Through-the-Earth Blast Signal Mapping for Reliable Detonator Range
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blasting systems using through-the-earth magnetic signal transmission fail to ensure that detonator assemblies are positioned within a reliable signal range, leading to potential misfires and safety hazards due to inadequate signal strength detection.
Innovation Solution
A method involving the use of magnetic field strength meters to define an operative zone with sufficient signal strength, ensuring detonator assemblies are only deployed and tagged within this zone, and using a tagger to manage detonator assembly positioning and communication with a blast controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a blasting system is designed to accommodate multiple types of blasting operations (e.g., coal mining, rock blasting, tunneling), then the adaptability and versatility of the system is improved, but the device complexity increases due to the need for multiple chargers and accessories
Solution Approach 1:
The charger is designed with a universal coupling mechanism that can accommodate different types of blasting operations (coal mining, rock blasting, tunneling, open pit mining) through a single device. The coupling mechanism includes a coupling body with a coupling cavity and coupling rod that can interface with various cartridge types, eliminating the need for multiple specialized chargers while maintaining adaptability across different blasting applications
2Reliability
If the coupling mechanism is designed to be robust and secure to prevent cartridge detachment during blasting, then the reliability is improved, but the ease of operation deteriorates due to difficulty in assembling and disassembling the coupling mechanism
Solution Approach 1:
The coupling mechanism incorporates a dynamic locking system with movable locking elements that can be easily engaged and disengaged. The locking elements are positioned to automatically secure the cartridge during blasting operations while allowing quick manual release for assembly and disassembly operations, thus maintaining both reliability and ease of operation
Solution Approach 2:
The coupling mechanism includes feedback features such as visual or tactile indicators that confirm when the cartridge is properly secured. This feedback system ensures reliable cartridge retention while allowing operators to quickly verify proper assembly without complex procedures, improving both reliability and ease of operation
3Ease of operation
If the charger is designed to be compact and easy to transport, then the ease of operation is improved, but the manufacturing precision requirements increase to ensure proper alignment and function of internal components
Solution Approach 1:
The charger incorporates self-aligning features and tolerance-compensating design elements that allow internal components to automatically align during assembly. The coupling mechanism includes built-in alignment guides and tolerance buffers that maintain proper component alignment even with variations in manufacturing precision, enabling a compact design without compromising functional accuracy
Data Source
Figure 1~2B
Figure 3~4
Figure 5
AI summary
A blasting system (10) wherein a test through-the-earth signal of predetermined strength is sent from a defined position and the strength of the signal, as received at each of a plurality of locations (24) within a blast site, is measured thereby to enable an operative zone (56) to be defined wherein at any location within the operative zone a fire command through-the-earth magnetic signal, of such predetermined strength, transmitted from the defined position, as received at such location, will have a strength above a threshold signal strength.