Zero-vibration-sense and micro-vibration-velocity fine blasting construction method for urban complex environment

Abstract

The invention relates to the field of building construction, in particular to a zero-vibration-sense and micro-vibration-velocity fine blasting construction method for an urban complex environment, which realizes high efficiency, safety and environmental protection of blasting construction through the technical means of geological investigation and environment evaluation, accurate design of blasting parameters, digital intelligent construction management, interval charging of water bags, automatic vibration velocity monitoring, wrong item damping and the like. By means of precise control over blasting energy and precise management over the construction process, blasting vibration, noise and dust are effectively controlled, and the influence on the surrounding environment is reduced. The method has the advantages that construction efficiency and quality are improved, economic benefits and social benefits are remarkably improved, and a new way is provided for safe and green development of urban underground space.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a zero-vibration, micro-vibration speed fine blasting construction method in a complex urban environment. Background Art

[0002] With the acceleration of urbanization, the development and utilization of urban underground space has become increasingly extensive, especially in the construction of infrastructure such as subways and tunnels, where blasting construction has become an indispensable part. However, the complex urban environment has put forward extremely high requirements for blasting construction, which not only ensures construction efficiency and quality, but also strictly controls the impact of blasting vibration on surrounding buildings (structures), residential areas and transportation routes.

[0003] Traditional blasting construction methods often have problems such as large vibration, high noise, and high dust, which have a serious impact on the surrounding environment and even cause complaints from residents and social conflicts. Especially in sensitive areas such as cultural relics protection areas and old residential areas, traditional blasting construction methods are even more difficult to apply.

[0004] In order to solve the above problems, domestic and foreign scholars and engineering technicians have conducted a lot of research and practice, and proposed a variety of fine blasting construction technologies. These technologies use quantitative blasting design, high-precision blasting equipment selection, refined blasting construction technology and construction management methods to precisely control the release of explosive energy and the process of medium crushing and throwing, so as to achieve the predetermined blasting effect and effectively control the harmful effects of blasting.

[0005] However, the application of existing fine blasting construction technology in complex urban environments still faces many challenges, such as how to accurately predict and control the impact of blasting vibration on surrounding buildings (structures), how to optimize blasting parameters to improve explosive energy utilization and reduce blasting costs, and how to ensure the safety and reliability of blasting construction.

[0006] Therefore, developing a zero-vibration, low-vibration precision blasting construction method suitable for complex urban environments is of great significance for promoting the safe, efficient and green development of urban underground space. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a zero-vibration, micro-vibration speed fine blasting construction method in a complex urban environment. Through innovative blasting construction technology and management methods, zero-vibration, micro-vibration speed blasting construction in a complex urban environment is achieved, providing reference and reference for similar projects.

[0008] To achieve the above object, the present invention provides the following technical solution: a zero-vibration, micro-vibration speed fine blasting construction method in a complex urban environment, comprising the following steps:

[0009] S1, Geological Survey and Environmental Assessment: Conduct detailed geological surveys on the construction site to determine geological conditions such as geological structure, rock layer distribution, rock properties, and assess the sensitivity of the surrounding environment, including adjacent buildings, residential areas, and transportation routes, in order to prepare an environmental assessment report and develop targeted safety measures and emergency plans;

[0010] S2, blasting parameter design: design blasting parameters according to geological survey results and surrounding environmental conditions, including explosive type, charge quantity, charge structure, blasthole arrangement, detonation sequence and delay, to ensure that the blasting energy release and medium crushing process are accurately controlled;

[0011] S3, construction hole layout and drilling: according to the blasting design parameters, construction holes are arranged on the tunnel section, and drilling operations are carried out using a drilling rig to ensure that the blasthole position, depth and angle meet the design requirements;

[0012] S4, charging and connecting detonation network: charging according to the designed charge amount, using water bag interval charging structure to improve the energy utilization rate of explosives, and connecting digital electronic detonator detonation system to achieve symmetrical detonation hole by hole;

[0013] S5, Detonation and safety alert: Deploy the detonation device at the designated detonation station and conduct safety alert before detonation to ensure that personnel and equipment within the detonation range are evacuated to a safe area;

[0014] S6, blasting effect monitoring and adjustment: After detonation, the blasting effect is monitored in real time through the automated stress monitoring system and the vibration velocity monitoring platform. The blasting parameters are adjusted according to the monitoring results to achieve a blasting effect with zero vibration and micro vibration velocity.

[0015] Optionally, the geological survey step also includes:

[0016] S11, using LTD-2600 ground penetrating radar for advanced geological prediction, detecting the strata in front of the tunnel face and providing accurate geological basis for blasting design;

[0017] S12, evaluate geological stability, analyze the impact of geological structure on tunnel excavation and blasting operations, and formulate targeted safety measures and emergency plans.

[0018] Optionally, the blasting parameter design step also includes:

[0019] S21, through single-hole tests, determine the blasting delay parameters under different geological conditions, and accurately calculate the amount of explosives, charge structure and detonation sequence;

[0020] S22, using Sadovsky formula to carry out regression analysis of blasting vibration attenuation coefficient K and α, shortening its value range and improving the accuracy of blasting parameter design.

[0021] Optionally, the construction hole arrangement and drilling steps also include:

[0022] S31, surveyors use red paint to accurately draw the center line and contour line of the excavation section, and mark the location of the blastholes according to the blasting design, with an error of no more than 5cm;

[0023] S32 uses an excavator drill in conjunction with a handheld pneumatic drill to perform drilling operations to ensure that the blasthole accuracy meets the design requirements.

[0024] Optionally, the steps of charging and connecting the detonation network also include:

[0025] S41, the peripheral holes use ordinary powder rolls to evenly disperse the charge, and the hole mouth is blocked by 30cm to 50cm; the remaining blast holes use water bags to space the charge structure to improve the energy utilization of the explosives;

[0026] S42, the blasting network adopts a digital electronic detonator blasting system, and the delay time difference between holes is about 8-25ms. The delay time difference of each section is adjusted according to the test results.

[0027] Optionally, the detonation and safety alert steps also include:

[0028] S51, the detonation station is located in a safe place, and personnel within 200 meters are ensured to evacuate when detonating;

[0029] S52, after detonation, conduct safety and quality inspections, analyze blasting effects, summarize experience, and optimize blasting parameters.

[0030] Optionally, the blasting effect monitoring and adjustment step also includes:

[0031] S61, real-time monitoring of blasting vibration, noise and steel bar stress parameters through automated stress monitoring system and vibration velocity monitoring platform;

[0032] S62, adjust blasting parameters such as hole spacing, charge amount, and delay according to the monitoring results to achieve a blasting effect with zero vibration and micro vibration speed.

[0033] Optionally, during pre-construction preparation, construction organization design and personnel training are also required, and shock reduction measures should be designed.

[0034] Optionally, ventilation and hazard elimination operations are required after detonation, and slag discharge can be carried out after confirmation.

[0035] The beneficial effects of the present invention are:

[0036] 1) Through refined blasting design and construction control, the present invention can significantly reduce the pollution of blasting vibration, noise and dust to the surrounding environment, effectively protect the safety of buildings and residents in sensitive areas such as cultural relics protection areas and old residential areas, reduce social conflicts and complaints, and enhance the image of the city;

[0037] 2) The present invention adopts advanced blasting equipment and refined construction management methods. The present invention can accurately control the explosive energy release and medium crushing process, achieve the predetermined blasting effect, reduce over-excavation and under-excavation, improve construction efficiency and quality, and reduce engineering costs;

[0038] 3) Through the application of technologies such as geological survey and environmental assessment, automated stress monitoring system and vibration velocity monitoring platform, the present invention can monitor the safety status of the blasting construction process in real time, discover and deal with potential safety hazards in a timely manner, and ensure the life safety of construction personnel and engineering safety;

[0039] 4) The proposal and implementation of this invention will promote the innovation and progress of blasting construction technology, promote the development of related equipment, instruments and monitoring technology, provide technical support and guarantee for the safe, efficient and green development of urban underground space, and promote the sustainable development of the entire industry;

[0040] 5) The present invention can bring significant economic benefits to the construction unit by reducing the damage caused by blasting vibration to surrounding buildings (structures), reducing compensation and repair costs, while improving construction efficiency and quality and reducing engineering costs. At the same time, the present invention can also bring good social benefits by protecting the environment and residents' safety and improving the city's image.

[0041] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0043] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0044] 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 illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0045] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0046] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances. Specific embodiments

[0048] See also Figure 1 , which is a zero-vibration, micro-vibration speed fine blasting construction method in a complex urban environment. This embodiment is applied to the Chongqing Rail Transit Line 18 North Extension Project, and includes the following steps:

[0049] S1, Geological Survey and Environmental Assessment

[0050] Geological survey: The project team used various methods to conduct detailed geological surveys on the construction site, including drilling, geophysical exploration, sampling and testing, etc., to determine geological conditions such as geological structure, rock layer distribution, and rock properties. Through the survey, it was found that the main strata in the construction area were interbedded sandstone and mudstone, with moderate rock strength but relatively developed joints.

[0051] Environmental assessment: Assess the sensitivity of the surrounding environment and identify key protected objects such as adjacent buildings, residential areas, and transportation routes. Based on the assessment results, a detailed environmental assessment report was prepared, and targeted safety measures and emergency plans were formulated to ensure environmental protection and resident safety during the construction process.

[0052] S2, blasting parameter design

[0053] Basic design: Design blasting parameters based on geological survey results and surrounding environmental conditions. Emulsion explosives are used as explosives, and the amount is calculated based on rock properties and excavation sections. Water bags are used for charging to improve the energy utilization of explosives. The blasthole arrangement follows the principle of "slot holes first, auxiliary holes follow up, and peripheral holes are controlled" to ensure that the blasting energy release and medium crushing process are precisely controlled.

[0054] Parameter optimization: Determine the blasting delay parameters under different geological conditions through single-hole tests, and calculate the amount of explosives, charge structure and detonation sequence in detail. At the same time, use the Sadovsky formula to perform regression analysis on the blasting vibration attenuation coefficient K value and α value, shorten its value range, and improve the accuracy of blasting parameter design.

[0055] S3, construction hole layout and drilling

[0056] Construction hole layout: Surveyors use red paint to accurately draw the center line and contour line of the excavation section, and mark the location of the blastholes according to the blasting design, with the error controlled within 5 cm. In principle, the hole layout is designed according to the tunnel section to ensure that the blasthole layout is reasonable and covers the whole area.

[0057] Drilling: The drilling operation is carried out by using an excavator drill and a handheld pneumatic drill. The drilling accuracy of the slot holes and peripheral holes is higher, and the hole opening error is controlled within 3cm and 5cm respectively. During the drilling process, the depth of the blasthole is adjusted according to the concave and convex degree of the rock at the hole mouth to ensure that the bottom of the blasthole is on the same plane.

[0058] In this embodiment, the auxiliary holes are generally arranged in a circle from the inside to the outside, the inner circle assists the grooving effect, and the outer circle enhances the light explosion effect. Currently, the auxiliary hole charge decreases from the inside to the outside, and the spacing decreases from the inside to the outside. The hole spacing is controlled between 0.85-1.2 meters.

[0059] In this embodiment, the arrangement of the outer ring auxiliary holes has a greater influence on the control of the light explosion effect. Through the summary of the preliminary test explosion of the method application, the spacing between the outer ring auxiliary holes and the surrounding hole rows should be controlled at 60-65cm.

[0060] In this embodiment, when the joints in the interbedded sandstone and mudstone formations are relatively developed, the peripheral hole spacing should be controlled at 40-45 cm, the charge amount should be controlled at 0.45-0.6 kg, and the distance from the excavation contour line should be controlled at 5-15 cm. As the rock joints develop more, the hole spacing is appropriately reduced, the charge amount is reduced, and the distance from the excavation contour line is increased.

[0061] S4, charging and connecting detonation network

[0062] Charging operation: Carry out charging according to the designed charge amount. Ordinary medicine rolls are used to evenly distribute the charge in the peripheral holes, and the hole openings are blocked by 30cm to 50cm; the remaining blast holes are charged with water bags to improve the energy utilization of explosives. All blast holes are blocked with gun mud, and the blocking length is not less than 20cm.

[0063] In this embodiment, the incompressibility of blasting shock waves to water is utilized to transfer the blasting energy to the surrounding rock of the blasthole through water without loss, thereby generating a "water vapor" effect, reducing the attenuation of blasting shock waves, and improving the effective energy utilization rate of explosives, thereby achieving the effects of energy saving, cost reduction, and efficiency improvement. The water mist generated after the explosion is conducive to dust reduction and adsorption of harmful and toxic gases, and the water bag at the bottom of the blasthole is more conducive to the crushing of the surrounding rock without leaving the blasthole root.

[0064] The construction process is to put a water bag into the bottom of the blasthole, followed by a charge roll, then a water bag, and finally backfill it with gun mud. The structure is water bag → explosives → water bag → gun mud sealing.

[0065] In the better rock sections, water bags + electronic digital detonators are used for intermittent charging. Through the "water model effect" of explosion stress waves, bubble pulsation pressure waves and high-pressure water flow, and the "gas model effect" of gas generated during the explosion acting on the water medium, secondary damage is caused to the rock mass, further extending its cracks and intensifying vibration throwing.

[0066] In the section with poor surrounding rock, the thickness of the reserved control layer is controlled, that is, the distance from the peripheral holes to the excavation outline is appropriately increased. The purpose is to make the distribution of explosives more reasonable, which is conducive to the full diffusion of explosive gas and the uniform release of energy, and reduce the local over-crushing or under-crushing site; the purpose is to ensure the effective application of explosive energy and reduce ineffective release, so as to achieve the effect of reducing vibration speed, improving efficiency and economic benefits, and reducing vibration impact and flying rocks.

[0067] Detonation network: The detonation network uses a digital electronic detonator detonation system to achieve symmetrical detonation of each hole. The delay time difference between holes is adjusted to about 8-25ms according to the test results to ensure the orderly release of blasting energy.

[0068] In this embodiment, different delay settings can be used to improve the overall blasting effect and control the vibration velocity through the theory of staggered vibration reduction. According to the application of this method, the current delay time is set to 8-25ms according to the characteristics of the surrounding rock, which can effectively reduce the vibration velocity. However, due to different engineering geological conditions, there are differences in rock properties and joint development, which need to be summarized according to actual conditions.

[0069] S5, Detonation and Safety Alert

[0070] Detonation station layout: The detonation station is located in a safe location 200m away from the construction passage that has turned the corner outside the station to ensure that people within 200m are evacuated when detonation occurs.

[0071] Safety alert: alert will be carried out 30 minutes before each blasting, and all personnel within the alert area must be evacuated. When detonating, alert will be carried out 100m before and after the road outside the site, at the construction gate, and at the cave entrance. At the same time, blasting notice will be issued, and warning signal, detonation signal and release alert signal will be issued in sequence.

[0072] S6, blasting effect monitoring and adjustment

[0073] Monitoring implementation: After detonation, the blasting vibration, noise and steel bar stress parameters are monitored in real time through the automated stress monitoring system and vibration velocity monitoring platform. The monitoring data is transmitted to the data center in real time for analysis and processing.

[0074] In this embodiment, the monitoring system is as follows:

[0075] Vibration monitors: Vibration monitors are placed at key locations around the blasting area to monitor the vibration waves generated during the blasting process in real time. The monitors can automatically record parameters such as vibration speed and frequency, and transmit the data to the data center for analysis and processing.

[0076] Noise monitor: Noise monitors are set up around the blasting area to monitor the noise level generated during the blasting process. The monitor can display the noise decibel value in real time and issue an alarm when it exceeds the standard.

[0077] Data Center: A data center is established to receive and process monitoring data such as vibration and noise. The data center is equipped with professional analysis software and an engineering team that can conduct in-depth analysis and evaluation of monitoring data, providing a scientific basis for the adjustment and optimization of blasting operations.

[0078] Parameter adjustment: According to the monitoring results, the blasting parameters such as the distance between the blastholes, the charge amount, the delay, etc. are adjusted to achieve the blasting effect of zero vibration and micro-vibration speed. Through multiple adjustments and optimizations, the blasting vibration speed is finally controlled within 0.3cm / s, achieving the cultural relic-level vibration speed control target.

[0079] III. Other key measures

[0080] Construction organization design and personnel training: Before construction, a detailed construction organization design was formulated to clarify the construction process, quality control standards and safety measures of each process. At the same time, strict safety education and skills training were carried out for all personnel involved in the construction to ensure the safety of personnel during the construction process.

[0081] Shock reduction measures: In view of the large number of sensitive buildings around the construction area, the project team has adopted a variety of shock reduction measures, such as setting up shock-absorbing trenches, dust-proof nets, protective nets, etc., to reduce the adverse effects of blasting operations on the surrounding environment.

[0082] In this embodiment, the staggered shock absorption blasting technology is also used. The core of the staggered phase shock absorption design is to use the principle of wave superposition. When two or more waves meet in space, they will be superimposed on each other, and the waveform after superposition depends on the phase difference of each wave. If the detonation time of adjacent blast holes is delayed by a certain amount through precise control, the seismic waves generated by them will be staggered in phase during the propagation process, thereby weakening the peak intensity of the superimposed wave and achieving the purpose of shock absorption.

[0083] First, it is necessary to find the main vibration frequency of the seismic wave through blasting tests, and conduct multiple tests at the actual blasting site to record and analyze the waveform and frequency characteristics of the seismic wave under different blasting parameters. According to the results of the blasting test and the actual situation of the project, the blastholes are arranged reasonably. Parameters such as the location, spacing and depth of the blastholes should be designed according to the specific project requirements. Electronic detonators are installed in each blasthole, and precise interval detonation time is set. This time difference needs to be calculated based on the propagation speed of the seismic wave and the spacing between blastholes to ensure that the seismic waves generated by adjacent blastholes can be staggered.

[0084] According to the vibration peak value of blasting monitoring, the corresponding blasting hole position is locked by the vibration generation time, and the corresponding hole position parameters are analyzed and adjusted to finally achieve the effect of reducing the vibration speed. Through the continuous optimization and adjustment of blasting parameters, the construction goal of cultural relic-level fine blasting vibration speed ≤ 0.3cm / s is finally achieved.

[0085] The method adopts this technology, on the one hand, to more effectively protect adjacent structures, improve construction efficiency and reduce project costs; on the other hand, it also aims to deeply summarize the realization conditions and application value of staggered vibration reduction blasting. After testing, the overall application effect is good and has promotion value.

[0086] Ventilation and hazard elimination: After detonation, ventilation operations shall be carried out immediately. After the air quality reaches the standard, the blaster, technician, and deputy project manager shall organize the site to find the top and eliminate the hazard and sign for confirmation. Only after confirmation can the slag removal operation be carried out.

[0087] In this embodiment, the blasting parameter setting also includes:

[0088] First, calculate the maximum amount of explosives allowed for simultaneous explosions at the nearest protective object, and then reversely calculate whether the calculated earthquake velocity of other protective objects under this amount of explosives meets the requirements; according to the distance of the nearest building to the explosion point, according to the formula Q = R 3 ×(V / K) 3 / αCalculation is performed, α is taken as 2.0, K is taken as 250, and the maximum blasting charge is calculated according to the maximum vibration speed of 0.5 cm / s for general buildings and 0.3 cm / s for protected cultural relics according to the vibration speed control requirements; my country's "Safety Regulations for Blasting" adopts the peak vibration speed of the geological point where the protected object is located as the main physical quantity indicator for blasting vibration judgment. According to the formula V=K×(Q1 / 3 / R)α, the maximum blasting charge designed in this scheme is used to verify whether the blasting vibration speed at the protected object meets the designed maximum allowable safe vibration speed. The K and α values ​​are selected according to the actual terrain and geological conditions between the blasting point and the protected object. This method selects α=2.0 and K=250.

[0089] IV. Implementation Effect

[0090] Through the application of this embodiment, the blasting construction of Chongqing Rail Transit Line 18 North Extension Project has achieved remarkable results. The blasting vibration speed has been effectively controlled, reaching the cultural relic-level vibration speed control target; noise and dust pollution have been significantly reduced, achieving the goal of zero complaints from residents; construction efficiency and quality have been greatly improved, the construction period has been greatly shortened, and the economic benefits are significant. At the same time, the successful application of this construction method also provides valuable experience and reference for blasting construction in similar complex environments.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. Zero vibration, micro-vibration speed fine blasting construction method in complex urban environment, characterized by: The following steps are involved: S1, Geological Survey and Environmental Assessment: Conduct detailed geological surveys on the construction site to determine geological conditions such as geological structure, rock layer distribution, rock properties, and assess the sensitivity of the surrounding environment, including adjacent buildings, residential areas, and transportation routes, in order to prepare an environmental assessment report and develop targeted safety measures and emergency plans; S2, blasting parameter design: design blasting parameters according to geological survey results and surrounding environmental conditions, including explosive type, charge quantity, charge structure, blasthole arrangement, detonation sequence and delay, to ensure that the blasting energy release and medium crushing process are accurately controlled; S3, construction hole layout and drilling: according to the blasting design parameters, construction holes are arranged on the tunnel section, and drilling operations are carried out using a drilling rig to ensure that the blasthole position, depth and angle meet the design requirements; S4, charging and connecting detonation network: charging according to the designed charge amount, using water bag interval charging structure to improve the energy utilization rate of explosives, and connecting digital electronic detonator detonation system to achieve symmetrical detonation hole by hole; S5, Detonation and safety alert: Deploy the detonation device at the designated detonation station and conduct safety alert before detonation to ensure that personnel and equipment within the detonation range are evacuated to a safe area; S6, blasting effect monitoring and adjustment: After detonation, the blasting effect is monitored in real time through the automated stress monitoring system and the vibration velocity monitoring platform. The blasting parameters are adjusted according to the monitoring results to achieve a blasting effect with zero vibration and micro vibration velocity.

2. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: The geological survey steps also include: S11, using LTD-2600 ground penetrating radar for advanced geological prediction, detecting the strata in front of the tunnel face and providing accurate geological basis for blasting design; S12, evaluate geological stability, analyze the impact of geological structure on tunnel excavation and blasting operations, and formulate targeted safety measures and emergency plans.

3. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: The blasting parameter design steps also include: S21, through single-hole tests, determine the blasting delay parameters under different geological conditions, and accurately calculate the amount of explosives, charge structure and detonation sequence; S22, using Sadovsky formula to carry out regression analysis of blasting vibration attenuation coefficient K and α, shortening its value range and improving the accuracy of blasting parameter design.

4. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: The construction hole arrangement and drilling steps also include: S31, surveyors use red paint to accurately draw the center line and contour line of the excavation section, and mark the location of the blastholes according to the blasting design, with an error of no more than 5cm; S32 uses an excavator drill in conjunction with a handheld pneumatic drill to perform drilling operations to ensure that the blasthole accuracy meets the design requirements.

5. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: The steps of charging and connecting the detonation network also include: S41, the peripheral holes use ordinary powder rolls to evenly disperse the charge, and the hole mouth is blocked by 30cm to 50cm; the remaining blast holes use water bags to space the charge structure to improve the energy utilization of the explosives; S42, the blasting network adopts a digital electronic detonator blasting system, and the delay time difference between holes is about 8-25ms. The delay time difference of each section is adjusted according to the test results.

6. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: The detonation and safety alert steps also include: S51, the detonation station is located in a safe place, and personnel within 200 meters are ensured to evacuate when detonating; S52, after detonation, conduct safety and quality inspections, analyze blasting effects, summarize experience, and optimize blasting parameters.

7. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: The blasting effect monitoring and adjustment steps also include: S61, real-time monitoring of blasting vibration, noise and steel bar stress parameters through automated stress monitoring system and vibration velocity monitoring platform; S62, adjust blasting parameters such as hole spacing, charge amount, and delay according to the monitoring results to achieve a blasting effect with zero vibration and micro vibration speed.

8. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 1 is characterized in that: During pre-construction preparation, construction organization design and personnel training are also required, and shock-absorbing measures should be designed.

9. The zero-vibration, micro-vibration speed fine blasting construction method for complex urban environments according to claim 6 is characterized in that: After detonation, ventilation and hazard elimination operations are required. After confirmation, slag discharge can be carried out.

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