Millisecond Blasting Control for Tunnel Vibration Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current millisecond blasting technologies for tunnel excavation lack a systematic approach to determining reasonable delay times, often relying on engineering experience, leading to suboptimal blasting effects and increased vibration damage.
Innovation Solution
A method involving the establishment of a millisecond blasting model using physical and mechanical parameters to simulate the blasting process, analyze vibration curves, and determine optimal blasting parameters, including explosive quantity, hole number, and delay times, to control blasting vibration intensity and reduce damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If millisecond blasting technology is used to divide total explosive quantity into multiple blasting, then blasting effect is improved and blast vibration damages are reduced, but selection of reasonable millisecond time is difficult and often relies on engineering experience leading to suboptimal results
Solution Approach 1:
The patent changes the parameter of millisecond delay time from empirical selection to scientifically determined optimal values. By conducting vibration tests and analyzing the coupling relationship between different millisecond parameters (inter-hole millisecond, inter-row millisecond, intra-package millisecond), the patent identifies specific optimal delay time parameters that maximize blasting effect while minimizing vibration damage.
Solution Approach 2:
The patent implements a feedback mechanism by measuring actual blasting vibration effects and comparing them with predicted values. Through vibration monitoring and data analysis, the patent adjusts and optimizes millisecond time parameters based on real-world performance, creating a closed-loop control system that continuously improves blasting effectiveness.
2Ease of operation
If millisecond time is selected based on engineering experience, then implementation is simple, but blasting vibration intensity cannot be effectively controlled and damage to buildings increases
Solution Approach 1:
The patent performs preliminary vibration tests and theoretical analysis before actual blasting operations. By pre-determining the optimal millisecond time parameters through laboratory testing and numerical simulation, the patent prepares a scientifically validated blasting scheme that can be directly applied in practice, eliminating the need for trial-and-error adjustments during actual operations.
Solution Approach 2:
The patent introduces dynamic optimization of millisecond parameters based on specific blasting conditions. Rather than using fixed empirical values, the patent adjusts millisecond delay times according to rock properties, blast hole configuration, and surrounding environment, making the control system adaptive and condition-specific.
3Ease of operation
If traditional simultaneous blasting is used, then operation is simple, but blasting vibration intensity is high and causes significant damage to surrounding buildings
Solution Approach 1:
The patent segments the simultaneous blasting operation into multiple sequential stages with controlled millisecond delays. By dividing the total explosive quantity into separate packages that detonate in sequence rather than simultaneously, the patent reduces peak vibration intensity while maintaining overall blasting effectiveness. This segmentation is achieved through precise control of delay times between different blast hole groups.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise control of blasting vibration intensity, enhancing the blasting effect while minimizing damage to buildings by determining a target millisecond time and related control strategy, improving the applicability and effectiveness of millisecond blasting in tunneling projects.
Implementation Method 1
make blasting seismic waves generated by the blast holes interfere with each other, weaken a vibration velocity of a medium particle
Implementation Method 2
make blasting seismic waves generated by the blast holes interfere with each other, weaken a vibration velocity of a medium particle
Data Source
AI summary
A reasonable millisecond time control method for excavation blasting of a tunnel is provided, and includes: acquiring physical mechanical parameters to establish a millisecond blasting model, and designing four dimensions blasting parameters of explosive quantity, hole number, inter-hole millisecond and inter-row millisecond; simulating, based on the millisecond blasting model, a blasting process of an explosive package using blasting parameters to obtain a blasting vibration curve; obtaining single-hole blasting vibration waveforms, solving a vibration synthesis curve through a vibration synthesis theory; comparing the vibration synthesis curve with the blasting vibration curve to obtain a coupling relationship of blasting parameters; determining a target group of explosive quantity and hole numbers, determining a target millisecond through the coupling relationship of blasting parameters, and relating a millisecond blasting control strategy to control, and it is used for tunneling project to reduce cut blasting vibration intensity and achieve precise and intelligent control of millisecond blasting.