibration threshold.

[0010] In a second aspect, the present application also provides a blasting vibration-induced time-lag rockburst control device based on microseismic events, comprising:

[0011] a first acquisition module, configured to perform a blasting test on a test surrounding rock to acquire first information and second information of the test surrounding rock, wherein the first information includes microseismic event data before and after the blasting of the test surrounding rock, and the second information includes blasting vibration velocity;

[0012] a second acquisition module, configured to acquire third information according to the first information, wherein the third information includes an event increment and an event position of surrounding rock fracture induced by blasting vibration;

[0013] a calculation module, configured to classify surrounding rock damage levels according to the third information, and calculate a blasting vibration threshold for each surrounding rock damage level according to the second information;

[0014] an optimization module, configured to optimize blasting control parameters according to the surrounding rock damage level;

[0015] The judgment module is used to blast the actual surrounding rock using the optimized blasting control parameters, and judge the time-lag rockburst risk of the actual surrounding rock after blasting according to the blasting vibration threshold.

[0016] The beneficial effects of the present invention are:

[0017] The present invention solves the problem of inaccurate blasting safety thresholds by combining microseismic event monitoring with blasting vibration monitoring. It also assesses and controls the risk of blasting-induced time-lag rockbursts, and further accurately sets the blasting vibration threshold based on the event increment of surrounding rock fractures induced by blasting vibration. Furthermore, the event increment is used to classify surrounding rock damage levels under blasting vibration, and blasting plans are optimized based on these levels to ensure tunnel construction safety and progress. The present invention not only provides a scientific basis for the grading and evaluation of surrounding rock fracture damage induced by blasting vibration, but also provides different blasting plan optimization strategies for different levels of surrounding rock damage induced by blasting vibration, thereby reducing the occurrence of time-lag rockburst disasters in deep tunnels and ensuring the quality and safety of the blasting construction process.

[0018] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be learned by practicing embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1Schematic diagram of the flow of a method for controlling time-delay rockburst induced by blasting vibration based on microseismic events according to an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of multiple monitoring areas in adjacent tunnels according to an embodiment of the present invention;

[0022] Figure 3 : is a relationship diagram between the event increment of surrounding rock fracture induced by blasting vibration and the surrounding rock damage level in an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the structure of a blasting vibration-induced time-lag rockburst control device based on microseismic events according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0026] Example 1:

[0027] This embodiment provides a method for controlling time-delay rockburst induced by blasting vibration based on microseismic events.

[0028] See also Figure 1 , the figure shows that the method includes step S100, step S200, step S300, step S400, and step S500.

[0029] Step S100: performing a blasting test on a test surrounding rock to obtain first information and second information of the test surrounding rock, wherein the first information includes microseismic event data before and after the blasting of the test surrounding rock, and the second information includes blasting vibration velocity;

[0030] In this embodiment, the actual surrounding rock refers to the surrounding rock of the tunnel to be blasted, and the test surrounding rock refers to the surrounding rock of a tunnel adjacent to the tunnel to be blasted.

[0031] The step S100 includes:

[0032] Step S101: Arrange multiple microseismic sensors and blasting vibration sensors around the test surrounding rock;

[0033] Step S102: Divide the test surrounding rock into multiple monitoring areas;

[0034] In this embodiment, multiple monitoring areas are divided into adjacent tunnels, such as Figure 2 The following is a schematic diagram of an adjacent tunnel. Figure 2 The five monitoring areas are divided into I, II, III, IV and V.

[0035] Step S103: performing a blasting test on the test surrounding rock, obtaining microseismic events of the test surrounding rock through a microseismic sensor, and obtaining blasting vibration velocity through a blasting vibration sensor, wherein the microseismic events include blasting events, surrounding rock fracture events, and noise interference events;

[0036] In this embodiment, before the blasting test of the adjacent tunnel, that is, before the blasting construction, a blasting vibration sensor is installed on the blasting side wall of the adjacent tunnel, and a total of 8 microseismic sensors are installed at 60m and 90m behind the tunnel face.

[0037] Specifically, 60m behind the adjacent tunnel face, a microseismic sensor is installed on each side wall, and two meters in front of the two side spans. A microseismic sensor is installed 90m behind the adjacent tunnel face. The setting method adopts left-right symmetrical - front-back setting, with one microseismic sensor on each side wall and one microseismic sensor on each side spans two meters in front.

[0038] Step S104: performing data analysis on the microseismic events to obtain microseismic event data before blasting and microseismic event data after blasting of the test surrounding rock.

[0039] Step S200: obtaining third information according to the first information, wherein the third information includes an event increment and an event location of surrounding rock fracture induced by blasting vibration;

[0040] The step S200 includes:

[0041] Step S201: screening the first information to obtain a waveform of a surrounding rock fracture event before blasting and a waveform of a surrounding rock fracture event after blasting;

[0042] In this embodiment, blasting events, surrounding rock fracture events, and noise interference events are screened based on waveform characteristics to obtain waveforms for surrounding rock fracture events before and after blasting. The blasting event waveform exhibits multiple peaks, and these peaks coincide with the timing of the staged blasting detonations. The noise interference event waveform lacks distinct peaks and exhibits irregular ups and downs. The surrounding rock fracture event waveform exhibits only one waveform, which exhibits a right-angled triangle characteristic, showing a sudden increase followed by a rapid decay. Furthermore, the microseismic events before and after blasting are distinguished based on blasting time.

[0043] Step S202: performing event location on the waveform of the surrounding rock rupture event before blasting and the waveform of the surrounding rock rupture event after blasting to obtain the positions of the surrounding rock rupture event before blasting and the positions of the surrounding rock rupture event after blasting, wherein the event location adopts a PSO-layered location algorithm;

[0044] Step S203: obtaining the event location of surrounding rock fracture induced by blasting vibration according to the event location of surrounding rock fracture before blasting and the event location of surrounding rock fracture after blasting;

[0045] Step S204: performing regional screening on the event locations of surrounding rock fracture induced by the blasting vibration to obtain the number of pre-blasting fracture events and the number of post-blasting fracture events in multiple monitoring areas;

[0046] Step S205: Calculate the event increment of surrounding rock fracture induced by blasting vibration in each monitoring area according to the number of surrounding rock fracture events before blasting and the number of surrounding rock fracture events after blasting.

[0047] In this embodiment, as shown in Table 1, it is a table of blasting vibration velocities and event increments of surrounding rock fracture induced by blasting vibration measured in five monitoring areas.

[0048] Table 1 Blasting vibration velocity and event increment of surrounding rock fracture induced by blasting vibration

[0049]

[0050] Step S300: Classifying surrounding rock damage levels according to the third information, and calculating the blasting vibration threshold of each surrounding rock damage level according to the second information;

[0051] The step S300 includes:

[0052] Step S301: numerically simulate the test surrounding rock to obtain a classification threshold;

[0053] In this embodiment, the classification threshold can be calculated by numerical simulation, wherein the steps of obtaining the classification threshold include:

[0054] Step A100: Obtain tunnel parameter information, wherein the parameter information includes tunnel size information, location information, burial depth information, thickness information of interbedded rock in adjacent tunnels, and ground stress information.

[0055] Step A200: Based on the parameter information, a numerical analysis model of the tunnel is established using a fluid-solid coupling method.

[0056] The specific steps for establishing the numerical analysis model are as follows:

[0057] Based on the parameter information, a numerical model of a double-track single-hole tunnel is established using the fluid-solid coupling method, and the material parameters of each part in the numerical model are set, including the material parameters of rock, air, and explosives.

[0058] The numerical model is meshed using solid element hexahedral meshes. The top surface of the numerical model is set as a free boundary, and the other surfaces are set as non-reflecting boundary conditions. The purpose of setting the non-reflecting boundary conditions is to prevent the blasting seismic waves from reflecting on the boundaries.

[0059] A constant stress solid unit is set for the surrounding rock in the numerical model, and the surrounding rock and air are bound in the same unit.

[0060] In this embodiment, since the explosion time is very short and a strong shock wave is generated in an instant, thereby impacting and damaging surrounding objects, and the air and explosives are greatly deformed during the explosion, the surrounding rock and air are bound into one unit.

[0061] The interaction among rock, explosive and air is coupled using the fluid-solid coupling common node method to obtain a numerical analysis model.

[0062] Step A300: After inputting the material parameter equation into the numerical analysis model, blasting simulation is performed to obtain the surrounding rock fracture and surrounding rock damage in the monitoring area under tunnel blasting. The surrounding rock damage is calculated by the damage factor of the rock unit in the numerical analysis model.

[0063] In this embodiment, the damage factor of the complete unit is Defined as 0, for the damage factor of the failed unit, if 0 < ≤0.2 is minor damage, if 0.2< ≤0.4 is low damage, if 0.4< ≤0.6 is moderate damage. >0.6 indicates high damage.

[0064] The calculation formula of damage factor is:

[0065] ;

[0066] ;

[0067] Where, represents the damage factor, represents the linear softening slope, represents the effective tensile strain, represents the characteristic length of the crack tip of the failed unit, represents the maximum tensile stress, It represents the internal energy generated by the fracture after the material unit fails.

[0068] Step A400: Establish a classification threshold based on surrounding rock fracture conditions under different surrounding rock damage conditions.

[0069] Step S302: Classifying surrounding rock damage levels according to the classification threshold, wherein the surrounding rock damage levels include slight damage, low damage, medium damage, and high damage;

[0070] In this embodiment, the grading threshold includes a first threshold, a second threshold, and a third threshold, wherein the first threshold represents the threshold for minor damage and low damage, the second threshold represents the threshold for low damage and medium damage, and the third threshold represents the threshold for medium damage and high damage. Figure 3 The figure shows the relationship between the event increment of surrounding rock fracture induced by blasting vibration and the surrounding rock damage level, where represents the first threshold, represents the second threshold, Indicates the third threshold.

[0071] Step S303: determining the surrounding rock damage level of each monitoring area of ​​the test surrounding rock according to the increment of events of surrounding rock fracture induced by blasting vibration in each monitoring area;

[0072] Step S304: Select two monitoring areas of adjacent surrounding rock damage levels respectively, and calculate the blasting vibration threshold of each surrounding rock damage level according to the classification threshold, the blasting vibration velocity and the event increment of the two adjacent monitoring areas.

[0073] In this embodiment, the calculation formula of the blasting vibration threshold is:

[0074] ;

[0075] Where, represents the increment of events of surrounding rock fracture induced by blasting vibration in monitoring area B, represents the increment of events of surrounding rock fracture induced by blasting vibration in monitoring area A, Indicates the blasting vibration velocity monitored in monitoring area B, Indicates the blasting vibration velocity monitored in monitoring area A, represents the classification threshold, Indicates the classification threshold The corresponding blasting vibration threshold.

[0076] Step S400: optimizing blasting control parameters according to the surrounding rock damage level;

[0077] The step S400 includes:

[0078] Step S401: Determine the damage level of the surrounding rock in each monitoring area of ​​the test surrounding rock. If the monitoring area is slightly damaged, the blasting control parameters remain unchanged.

[0079] Step S402: If the monitoring area is low-damage, optimizing the detonation mode in the blasting control parameters of the monitoring area;

[0080] Step S403: If the monitoring area is moderately damaged, optimizing the controlled charge amount in the blasting control parameters of the monitoring area;

[0081] Step S404: If the monitoring area is highly damaged, the blasting construction method in the blasting control parameters of the monitoring area is optimized.

[0082] In this embodiment, as shown in Table 2, it is an optimization comparison table of surrounding rock damage level and blasting control parameters, where: represents the increment of events of surrounding rock fracture induced by blasting vibration, represents the first threshold, represents the second threshold, Indicates the third threshold.

[0083] Table 2 Comparison table of surrounding rock damage level and blasting control parameter optimization

[0084]

[0085] As shown in Table 2, if it is judged to be minor damage, that is, there is no risk of rock burst triggering, the original blasting plan is still used for blasting.

[0086] If it is judged to be low damage, it is easy to cause minor rock burst. The blasting plan is mainly to optimize the detonation method, make full use of the advantages of precise delay of electronic detonators, perform single-hole continuous detonation on the slot holes, use segmented and zoned delayed detonation for auxiliary holes, and use smooth blasting for peripheral holes to reduce the damage of blasting to the surrounding rock.

[0087] If it is judged to be moderate damage, the blasting plan needs to be optimized and improved, and the optimization should be made from the aspect of controlling the charge amount. The charge amount should be controlled on the basis of delayed detonation using electronic detonators, and a reasonable linear density should be adopted strictly according to the surrounding rock classification.

[0088] If the damage is judged to be high, the risk of triggering a rockburst is high, i.e., a strong or extremely strong rockburst. For high rock mass damage, improvements to blasting methods are necessary. These methods mainly include benching, double-sidewall pilot tunneling, and core soil retention.

[0089] Step S500: blasting the actual surrounding rock using the optimized blasting control parameters, and determining the time-lag rockburst risk of the actual surrounding rock after blasting based on the blasting vibration threshold.

[0090] The step S500 includes:

[0091] Step S501: blasting the actual surrounding rock using the optimized blasting control parameters;

[0092] Step S502: obtaining the blasting vibration velocity value of the actual surrounding rock after blasting;

[0093] Step S503: comparing the blasting vibration threshold with the actual blasting vibration velocity value of the surrounding rock to obtain the actual surrounding rock damage level;

[0094] In this embodiment, by comparing the actual blasting vibration velocity value of the surrounding rock with the blasting vibration threshold, the judgment of the surrounding rock damage level can be simplified without recalculating the event increment. The judgment step is simplified by the blasting vibration velocity.

[0095] Step S504: judging the time-lag rockburst risk of the actual surrounding rock after blasting based on the surrounding rock damage level of the actual surrounding rock, wherein the time-lag rockburst risk includes no rockburst, slight rockburst, moderate rockburst and severe rockburst.

[0096] In this embodiment, the actual surrounding rock is divided into monitoring areas, that is, the monitoring areas of the tunnel to be blasted are divided. Then, after the tunnel to be blasted is blasted, the blasting vibration velocity value of each monitoring area is obtained, and the blasting vibration velocity value is compared with the blasting vibration threshold to obtain the surrounding rock damage level and rockburst risk.

[0097] The specific judgment criteria are shown in Table 3, where: Indicates the actual blasting vibration velocity value of the surrounding rock, represents the blasting vibration threshold corresponding to the first threshold, represents the blasting vibration threshold corresponding to the second threshold, Indicates the blasting vibration threshold corresponding to the third threshold.

[0098] Table 3 Time-delay rockburst risk assessment table

[0099]

[0100] In summary, this method accurately describes surrounding rock fracture conditions through microseismic monitoring and establishes the surrounding rock damage level for blast-induced rock fracture, providing clear guidance for subsequent work. By combining this with the blasting vibration velocity, the blasting vibration thresholds for different surrounding rock damage levels are further refined, allowing rapid assessment of the risk of time-delayed rockbursts using this threshold.

[0101] The method of the present invention not only has guiding significance for current tunnel construction, but also can provide a reference for similar projects in the future, especially in the prevention and treatment of time-delay rockbursts caused by blasting. The data and experience accumulated through the research of this method can provide a scientific basis for the safe construction and long-term stable operation of tunnel projects.

[0102] Example 2:

[0103] like Figure 4 As shown, this embodiment provides a blasting vibration-induced time-lag rockburst control device based on microseismic events, the device comprising:

[0104] a first acquisition module, configured to perform a blasting test on a test surrounding rock to acquire first information and second information of the test surrounding rock, wherein the first information includes microseismic event data before and after the blasting of the test surrounding rock, and the second information includes blasting vibration velocity;

[0105] a second acquisition module, configured to acquire third information according to the first information, wherein the third information includes an event increment and an event position of surrounding rock fracture induced by blasting vibration;

[0106] a calculation module, configured to classify surrounding rock damage levels according to the third information, and calculate a blasting vibration threshold for each surrounding rock damage level according to the second information;

[0107] an optimization module, configured to optimize blasting control parameters according to the surrounding rock damage level;

[0108] The judgment module is used to blast the actual surrounding rock using the optimized blasting control parameters, and judge the time-lag rockburst risk of the actual surrounding rock after blasting according to the blasting vibration threshold.

[0109] The first acquisition module includes:

[0110] Arrangement unit, used for arranging multiple microseismic sensors and blasting vibration sensors around the test surrounding rock;

[0111] A first division unit is used to divide the test surrounding rock into multiple monitoring areas;

[0112] a first acquisition unit, configured to perform a blasting test on the test surrounding rock, acquire microseismic events of the test surrounding rock through a microseismic sensor, and acquire blasting vibration velocity through a blasting vibration sensor, wherein the microseismic events include blasting events, surrounding rock fracture events, and noise interference events;

[0113] The analysis unit is used to perform data analysis on the microseismic events to obtain microseismic event data before blasting and microseismic event data after blasting of the test surrounding rock.

[0114] The second acquisition module includes:

[0115] a first screening unit, configured to screen the first information to obtain a surrounding rock rupture event waveform before blasting and a surrounding rock rupture event waveform after blasting;

[0116] a positioning unit, configured to perform event positioning on the waveform of the surrounding rock rupture event before blasting and the waveform of the surrounding rock rupture event after blasting, to obtain the position of the surrounding rock rupture event before blasting and the position of the surrounding rock rupture event after blasting, wherein the event positioning adopts a PSO-layered positioning algorithm;

[0117] a second acquiring unit, configured to acquire an event location of surrounding rock fracture induced by blasting vibration according to the event location of surrounding rock fracture before blasting and the event location of surrounding rock fracture after blasting;

[0118] The second screening unit is used to perform regional screening on the event locations of the blasting vibration-induced surrounding rock fracture, and obtain the number of pre-blasting fracture events and the number of post-blasting fracture events in multiple monitoring areas;

[0119] The first calculation unit is used to calculate the event increment of surrounding rock fracture induced by blasting vibration in each monitoring area according to the number of surrounding rock fracture events before blasting and the number of surrounding rock fracture events after blasting.

[0120] The calculation module includes:

[0121] Setting up units for numerical simulation of the test surrounding rock to obtain the classification threshold;

[0122] A second classification unit is used to classify surrounding rock damage levels according to the classification threshold, wherein the surrounding rock damage levels include slight damage, low damage, medium damage and high damage;

[0123] a determination unit for determining the surrounding rock damage level of each monitoring area of ​​the test surrounding rock according to the event increment of surrounding rock fracture induced by blasting vibration in each monitoring area;

[0124] The second calculation unit is used to select two monitoring areas with adjacent surrounding rock damage levels respectively, and calculate the blasting vibration threshold of each surrounding rock damage level according to the classification threshold, the blasting vibration speed and event increment of the two adjacent monitoring areas.

[0125] It should be noted that, regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated on here.

[0126] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0127] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A method for controlling time-delay rockburst induced by blasting vibration based on microseismic events, characterized in that: include: Performing a blasting test on a test surrounding rock to obtain first information and second information of the test surrounding rock, wherein the first information includes microseismic event data before blasting and microseismic event data after blasting of the test surrounding rock, and the second information includes blasting vibration velocity; Acquire third information according to the first information, wherein the third information includes an event increment and an event position of surrounding rock fracture induced by blasting vibration; Classify surrounding rock damage levels according to the third information, and calculate blasting vibration thresholds of each surrounding rock damage level according to the second information; Optimizing blasting control parameters according to the surrounding rock damage level; Blasting the actual surrounding rock using the optimized blasting control parameters, and judging the time-lag rockburst risk of the actual surrounding rock after the blasting according to the blasting vibration threshold; The acquiring third information according to the first information includes: The first information is screened to obtain a surrounding rock rupture event waveform before blasting and a surrounding rock rupture event waveform after blasting; Performing event positioning on the surrounding rock rupture event waveform before blasting and the surrounding rock rupture event waveform after blasting to obtain the surrounding rock rupture event position before blasting and the surrounding rock rupture event position after blasting, wherein the event positioning adopts a PSO-layered positioning algorithm; According to the surrounding rock rupture event position before blasting and the surrounding rock rupture event position after blasting, the event position of surrounding rock rupture induced by blasting vibration is obtained; Performing regional screening on the event locations of surrounding rock fracture induced by the blasting vibration to obtain the number of pre-blasting fracture events and the number of post-blasting fracture events in multiple monitoring areas; Calculate the event increment of surrounding rock fracture induced by blasting vibration in each monitoring area according to the number of surrounding rock fracture events before blasting and the number of surrounding rock fracture events after blasting; The dividing of surrounding rock damage levels according to the third information and calculating the blasting vibration threshold of each surrounding rock damage level according to the second information includes: The test surrounding rock was numerically simulated to obtain the classification threshold; The surrounding rock damage level is divided according to the classification threshold, and the surrounding rock damage level includes slight damage, low damage, medium damage and high damage; According to the increment of the events of surrounding rock fracture induced by blasting vibration in each monitoring area, the surrounding rock damage level of each monitoring area of ​​the test surrounding rock is determined; Two monitoring areas with adjacent surrounding rock damage levels are selected respectively, and the blasting vibration threshold of each surrounding rock damage level is calculated according to the classification threshold, the blasting vibration velocity and the event increment of the two adjacent monitoring areas.

2. The method for controlling time-delay rockburst induced by blasting vibration based on microseismic events according to claim 1 is characterized in that , performing a blasting test on the test surrounding rock, the obtaining of the first information and the second information of the test surrounding rock comprises: Arrange multiple microseismic sensors and blasting vibration sensors around the test surrounding rock; Dividing the test surrounding rock into a plurality of monitoring areas; A blasting test is performed on the test surrounding rock, and microseismic events of the test surrounding rock are obtained through a microseismic sensor, and blasting vibration velocity is obtained through a blasting vibration sensor, wherein the microseismic events include blasting events, surrounding rock fracture events, and noise interference events; Data analysis is performed on the microseismic events to obtain microseismic event data before blasting and microseismic event data after blasting of the test surrounding rock.

3. The method for controlling time-delay rockburst induced by blasting vibration based on microseismic events according to claim 1 is characterized in that , the optimization of blasting control parameters according to the surrounding rock damage level includes: Determine the surrounding rock damage level of each monitoring area of ​​the test surrounding rock. If the monitoring area is slightly damaged, the blasting control parameters remain unchanged; If the monitoring area is low-damage, the detonation mode in the blasting control parameters of the monitoring area is optimized; If the monitoring area is moderately damaged, the controlled charge amount in the blasting control parameters of the monitoring area is optimized; If the monitored area is highly damaged, the blasting construction method in the blasting control parameters of the monitored area is optimized.

4. The method for controlling time-delay rockburst induced by blasting vibration based on microseismic events according to claim 1 is characterized in that , the actual surrounding rock is blasted by the optimized blasting control parameters, and the time-lag rockburst risk of the actual surrounding rock after blasting is judged according to the blasting vibration threshold, including: Blasting the actual surrounding rock through optimized blasting control parameters; Obtaining the blasting vibration velocity value of the actual surrounding rock after blasting; Compare the blasting vibration threshold with the blasting vibration velocity value of the actual surrounding rock to obtain the surrounding rock damage grade of the actual surrounding rock; The time-lag rockburst risk of the actual surrounding rock after blasting is judged by the surrounding rock damage level of the actual surrounding rock, and the time-lag rockburst risk includes no rockburst, slight rockburst, moderate rockburst and severe rockburst.

5. A blasting vibration-induced time-delay rockburst control device based on microseismic events, characterized in that: include: A first acquisition module is used to perform a blasting test on a test surrounding rock to acquire first information and second information of the test surrounding rock, wherein the first information includes microseismic event data before blasting and microseismic event data after blasting of the test surrounding rock, and the second information includes blasting vibration velocity; A second acquisition module is used to acquire third information according to the first information, wherein the third information includes an event increment and an event position of surrounding rock fracture induced by blasting vibration; a calculation module, configured to classify surrounding rock damage levels according to the third information, and calculate a blasting vibration threshold of each surrounding rock damage level according to the second information; An optimization module, used for optimizing blasting control parameters according to the surrounding rock damage level; A judgment module, used to blast the actual surrounding rock through the optimized blasting control parameters, and judge the time-lag rockburst risk of the actual surrounding rock after blasting according to the blasting vibration threshold; The second acquisition module includes: A first screening unit is used to screen the first information to obtain a surrounding rock rupture event waveform before blasting and a surrounding rock rupture event waveform after blasting; A positioning unit, used for performing event positioning on the waveform of the surrounding rock rupture event before blasting and the waveform of the surrounding rock rupture event after blasting, to obtain the position of the surrounding rock rupture event before blasting and the position of the surrounding rock rupture event after blasting, wherein the event positioning adopts a PSO-layered positioning algorithm; A second acquisition unit is used to acquire the event position of surrounding rock fracture induced by blasting vibration according to the event position of surrounding rock fracture before blasting and the event position of surrounding rock fracture after blasting; The second screening unit is used to perform regional screening on the event locations of surrounding rock fracture induced by the blasting vibration, and obtain the number of pre-blasting fracture events and the number of post-blasting fracture events in multiple monitoring areas; A first calculation unit is used to calculate the event increment of surrounding rock fracture induced by blasting vibration in each monitoring area according to the number of surrounding rock fracture events before blasting and the number of surrounding rock fracture events after blasting; The calculation module comprises: Setting up a unit for numerically simulating the test surrounding rock and obtaining a classification threshold; A second classification unit is used to classify surrounding rock damage levels according to the classification threshold, and the surrounding rock damage levels include slight damage, low damage, medium damage and high damage; A determination unit, used to determine the surrounding rock damage level of each monitoring area of ​​the test surrounding rock according to the event increment of surrounding rock fracture induced by blasting vibration in each monitoring area; The second calculation unit is used to select two monitoring areas of adjacent surrounding rock damage levels respectively, and calculate the blasting vibration threshold of each surrounding rock damage level according to the classification threshold, the blasting vibration speed and the event increment of the two adjacent monitoring areas.

6. The blasting vibration-induced time-delay rockburst control device based on microseismic events according to claim 5, characterized in that: The first acquisition module includes: An arrangement unit, used for arranging a plurality of microseismic sensors and blasting vibration sensors around the test surrounding rock; A first division unit is used to divide the test surrounding rock into a plurality of monitoring areas; A first acquisition unit is used to perform a blasting test on the test surrounding rock, acquire microseismic events of the test surrounding rock through a microseismic sensor, and acquire blasting vibration velocity through a blasting vibration sensor, wherein the microseismic events include blasting events, surrounding rock rupture events, and noise interference events; The analysis unit is used to perform data analysis on the microseismic events to obtain microseismic event data before blasting and microseismic event data after blasting of the test surrounding rock.

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