Rock Drilling Change Detection Using Impact Frequency Deviation
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Solution Overview
Problem
Existing rock drilling systems lack real-time, automated detection of defects and rock quality changes, leading to unnecessary service breaks and requiring separate tools for post-drilling geological analysis, which is time-consuming and inefficient.
Innovation Solution
An apparatus and method using a drilling parameter model to monitor and analyze impact frequency and flushing fluid pressure, enabling real-time detection of short-term and long-term changes in rock drilling, including fractures, cavities, and drill bit wear, without requiring additional tools or modifying the drilling machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual inspections and service programs are used to monitor rock drilling arrangements, then defects can be detected, but defects are only identified at an advanced stage causing unnecessary service breaks and work stoppages
Solution Approach 1:
The system performs preliminary detection of defects by continuously monitoring drilling parameters (impact frequency, flushing fluid pressure, power consumption) before defects develop into critical failures. This allows advance warning and scheduling of maintenance during planned stoppages rather than unexpected breakdowns.
Solution Approach 2:
The system implements continuous feedback monitoring of drilling parameters and compares them against baseline values to detect deviations indicating defects. This real-time feedback enables early defect identification and automated alerts to operators.
2Loss of information
If separate camera arrangements are used for post-drilling geological analysis, then rock quality information can be obtained, but the process is time-consuming and requires additional tools and equipment
Solution Approach 1:
The system merges geological analysis functionality with the existing rock drilling operation by using the drill itself as the analysis tool. Drilling parameter variations provide real-time information about rock quality, eliminating the need for separate post-drilling camera inspections.
Solution Approach 2:
The drilling arrangement performs self-analysis by monitoring its own operational parameters. The drill bit and monitoring system together provide geological information during the drilling process itself, without requiring external analysis tools.
Data Source
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AI summary
An arrangement for recognizing changes in rock drilling is disclosed. Recognized changes can be short-term changes that include cavities, fractures and faults while drilling, or long-term changes, that include wearing of the drill bit. In the arrangement the impact frequency is compared with estimated impact frequency with a give flushing fluid pressure. The difference between the actual impact frequency and the estimated impact frequency can be used in recognizing a change in drilling.