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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摘要

针对目前掘进工作面常常发生冲击地压的实际问题，分析通过电磁波CT探测评价冲击危险性的理论基础，得出了电磁波CT探测与冲击危险性之间的关系，构建以裂隙煤岩对电磁波吸收系数的异常指数BI和梯度指数GI为指标的评价模型，从而建立能够对掘进面围岩划分冲击危险区和危险等级的电磁波CT评价技术，并将其应用于现场实践中。应用表明，评价结果能够对支护及卸压解危措施进行指导和效果检验。该技术探测频率较高(最高达32 MHz)，克服了传统方法因无法对掘进工作面局部围岩进行较高精度探测而导致无法较好评价其冲击危险性的局限，对掘进工作面冲击地压防治具有重要意义。

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关键词 ：采矿工程, 掘进工作面, 冲击危险性评价, 电磁波CT, 吸收系数

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

引用本文:

刘少虹1，2，潘俊锋1，2，秦子晗1，2，王书文1，2，张震1，2，高晓进1，2，李根3. 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[J]. 岩石力学与工程学报, 2017, 36(S2): 4093-4101.
LIU Shaohong1，2，PAN Junfeng1，2，QIN Zihan1，2，WANG Shuwen1，2，ZHANG Zhen1，2，. Research on the risk assessment of rock burst of heading face based on electromagnetic wave CT detection. , 2017, 36(S2): 4093-4101.

链接本文:

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

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