Drilling Plan Design for Rock Cavern Excavation
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Solution Overview
Problem
Existing drilling plans for rock cavern excavation often fail to accurately account for variations in rock properties, leading to inefficient excavation and increased costs due to deviations from the planned rock surface after blasting.
Innovation Solution
The method involves determining the location of drill hole ends, storing these locations, and analyzing the surface topography of the remaining rock after the first round blast to modify and optimize the drilling plan for subsequent rounds, taking into account the differences between planned and actual outcomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drilling plan is designed in advance based on known facts, then the excavation process can be planned and controlled, but the actual blast outcome deviates significantly from the planned design due to unknown rock properties
Solution Approach 1:
The system performs preliminary actions by determining hole end locations and measuring surface topography before the next round of drilling. This advance preparation allows the drilling plan to be modified based on actual conditions revealed by the previous blast, improving both reliability and adaptability.
Solution Approach 2:
The system implements feedback by using the determined hole end locations and surface topography measurements from the first round to modify the drilling plan for subsequent rounds. This closed-loop approach allows continuous improvement of the drilling plan based on actual blast outcomes and rock conditions.
2Productivity
If the drilling plan parameters are changed to improve pull-out, then excavation efficiency increases, but the complexity of plan design and optimization increases
Solution Approach 1:
The system changes drilling plan parameters such as hole locations, orientations, and lengths based on determined hole end positions and surface topography. This data-driven parameter adjustment improves pull-out and excavation efficiency while the automated calculation methods help manage the complexity of these changes.
Solution Approach 2:
The system performs self-service by automatically determining hole end locations, calculating remaining rock volume, and generating modified drilling plans based on actual blast outcomes. This automation reduces the manual complexity involved in optimizing drilling parameters while improving productivity.
3Measurement precision
If more accurate measurement of hole end locations and surface topography is performed, then the drilling plan can be better optimized, but the time and resources required for measurement increase
Solution Approach 1:
The system replaces manual mechanical measurement methods with automated determination of hole end locations and surface topography measurement. This substitution provides more precise measurements while reducing the time and labor required, as the measurements are integrated into the existing drilling and blasting operations.
Data Source
Figure 1~3
Figure 2~4b
Figure 5a~5d
AI summary
The invention relates to a method and an arrangement for designing a drilling plan (12) for rock cavern excavation. The method defines in advance for a round (26) to be drilled in a tunnel face at least the locations of drill holes (13) in a predetermined coordinate system, using the drilling plan created by means of a computer-assisted design program. The method determines pull-out of a round on the basis of the locations of the hole ends (36) and the topography (28) of the rock remaining after a round blast, and designs or modifies the drilling plan for a subsequent round on the basis of the thus determined pull-out.