Underground Cavern Stability Assessment via Segmentation
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Solution Overview
Problem
There is a lack of comprehensive, fast, effective, and standardized quantitative assessment technology for the global stability of surrounding rocks of underground caverns, which is crucial for the development and utilization of underground spaces.
Innovation Solution
A method and apparatus that divide underground caverns into independent units or sections based on initial data, evaluating eight key factors influencing stability using a preset assessment strategy, and accumulating ratings to classify global stability as stable, basically stable, unstable, or understable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional qualitative assessment methods are used for underground cavern stability, then the assessment process is simple, but the assessment lacks quantitative precision and standardization
Solution Approach 1:
The patent divides the underground cavern into multiple independent assessment units (cavern units or sections) based on geological structures, rock mass structure types, lithology, and other initial data. Each unit is assessed independently using the same quantitative framework, which standardizes the assessment process while maintaining precision through systematic segmentation of the complex cavern system.
Solution Approach 2:
The patent transforms qualitative stability assessment into quantitative assessment by introducing eight measurable factors (basic quality index, uniaxial compressive strength, local stability condition, relaxation/damage condition, combined relationship between principal stress direction and cavern axis, combined relationship between structural plane and cavern axis, groundwater conditions, and other influencing factors). Each factor is rated numerically according to preset criteria, enabling quantitative comparison and standardization.
2Measurement precision
If comprehensive multi-factor assessment is implemented, then assessment accuracy improves, but assessment time and efficiency decrease
Solution Approach 1:
By segmenting the cavern into independent units with similar geological and structural characteristics, the patent enables parallel assessment of multiple units simultaneously. This segmentation strategy maintains comprehensive multi-factor evaluation accuracy while reducing overall assessment time through concurrent processing of different cavern sections.
Solution Approach 2:
The patent establishes preset rating criteria and assessment strategies in advance for all eight factors before the actual assessment. The assessment framework, including classification standards (stable, basically stable, understable, unstable) and rating scales, is prepared beforehand, allowing assessors to quickly evaluate each factor without time-consuming on-site calculations or discussions.
3Reliability
If standardized quantitative assessment framework is adopted, then assessment consistency improves, but adaptability to different cavern types decreases
Solution Approach 1:
The patent applies local quality by allowing different weightings or emphasis on various factors based on the specific geological and structural characteristics of each cavern unit. While the overall eight-factor framework remains consistent, the assessment can be tailored to local conditions—for example, emphasizing groundwater factors in karst caverns or structural plane factors in fault-zone caverns—maintaining both consistency and adaptability.
Solution Approach 2:
The patent creates a universal assessment framework that can be applied to different types of underground caverns (hydroelectric, mining, transportation, etc.) through a common set of eight factors. The framework's multi-functionality allows it to serve various assessment purposes (design phase, construction phase, safety evaluation) while maintaining standardized consistency across different cavern types through systematic factor evaluation.
Data Source
AI summary
The present application provides a quantitative assessment method, apparatus and device for global stability of surrounding rocks of underground caverns, which are configured to provide a concrete, practical and effective quantitative assessment solution for a global stability state of the surrounding rocks of the underground caverns. The quantitative assessment method for global stability of surrounding rocks of underground caverns includes: extracting, after determining an assessment task for the global stability of the surrounding rock of a target underground cavern, initial data of the target underground cavern; dividing, according to the initial data, the target underground cavern into different independent cavern units or cavern sections; and rating, according to a preset stability assessment strategy, the eight factors influencing the stability of surrounding rocks of cavern units or the cavern sections are rated respectively, as a global stability assessment result of the target underground cavern.