基于电磁波CT探测的掘进工作面冲击危险性评价技术研究

doi:10.13722/j.cnki.jrme.2017.0620

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Abstract

According to the practical problem that at present rock burst often occurs at heading face，analyzed on the basic theory of the rockburst hazard evaluation by electromagnetic wave CT detection，obtained the relationship between electromagnetic wave CT detection and rockburst hazard，established an evaluation model of the abnormal index BI and the gradient index GI of the absorption coefficient of electromagnetic wave in fractured coal and rock，therefore，CT evaluation technique for electromagnetic wave was established，which could define the risk zones of rockburst and the levels of danger of inside and outside supporting area of surrounding rock，and applied to field practice. Application showed that evaluation results could guide and test the effect on supporting and pressure releasing measures. The technique had a high frequency of detection(up to 32 MHz)，overcome the limitation that the traditional method could not evaluate rockburst hazard of the surrounding rock due to being difficult to detect the surrounding rock of heading face with higher precision，which was of great significance to the prevention and control of rock burst in heading face.

Key words： mining engineering heading face risk assessment of rock burst electromagnetic wave CT absorption coefficient

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0620 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS2/4093

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