爆破扰动下深部卸荷硬岩巷道围岩破坏区域综合监测及处理方法
By performing Hilbert and Hilbert-Huang transforms on radar reflected wave sequences, extracting amplitude and phase sequences, constructing phase-amplitude interferometry terms, and calculating the cumulative damage index, the inaccuracy problem of surrounding rock damage monitoring in deep unloaded hard rock roadways is solved, achieving high sensitivity and stable damage assessment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI UNIV OF SCI & TECH
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing ground-penetrating radar methods are difficult to accurately monitor surrounding rock damage caused by blasting disturbance in deep unloaded hard rock tunnels. They are easily affected by complex rock mass environments, resulting in unstable monitoring results and frequent misjudgments.
By performing Hilbert transform on the radar reflected wave sequence, the amplitude and phase sequences are extracted, a phase-amplitude interference term is constructed and nonlinearly coupled with the amplitude difference term, and the time-varying frequency is extracted by combining Hilbert-Huang transform to construct a frequency domain weighting term. The cumulative damage index is calculated, and the damage area is delineated based on the cumulative damage index.
It achieves highly sensitive monitoring of surrounding rock damage in deep unloading roadways, eliminates geological noise interference, accurately determines the true degree of damage to the surrounding rock and the spatial failure boundary, and improves the stability and accuracy of monitoring.
Smart Images
Figure CN122172152B_ABST