Wireless Blasting Control via Low-Frequency Radio Through Rock
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Solution Overview
Problem
Traditional wired blasting systems in mining operations are labor-intensive, prone to errors, and pose safety risks due to the need for accurate wiring and connections, while existing wireless systems still face challenges in automation and reliability, particularly in underground settings.
Innovation Solution
A method using low-frequency radio waves for wireless communication between blasting machines and components, including calibration and command signals to synchronize clocks and ensure timed actuation of explosive charges, enabling remote control and automation of blasting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired blasting systems are used, then reliable signal transmission is achieved, but labor intensity and safety risks increase due to manual wiring requirements
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless communication system using radio frequency signals. The blasting machine and detonators communicate via electromagnetic waves instead of physical electrical connections, eliminating the need for manual wire installation while maintaining reliable signal transmission for command and data exchange.
Solution Approach 2:
The patent introduces wireless communication signals as an intermediary medium to transmit control commands and data between the blasting machine and detonators. This intermediary replaces the direct physical connection of wired systems, enabling reliable communication without mechanical connections that require manual installation and are prone to errors.
2Extent of automation
If wireless blasting systems are used, then automation capability is improved, but clock synchronization precision deteriorates due to signal transmission delays
Solution Approach 1:
The patent implements a feedback mechanism where the blasting machine transmits timing reference signals to detonators, and detonators report their clock status back to the blasting machine. The system measures signal transmission delays and uses this feedback to calculate compensation values, adjusting the timing references to achieve precise synchronization despite wireless transmission variations.
Solution Approach 2:
The patent performs preliminary clock synchronization before the actual blasting operation. The blasting machine transmits synchronization signals to all detonators in advance, allowing them to adjust their internal clocks and establish a common time reference before automation sequences are executed, ensuring precise timing for the automated loading and firing process.
3Object-affected harmful factors
If wireless communication is used for blasting control, then safety is improved by eliminating physical connections, but signal transmission reliability worsens due to interference and attenuation
Solution Approach 1:
The patent employs parameter changes in the wireless communication system, including selecting specific radio frequency bands that penetrate rock effectively, adjusting transmission power levels, and modulating signal characteristics to overcome attenuation and interference. These parameter optimizations maintain reliable signal transmission while preserving the safety advantages of wireless operation.
4Reliability
If manual wiring is required for blasting setup, then communication reliability is maintained, but productivity decreases due to labor-intensive operations
Solution Approach 1:
The patent replaces the manual mechanical wiring process with automated wireless communication. The blasting machine automatically establishes communication channels with multiple detonators simultaneously via radio frequency signals, eliminating the time-consuming manual wire connection process while maintaining communication reliability through error-checking protocols and signal verification.
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 enhances safety and efficiency by reducing the need for physical connections, allowing for remote setup and precise timing of blasting operations, thereby improving the reliability and safety of wireless blasting systems.
Implementation Method 1
transmitting from a blasting machine at least one command signal to the at least one blasting component... transmitting... a calibration signal having a carrier frequency of from 20-2500 Hz
Implementation Method 2
receiving the calibration signal by the blasting component... processing the calibration signal to: synchronize a clock of the blasting component with a clock of the blasting machine
Data Source
AI summary
Disclosed herein are methods for communicating wireless signals between components of a blasting apparatus, with the intention of conducting a blasting event. In preferred embodiments, the methods are particularly suited to through -rock transmission of wireless command signals, and optionally wireless calibration or synchronization signals, thereby to achieve timed actuation of explosive charges positioned below ground under the control of one or more blasting machines located at or above a surface of the ground, with a high degree of accuracy. Further disclosed are blasting apparatuses and components thereof suitable for use, for example, in conducting the methods of the invention.