Partitioned gravity center dynamic scheduling boiler room group directional collapse blasting method and system

Abstract

The application discloses a kind of partition gravity dynamic scheduling boiler room group blasting method and system, belong to the technical field of blasting demolition.The method is divided into a partition by seat boiler room, and is accurately constructed the physical model of each partition by combining high-precision numerical simulation and field geological exploration;According to the group effect dynamic coupling theory, the initial delay sequence of initiation is designed to control the vibration main frequency to avoid resonance;During the blasting process, the blasting vibration is monitored in real time by intelligent vibration sensor network, and compared with the safety threshold, when the vibration is overproof, online start adaptive correction mechanism, all subsequent unblasting partition initiation delay is adjusted dynamically step by step, dynamically fine tuning.The application solves the technical problems such as vibration superposition, geological uncertainty and resonance risk when large building group is demolished in dense environment, realizes the leap from open-loop prediction to closed-loop adaptive control, significantly improves the precision, safety and intelligent level of blasting demolition process.

Description

Technical Field

[0001] This invention relates to the field of demolition technology, specifically a method and system for directional collapse demolition of boiler room groups based on dynamic scheduling of zoned center of gravity, which is particularly suitable for safe and controllable directional demolition of multiple large boiler room groups in dense environments. Background Technology

[0002] Driven by the national "dual-carbon" strategy, the green transformation of traditional high-energy-consuming and high-emission industrial facilities has become a key aspect of urban renewal and industrial upgrading. Among these, large coal-fired boiler rooms, which have been in service for many years, are facing increasing demands for demolition and site reuse due to their generally low thermal efficiency and their prevalence in densely populated areas. These boiler room complexes typically exhibit high structural complexity. Their main structure is often a reinforced concrete frame, supporting and suspending the massive boiler body, auxiliary equipment, and dense piping systems. Vertically, they often integrate towering chimneys ranging from 40 to 180 meters in height; horizontally, they contain large-span coal bunkers with spans of 15 to 30 meters. This hybrid load-bearing system, combining vertical height and horizontal extension, results in extremely uneven distribution of overall structural stiffness, especially at critical locations such as beam-column joints, where the shear strength of the reinforced concrete joints fluctuates significantly. Furthermore, the buildings may contain residual waste heat boilers, dust collectors, and other equipment containing uncleaned hazardous chemicals. These complex structural features and potential safety hazards make traditional mechanical demolition methods not only inefficient but also extremely risky, making it difficult to meet the comprehensive requirements of modern urban renewal for safety, efficiency, and environmental protection.

[0003] Therefore, using blasting technology for overall demolition has become a more advantageous technical approach, as it can significantly reduce dust and noise pollution and achieve up to 98% targeted recycling of construction waste. However, applying existing blasting technology to the demolition of this type of boiler room complex in a dense environment faces a series of severe technical challenges.

[0004] First, there is the challenge of group effects and vibration control. When multiple boiler rooms, each weighing tens of thousands of tons, collapse simultaneously or within a very short time interval, the resulting ground shock waves will superimpose, potentially causing peak vibration intensities far exceeding the safety thresholds of nearby critical facilities (such as precision equipment workshops and rail transit lines). Simultaneously, the complex spatial network formed by the large-span steel frames and piping systems connecting the boiler room clusters makes the transmission path of stress waves generated by the blast unpredictable, easily triggering asymmetric collapses or chain reactions, thus placing extremely high demands on the stability control of the demolition process.

[0005] Secondly, there is the challenge of precisely designing blasting parameters. The propagation and attenuation characteristics of blasting vibrations in underground media are closely related to geological conditions. For example, the vibration attenuation coefficients of soft soil foundations and rock foundations can differ by 3 to 5 times. Traditional blasting designs often use uniform, experience-based parameters, which are difficult to accurately adapt to the complex and ever-changing geological conditions on site, resulting in insufficient precision in vibration control. More importantly, the vibration waves generated by blasting have specific spectral characteristics. If their dominant frequency is close to the natural frequency of important surrounding buildings and structures, even if the absolute velocity of the vibration is within a safe range, it may still trigger a resonance effect, posing a potential threat to the structural safety of the protected target. Existing technologies generally lack proactive, preemptive avoidance measures for this.

[0006] Finally, existing blasting technologies generally employ a static, open-loop control mode. This means that once the design is complete, it is executed on-site in a single operation, lacking the ability to handle uncertainties during the blasting process. For example, local geological variations not fully explored in the initial survey may cause discrepancies between the actual vibration response and theoretical predictions. In this open-loop mode, it is impossible to dynamically adjust the blasting parameters of subsequent batches based on real-time monitoring data from the initial blast. The safety of the entire demolition process is highly dependent on the initial accuracy of the design, lacking adaptive correction capabilities during the process, thus posing a high safety risk.

[0007] Therefore, there is an urgent need for a more advanced and intelligent blasting demolition technology that can systematically solve the above problems. Summary of the Invention

[0008] The present invention aims to solve the problems of low vibration control accuracy and high safety risks in the prior art when demolishing densely distributed boiler room groups by explosives, which are due to the lack of a systematic linkage scheduling scheme, the inability to quantify the change in center of gravity caused by pre-processing, and the inability to perform closed-loop feedback correction based on real-time vibration monitoring.

[0009] To address the aforementioned problems, this invention provides a method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity, characterized in that the method is used for... For boiler room units that require directional collapse, the following steps are included: S1. Partitioning, The boiler rooms were divided into sections according to the planned demolition sequence. Each adjacent partition is numbered sequentially; S2. Parameter Acquisition: Collect the centroid height for each partition. ,span and the horizontal distance to the nearest protected target This includes conducting geological surveys of the site to determine vibration attenuation characteristics, and determining the height of the center of gravity using high-precision numerical simulations. ; S3. Timing Calculation: Based on the preset collapse mechanics model and the parameters collected in step S2, determine the initial detonation delay for each zone and its internal detonation zone. In order to regulate the main frequency of the blasting vibration, the natural frequency of the protected target is avoided; S4. Linkage triggering: Send delayed signals to the electronic detonators in each zone sequentially according to the zone number. The detonation command, wherein the delay is automatically compensated based on the height difference and horizontal distance between the centers of gravity of adjacent zones; S5. Step-by-step closed-loop correction, at the... After each zone is detonated, the vibration velocity generated is collected in real time. and will With safety threshold In contrast, when When safety requirements are not met, the correction amount is calculated online according to a predefined function. And the detonation delay for the next adjacent and all subsequent undetonated zones. Perform online corrections.

[0010] Preferably, in step S1, the The division of each zone should avoid the superposition of ground vibration waves generated by blasting in each zone, and provide a time window for the closed-loop correction in step S5.

[0011] Preferably, in step S2, the high-precision numerical simulation employs a discrete-element-finite-element coupled algorithm to accurately quantify the impact of preprocessing on the centroid height. The impact.

[0012] Preferably, in step S3, the initial detonation delay Calculate using the following formula: ; in, For the first Initial detonation delay of the partition; Base delay; This is the proportionality coefficient; For the first The direction and span of the collapsed section; For the first Zone center height; It is the exponential coefficient.

[0013] Preferably, the base delay The value is set between 20 and 200 ms; the proportionality coefficient is... The value is taken as 10–50 ms; the exponential coefficient is... Take a value of 1.2 to 2.0.

[0014] Preferably, in step S5, the online fine-tuning amount is... Calculate using the following formula: ; in, For subsequent partitioning The correction increment; This is a correction factor; For actual vibration velocity; This is a preset safety threshold.

[0015] On the other hand, the present invention also provides a directional collapse blasting system for boiler room groups with dynamic scheduling of zoned center of gravity, comprising: The partition control module is used to execute step S1; The parameter measurement and modeling module is used to execute step S2; The timing calculation and optimization module is used to execute step S3 and receive correction instructions from the closed-loop feedback and adaptive control module. The detonation trigger module is used to execute step S4; The closed-loop feedback and adaptive control module is used to execute step S5 and calculate the correction amount. The data is then sent to the timing calculation and optimization module.

[0016] Preferably, the parameter measurement and modeling module includes a total station, a 3D laser scanner, a millimeter-level distance measuring instrument, an intelligent vibration sensor network, and numerical simulation software with an embedded discrete element-finite element coupling algorithm.

[0017] Preferably, the timing calculation and optimization module has an embedded algorithm for frequency domain control of blasting vibration.

[0018] Preferably, the detonation triggering module uses a programmable logic controller and an electronic detonator controller in coordination, and all electronic detonators are connected in parallel through a low-resistance blasting bus to realize command issuance.

[0019] Compared with existing technologies, this invention not only proactively avoids resonance risks to surrounding sensitive buildings during the blasting scheme design stage by introducing the concept of frequency domain modulation, but more importantly, it establishes for the first time a step-by-step closed-loop adaptive correction mechanism based on real-time monitoring during the blasting process. This intelligent control capability enables the blasting scheme to dynamically respond to uncertainties on-site, such as geological differences, elevating vibration control from traditional "passive prediction" to a new level of "active intelligent management," thereby fundamentally ensuring the absolute safety of critical facilities such as turbine halls located as close as 7.9 meters away. Based on this high level of safety assurance, this invention employs DEM-FEM high-precision numerical simulation technology to accurately quantify the impact of complex factors such as preprocessing and nodal strength differences on structural collapse behavior, achieving a precise shift in blasting design from "experience-based" to "model-based." Simultaneously, the constructed group effect dynamic coupling theoretical framework provides a solid scientific basis for the coordinated and orderly demolition of multiple large buildings, significantly improving engineering benefits.

[0020] This invention not only shortens the demolition cycle by more than 60% compared to traditional methods while ensuring the highest safety level, through systematic planning and refined control, but also effectively avoids potential repair and compensation costs caused by blasting damage due to its high-precision vibration control capabilities. Furthermore, its precise directional collapse process achieves up to 98% directional recycling of construction waste, contributing significant economic, social, and environmental benefits to urban renewal. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the overall layout and preset collapse direction of the boiler room group to be demolished in an embodiment of the present invention; Figure 2 This is a schematic diagram of the dense environment in which the group of boiler rooms to be demolished is located and the key distances between them and the surrounding protected targets in an embodiment of the present invention; Figure 3 This is a schematic diagram of an embodiment of the present invention, which describes the division of the detonation zone according to the axis of the columns inside a single boiler room and the design of a millisecond delay aimed at achieving frequency domain control. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

[0024] Example 1: This embodiment provides a method for directional collapse demolition of boiler room groups using dynamic scheduling of zoned center of gravity. It is particularly suitable for efficient and safe demolition of multiple large boiler room structures in complex environments, such as dense urban areas or surrounding sensitive targets like residential areas, important industrial facilities, and major transportation routes. Before describing the specific technical solution of this invention, it is important to clarify that the core of this embodiment lies in constructing a systematic solution integrating accurate model prediction, active frequency control, and real-time closed-loop adaptive correction. This aims to fundamentally solve the key technical challenges faced in the demolition of large building groups in dense environments, such as vibration superposition, resonance risks, and on-site uncertainties.

[0025] To more clearly illustrate the present invention, this embodiment will take the demolition project of four 215MW coal-fired power plant boiler rooms of a power generation company in Zhejiang Province as an example, and will be described in detail with reference to the accompanying drawings. This project involves four U-shaped fluidized bed boiler rooms with basically the same model, structure, and dimensions, i.e., those described in this embodiment. This refers to a boiler room unit that requires directional collapse; here, N equals 4. Refer to the attached instruction manual. Figure 1 These four boiler rooms, from east to west, are boiler room #3, boiler room #4, boiler room #5, and boiler room #6. They are arranged in a line along the east-west direction and together form a group of boiler rooms that need to be planned as a whole and demolished in stages.

[0026] Before commencing blasting operations, a thorough survey and analysis of the complex environment at the construction site is necessary. (Refer to the attached instruction manual.) Figure 2 The boiler room complex, as a whole, is situated in an extremely sensitive and complex environment. On its northern boundary, the entire complex is adjacent to the turbine hall, which is the core protected target, with a minimum planar distance between the two. The collapse site is only 7.9 meters high, and there is a complex two-story platform structure and numerous power and control pipelines connecting the two sections. To its south, there are towering chimneys about 62 meters away from the boiler room complex and desulfurization towers further away, forming a relatively open collapse area. To its east and west, and in a wider surrounding area, are several sensitive targets requiring key protection. For example, about 132 meters west of the boiler room complex is a three-story office building; about 191 meters northwest is a residential area; and about 176 meters southwest is a dry coal shed. These structures scattered around the boiler room complex together constitute a group of protected targets whose impact range needs to be strictly controlled during blasting operations. Structurally, each boiler room is a typical reinforced concrete frame structure, with individual dimensions of 36 meters long, 30 meters wide, and 62.7 meters high, a height-to-width ratio of approximately 1.2:1, and a single unit weight of approximately 10,000 tons. Its structure is not only tall and has a high center of gravity, but also exhibits significant differences and fluctuations in the shear strength of its internal reinforced concrete joints, especially the beam-column joints, with a range of up to ±20%. This complex external environment and inherent structural characteristics together place extremely high demands on the safety, precision, and controllability of the blasting demolition.

[0027] To systematically address the above challenges, the method described in this embodiment specifically includes the following steps: First, step S1, namely, zoning, is executed. This step is the foundation for implementing group effect collaborative management and control and achieving subsequent dynamic regulation. According to the predetermined demolition sequence, the total number of [number missing] [units missing] is [number missing]. The boiler room of the building is divided into The adjacent zones are numbered sequentially. In this embodiment, in order to fundamentally avoid the catastrophic superposition effect of ground vibration waves that may be caused by the simultaneous or very short interval collapse of multiple boiler rooms, and to provide sufficient time window for subsequent step-by-step closed-loop correction, the overall construction strategy of staged blasting was determined.

[0028] Therefore, A boiler room with four boilers is divided into This equates to four zones, each corresponding to a boiler room. The specific blasting sequence is not simply from east to west or west to east, but rather determined based on a comprehensive assessment of on-site construction convenience and the impact on the surrounding environment. The sequence is: demolish boiler rooms #4, #5, #6, and finally #3. The core purpose of this macro-level zoning is to ensure that the ground vibration waves generated by the blasting in the previous zone have been sufficiently attenuated by setting a sufficiently long time interval between blasting operations in each zone, such as optionally more than 24 hours, thus creating a safe "vibration time window" for the blasting in the next zone. This division not only eliminates the risk of vibration energy accumulation over time but also provides the necessary time margin for data acquisition, analysis, decision-making, and command issuance for the closed-loop correction in step S5, which is a prerequisite for achieving adaptive control of the entire blasting process.

[0029] Based on the macroscopic zoning, in order to achieve precise collapse control and fine-tuning of vibration energy within a single boiler room, each zone will be further divided into smaller units. (Refer to the attached instruction manual.) Figure 3 The diagram clearly illustrates the division of detonation zones within a single boiler room based on the axes of its main load-bearing columns. Specifically, along the east-west direction of the boiler room, perpendicular to the collapse direction, there are four main column axes. In this embodiment, the single boiler room is divided into four detonation zones—K4, K3, K2, and K1—along the north-south direction, from the front facing the collapse direction to the rear facing away from the collapse direction. The K4 axis area, located at the southernmost side of the boiler room and being the frontmost zone during collapse, is designated as the first detonation zone. The K1 axis area, located at the northernmost side of the boiler room and adjacent to the turbine hall requiring protection, is designated as the last detonation zone, and its detonation method and delay design will play a decisive role in controlling the recoil effect. This two-tiered division system, from macroscopic boiler room zoning to microscopic internal detonation zone division, constitutes the structural foundation for the refined and intelligent control achieved in this embodiment.

[0030] Next, step S2, parameter acquisition and model building, is performed. This is a crucial step that provides accurate input and scientific basis for all subsequent calculations and decisions. First, comprehensive and accurate parameter acquisition is required for each designated zone, i.e., each boiler room to be demolished. This includes using high-precision measuring equipment such as total stations, 3D laser scanners, and millimeter-level rangefinders to obtain key geometric parameters, such as the span in the collapse direction. In this example, the value is the north-south width of the boiler room, which is 30 meters, and the horizontal distance to the nearest protected target. In this example, the minimum distance between boiler room #4 and the turbine room on the north side is 7.9 meters. This value will serve as the primary basis for setting the vibration safety threshold.

[0031] Meanwhile, a crucial step is to conduct a detailed geological survey of the blasting site. Through drilling, sampling, geophysical exploration, and other methods, detailed geomechanical parameters of the site area are obtained, allowing for the precise determination of vibration attenuation characteristics and coefficients for different foundation types, such as soft soil or rock foundations. This geological survey data forms the basis for subsequent customized and precise design of detonation parameters, overcoming the problem of inaccurate vibration predictions caused by geological differences.

[0032] When collecting structural parameters, especially the height of the center of gravity. Regarding this core parameter, this embodiment employs an advanced demolition process. Before the actual blasting, a series of pretreatment and structural weakening operations are typically required for the boiler room. For example, a combination of mechanical crushing and manual removal is used to demolish non-load-bearing structures within the blasting cut area, such as elevator shaft transverse walls, coal conveyor bridges, and soot blowing chambers. The piping system connecting to the boiler room body above the 10-meter platform is also segmented and flexibly fixed. These operations inevitably alter the original mass distribution of the boiler room. In particular, the removal of the bottom-level components results in a significant rise in the overall actual center of gravity compared to the original design drawings. To accurately quantify this "center of gravity rise" effect, this embodiment employs high-precision numerical simulation technology.

[0033] Specifically, a fusion discrete element-finite element method (DEM-FEM) algorithm was used to construct a high-fidelity three-dimensional numerical model of the boiler room. This model can accurately calculate the true center of gravity height of the remaining main structure of the boiler room after the operation, based on the pre-processed actual range. In this example, the height of the center of gravity is calculated by the model. The length is approximately 38.3 meters, and it also fully considers the impact of factors such as the strength difference of steel-concrete joints and complex structural connection methods on the collapse dynamics, as mentioned above, providing a high-precision analysis tool for subsequent collapse path prediction and timing design.

[0034] Subsequently, step S3, namely time-series calculation and frequency domain modulation, is performed. This step, based on a pre-defined and validated collapse mechanics model and comprehensively incorporating all parameters collected in step S2, including geometric dimensions, the model-corrected center of gravity height, and field-measured geological attenuation characteristics, determines an initial detonation delay for each macroscopic zone and its internal microscopic detonation zones (K1 to K4). The core technical idea of ​​this calculation process is to actively and proactively control the main frequency of the vibration wave generated by the blast. Its ultimate goal is to actively avoid or move away from the protected target, especially the natural frequency range of the turbine hall, in the frequency band where the blast vibration energy is concentrated, thereby fundamentally reducing the risk of resonance.

[0035] The millisecond-level micro-delay design of each detonation zone within a single boiler room is a key means of achieving frequency domain control. (Refer to the attached instruction manual.) Figure 3 The diagram visually illustrates the timing design of this embodiment. By employing high-precision electronic detonators, a series of non-equidistant millisecond-level delays are set for the four detonation zones K4, K3, K2, and K1, forming a carefully arranged "step-like" successive detonation sequence.

[0036] Optionally, in a specific implementation scheme, the K4 axis area is the first detonation zone, which is further divided into four time zones from bottom to top, with delays of 100ms, 150ms, 200ms, and 250ms respectively. Next, the K3 axis area is detonated, which is divided into three time zones according to height, with delays of 220ms, 270ms, and 320ms respectively. Subsequently, the K2 axis area is detonated, which is also divided into two time zones, with delays of 1500ms and 1550ms respectively. Finally, the K1 axis area is the last detonation zone, with a delay of 2500ms, and is usually treated with a weak detonation to form a stable rotating hinge, guiding the entire structure to collapse smoothly to the south, while minimizing the backlash effect on the turbine hall on the north side. The underlying physical logic of this timing arrangement lies in controlling the release rhythm of blasting energy in time and space to actively change the spectral structure of the seismic waves generated by the blast, so that the frequency of its energy peak, i.e. the dominant frequency, is actively shifted to a frequency band that has less impact on the protected target, thereby achieving the fundamental goal of avoiding resonance.

[0037] For the macroscopic delay between partitions, its initial detonation delay The calculations can be performed using the following improved mechanical model formula, which reflects the structural morphological characteristics: ; in, For the first Initial detonation delay of the partition; Based on the basic delay, and depending on engineering experience and site conditions, its value can optionally range from 20ms to 200ms. This is a scaling factor, which optionally ranges from 10ms to 50ms. For the first The direction and span of the collapsed section; For the first Zone center height; This is an exponential coefficient, optionally ranging from 1.2 to 2.0. This formula uses the key parameter, the span-to-height ratio H / L, to determine the stability and collapse dynamics of the structure. It is directly related to the detonation sequence, reflecting the scientific and meticulous nature of the blasting design.

[0038] Next, proceed to step S4, which is the linkage triggering. This step is responsible for accurately converting the carefully calculated delay sequence in step S3 into the actual detonation action. This is done according to the partition number and the calculated delay... The system will sequentially send detonation commands with specified delay information to the electronic detonator arrays in each partition. To ensure precise execution with millisecond-level delays, this embodiment uses high-precision electronic detonators with a single-segment delay accuracy of less than or equal to 1ms. When sending the detonation command, the system will also automatically compensate for the basic delay based on the actual height difference and horizontal distance between adjacent partitions in three-dimensional space, to ensure a smooth and coordinated collapse of the entire boiler room complex during the phased blasting process, avoiding adverse effects caused by timing errors.

[0039] Finally, the most crucial step of this invention, S5, is executed: step-by-step closed-loop correction. This is a fundamental innovation that distinguishes this embodiment from all traditional open-loop blasting modes, marking a shift in blasting control from static design to dynamic adaptation. In the... In each zone, such as Boiler Room #4, after the blast, the intelligent vibration sensor network pre-positioned at key protected locations such as the turbine hall foundation will be immediately triggered, collecting and transmitting in real time the actual ground vibration velocity generated by the blast. The closed-loop feedback module inside the system will process this measured data. The value is related to a safety threshold preset based on the structural grade and importance of the protected building, as well as relevant national standards such as GB6722-2014. Perform a rapid comparison. For example, regarding the turbine room in this project, what is the safety threshold? It can be set to 1.5cm / s.

[0040] If the actual measurement The value did not exceed the safety threshold. This indicates that the current blasting parameters and construction are safe and effective, and the system will default to and continue executing the original plan without adjusting the blasting of subsequent zones. However, once detected... The safety requirements are not met, that is Greater than or close to If the actual vibration response exceeds the theoretical prediction, it indicates that the vibration has deviated significantly from the initial assessment. This could be due to undiscovered local geological variations or other uncertainties. In this case, the system will immediately and automatically initiate an online correction procedure to calculate the correction amount. The predefined functions are as follows: ; in, For subsequent partitioning The correction increment; This is a correction factor, a constant determined based on engineering experience and on-site geological conditions; For actual vibration velocity; This is a preset safety threshold.

[0041] Calculated correction amount This will be immediately applied to the next adjacent zone, such as boiler room #5, as well as the initial detonation delay of all subsequent zones #6 and #3 that have not yet been detonated. The system performs real-time online corrections. This closed-loop control process of "blasting-monitoring-feedback-adjustment" is executed completely after each blast in a zone, thus achieving "rolling optimization" of the parameters throughout the entire blasting and demolition process. Through this online adaptive correction mechanism, it is ensured that blasting vibrations are always strictly and dynamically controlled within a safe range under complex and uncertain on-site conditions.

[0042] By employing the method detailed in this embodiment, four boiler rooms of a power generation company in Zhejiang Province were demolished by blasting. Firstly, the blasting vibration control was elevated to a level of intelligence and precision. Through proactive frequency domain modulation and real-time closed-loop adaptive correction, resonance risks were fundamentally avoided, and uncertainties such as on-site geological conditions were addressed, thereby ensuring the absolute safety of core protected targets, such as the turbine room located only 7.9 meters away. Secondly, the advanced demolition techniques, including DEM-FEM numerical simulation, incorporated into the method, shifted the design of the blasting scheme from relying on traditional experience to precise calculations based on scientific models, greatly improving the stability and predictability of the collapse process. Finally, under the premise of high-level safety assurance, this systematic solution can shorten the total construction period by more than 60% compared to traditional mechanical demolition methods and achieve up to 98% targeted recycling of construction waste. This not only reduces the potential risk of vibration damage compensation but also brings significant economic, social, and environmental benefits.

[0043] Example 2: This embodiment provides a directional collapse blasting system for boiler room groups with dynamic scheduling of zoned center of gravity. This system serves as the physical carrier and execution platform for implementing the blasting method described in Embodiment 1. It is a comprehensive technical system that highly integrates modern measurement, numerical simulation, intelligent control, and real-time communication. It includes the following cooperative and organically connected modules, which together constitute a complete automated process from data acquisition and scheme optimization to closed-loop control.

[0044] The system includes a zone control module, which serves as the task planning unit for the entire system. Internally, it houses a memory and processor, and pre-stores the user interface program. Through this interface, operators can input the areas to be demolished according to the overall construction plan. Information on boiler rooms, and their division into... The specific order of the partitions. In this example, that is, setting... =4, =4, and input the detonation sequence 4#-5#-6#-3#. After processing, this module outputs the defined partition structure and sequence information, providing top-level instructions and basis for the work of all subsequent modules.

[0045] Connected to the zoning control module is a parameter measurement and modeling module, which serves as the data source and foundation for the entire system's analysis. Physically, this module includes a series of high-precision measuring devices deployed on-site, specifically total stations and 3D laser scanners for acquiring structural 3D geometric information and spatial relationships, millimeter-level rangefinders for precise distance measurement, and a monitoring network composed of multiple intelligent vibration sensors. These intelligent vibration sensors are precisely installed on targets requiring key protection, such as the foundation beams and columns of turbine halls and stable surface points near residential areas, and are connected to the system's central processor via wireless or wired connections.

[0046] At the software level, the core of this module is an embedded numerical simulation software based on the Discrete Element-Finite Element (DEM-FEM) coupled algorithm. This software receives data from field measurement equipment in real time via an industrial Ethernet interface, constructs a high-fidelity 3D model, and performs complex mechanical analysis calculations. Its function is to collect the center-of-gravity height of each zone. ,span Horizontal distance from the protected target A site geological survey was conducted to determine the vibration attenuation characteristics, and the height of the center of gravity was determined using high-precision numerical simulation. .

[0047] The parameter measurement and modeling module sends its processed data to the timing calculation and optimization module via a high-speed data bus. This module is the core of the system's decision-making. Its internal processor runs the core algorithm of this embodiment. The module's function is to determine the initial detonation delay for each zone and its internal detonation zone, based on a preset collapse mechanics model and the collected parameters, in order to achieve control of the main frequency of blasting vibration. This includes solidifying the methods used to calculate the initial detonation delay. Mechanical model formula It also includes a set of optimized algorithms specifically designed for frequency domain control of blasting vibrations. This module receives data from the parameter measurement and modeling module, generates an initial, frequency-optimized detonation timing scheme, and sends it to the detonation triggering module. Simultaneously, it remains in standby mode, ready to receive correction commands from the closed-loop feedback module.

[0048] The instruction output of the timing calculation and optimization module is connected to the detonation triggering module, which is the final execution mechanism of the system. The core hardware of this module is a collaborative control system consisting of a high-performance programmable logic controller (PLC) and a dedicated electronic detonator controller. It connects in parallel with all the high-precision electronic detonators deployed on-site via a low-resistance blasting busbar through a physical interface. Its function is to calculate the detonation time according to the zone number and the calculated delay. The system sequentially sends delayed detonation commands to the electronic detonators in each zone, thereby enabling zoned, time-based, and differential detonation of the entire boiler room complex and within each boiler room.

[0049] To achieve system intelligence, a closed-loop feedback and adaptive control module is also included, which is crucial for realizing dynamic scheduling and intelligent control of the system. Functionally, this module forms a key information loop: its input is connected to the intelligent vibration sensor network of the parameter measurement and modeling module, receiving the vibration velocity generated by the blast in real time. Its output is connected to the timing calculation and optimization module, used to issue correction instructions. Inside this module, a high-speed comparator will convert the real-time... Data and preset thresholds The module's function is to collect the vibration velocity generated in real time after detonation in any zone. and with safety threshold In contrast, when safety requirements are not met, the correction amount is calculated online. It also performs online adaptive correction of the detonation delay T for all subsequent undetonated partitions. When correction is needed, the module's internal correction algorithm, i.e. It will be activated, and the correction amount will be calculated. The module then calculates the correction amount. Along with a clear correction instruction, the timing calculation and optimization module is also sent to quickly update the timing schemes for all subsequent unexploded partitions. In this way, these modules together constitute a complete, adaptive, and controllable closed-loop control system.

[0050] In summary, the system constructed in this embodiment, through the tight physical and logical integration of the aforementioned functional modules, forms a highly efficient and reliable automated blasting control platform. During operation, operators first plan the task using the partition control module, after which the system automatically completes parameter acquisition, modeling, initial scheme optimization, and on-site detonation execution. During the blasting process, the closed-loop feedback and adaptive control module safeguards operational safety in real time, achieving intelligent management and control of the entire process of demolishing large building complexes in complex environments. This embodiment integrates advanced measurement methods, precise mechanical models, high-precision numerical simulation, and real-time feedback control, elevating traditional, experience-dependent blasting demolition operations to a new level of systematization, modeling, and intelligence, thereby stably and reliably solving the common vibration control problems in the industry.

Claims

1. A method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity, characterized in that, The method is for The method for orienting the boiler room unit to collapse comprises the following steps: S1. Partition, divide The boiler room is divided into adjacent partitions according to the predetermined demolition sequence and numbered in sequence; S2. Parameter collection, collecting the height of the center of gravity for each partition , span , and the distance to the plane of the nearest protection target , and including geological exploration of the site to determine the vibration attenuation characteristics, and determining the height of the center of gravity in combination with high-precision numerical simulation ; S3. Timing calculation, according to the preset collapse mechanical model, in combination with the parameters collected in step S2, determine the initial initiation delay for each partition and its internal initiation area To regulate the main frequency of blasting vibration and avoid the inherent frequency of the protection target. S4. Linkage trigger, send detonation command with delay to each subarea electronic detonator in turn according to subarea number, the delay is automatically compensated according to the height difference and horizontal distance of adjacent subarea gravity center; S4. Linkage trigger, send detonation command with delay to each subarea electronic detonator in turn according to subarea number, the delay is automatically compensated according to the height difference and horizontal distance of adjacent subarea gravity center; S5. Step-by-step closed-loop correction, at the... After each zone is detonated, the vibration velocity generated is collected in real time. and will With safety threshold In contrast, when When safety requirements are not met, the correction amount is calculated online according to a predefined function. And a detonation delay for the next adjacent and all subsequent undetonated zones. Perform online corrections.

2. The method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity according to claim 1, characterized in that: In step S1, the The division of each zone should avoid the superposition of ground vibration waves generated by blasting in each zone, and provide a time window for the closed-loop correction in step S5.

3. The method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity according to claim 1, characterized in that: In step S2, the high-precision numerical simulation employs a discrete element-finite element coupled algorithm to accurately quantify the impact of preprocessing on the centroid height. The impact.

4. The method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity according to claim 1, characterized in that, In step S3, the initial detonation delay Calculate using the following formula: ； in, For the first Initial detonation delay of the partition; Base delay; This is the proportionality coefficient; For the first The direction and span of the collapsed sections; For the first Zone center height; It is the exponential coefficient.

5. The method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity according to claim 4, characterized in that: The basic delay The value is set to 20–200 ms; the proportionality coefficient is... The value is taken as 10–50 ms; the exponential coefficient is mentioned. Take a value of 1.2 to 2.

0.

6. The method for directional collapse blasting of boiler room groups with dynamic scheduling of zoned center of gravity according to claim 1, characterized in that, In step S5, the online fine-tuning amount Calculate using the following formula: ； in, For subsequent partitioning The correction increment; This is a correction factor; For actual vibration velocity; This is a preset safety threshold.

7. A directional collapse blasting system for boiler room groups with dynamic zoning of center of gravity, characterized in that, include: A partition control module is used to perform step S1 as described in claim 1; A parameter measurement and modeling module is used to perform step S2 as described in claim 1 or 3; The timing calculation and optimization module is used to execute step S3 as described in claim 1 or 4, and to receive correction instructions from the closed-loop feedback and adaptive control module. A detonation triggering module, used to perform step S4 as described in claim 1; The closed-loop feedback and adaptive control module is used to execute step S5 as described in claim 1 or 6, and to calculate the correction amount. The data is then sent to the timing calculation and optimization module.

8. The directional collapse blasting system for boiler room groups with dynamic zoning of center of gravity as described in claim 7, characterized in that: The parameter measurement and modeling module includes a total station, a 3D laser scanner, a millimeter-level distance measuring instrument, an intelligent vibration sensor network, and numerical simulation software with an embedded discrete element-finite element coupling algorithm.

9. The directional collapse blasting system for boiler room groups with dynamic zoning of center of gravity as described in claim 7, characterized in that: The timing calculation and optimization module contains an algorithm for frequency domain control of blasting vibration.

10. The directional collapse blasting system for boiler room groups with dynamic scheduling of zoned center of gravity according to claim 7, characterized in that: The detonation triggering module uses a programmable logic controller and an electronic detonator controller to work together, and sends commands by connecting all electronic detonators in parallel through a low-resistance blasting busbar.

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