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首页> 外文会议>ISRM international young scholars' symposium on rock mechanics >Wavelet energy analysis on blasting vibration signal of surrounding rock roof considering confining pressure and fracture
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Wavelet energy analysis on blasting vibration signal of surrounding rock roof considering confining pressure and fracture

机译：小波能量分析围绕压力和裂缝围岩岩屋爆破振动信号

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With increase of excavation depth, confining pressure strength of tunnel is getting higher, and accordingly the accumulated energy of rock roof is also getting bigger. The high accumulation energy will lead to instability failure of tunnel such as roof fall and collapse. In this paper, the blasting vibration response signal of surrounding rock roof was collected by numerical simulation under different confining pressure strength and different roof fractures strength. According to the wavelet energy theory, the response signal was decomposed, then the wavelet frequency band energy distribution of different frequency interval was obtained, meanwhile the influence of confining pressure strength and different roof fractures strength on wavelet frequency band energy distribution was also obtained. The early-warning index of roof stability namely Energy Ratio Variation Deviation (ERVD) were established based on the wavelet energy theory, and the quantitative relationship between ERVD and the stability degree of roof with the change of confining pressure strength was built, which provides a reliable method for stability monitoring of tunnel roof.
机译：随着挖掘深度的增加，隧道的狭窄压力强度越来越高，因此岩石屋顶的积累能量也变得更大。高累积能量将导致隧道的不稳定失败，例如屋顶落下和崩溃。本文在不同狭窄压力强度和不同屋顶裂缝强度下的数值模拟收集了周围岩顶的爆破振动响应信号。根据小波能量理论，响应信号被分解，然后获得了不同频率间隔的小波频带能量分布，同时还获得了狭窄的压力强度和不同屋顶裂缝强度对小波频率带能量分布的影响。基于小波能量理论建立了屋顶稳定性的预警指标，即能量比变化偏差（ERVD），建立了ERVD与屋顶稳定度与限制压力强度的稳定度的定量关系，提供了一种隧道屋顶稳定性监测的可靠方法。

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