深井煤矿TBM掘进巷道围岩扰动特性监测研究

唐彬; 程桦; 唐永志; 王传兵; 侯俊领; 薛维培

深井煤矿TBM掘进巷道围岩扰动特性监测研究

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- 发布日期: 2018-02-19

Monitoring Study on Disturbance Characteristics of Surrounding Rock by TBM Tunneling in Deep Roadway

摘要

摘要: 以张集煤矿TBM掘进采煤工作面高抽巷为研究对象，采用基于布里渊背向散射的分布式光纤传感技术（BOTDR），监测TBM掘进扰动下围岩的变形、扰动特性。通过在试验巷道前方和侧方施工监测钻孔，安装分布式传感光纤，使传感光纤与围岩变形协调。在TBM掘进过程中，通过监测和分析监测光纤的应变分布特征及其动态变化过程，获得了TBM掘进过程中对围岩的扰动特性。TBM掘进时对掌子面前方的岩石扰动影响范围为5～7 m。在围岩深度4～12 m范围内出现压应变,而在围岩深度12～18 m的范围内出现拉应变, 巷道围岩未出现明显的大范围破坏。相较于传统的钻爆法施工，煤矿岩巷TBM法施工掘进效率更高，对围岩扰动更小。
- TBM /
- 煤矿巷道 /
- 光纤传感技术 /
- 掘进扰动 /
- 现场监测 /
- 围岩变形
Abstract: The paper takes high pumping roadway of TBM excavated mining face in Zhangji Coal Mine as study case, we use distributed optical fiber sensing technology based on BOTDR (Brillouin Optical Timedomain Reflectometer) to monitor the deformation and disturbance characteristics of surrounding rock under TBM tunneling. The distributed sensing fiber is installed in the front and side construction of the test roadway and the sensor fiber is installed to coordinate the deformation of the surrounding rock. In the process of TBM tunneling, we obtained disturbance characteristics of surrounding rock caused by TBM tunneling through monitoring and analyzing the strain distribution characteristics of the fiber and its dynamic change process. The influence range of the rock disturbance in front of the palm surface is 5 m to 7 m. The compressive strain appeared within the depth of 4 m to 12 m of the surrounding rock, and strain was found within the depth of 12 m to 18 m of surrounding rock. There is no obvious widespread damage to the surrounding rock. Compared with the traditional drilling blasting method, the construction of the coal mine tunnel TBM method is more efficient and has fewer disturbances to surrounding rock.
- TBM /
- coal mine roadway /
- optical fiber sensing technology /
- excavation disturbance /
- in-situ monitoring /
- surrounding rock deformation

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参考文献(19)

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深井煤矿TBM掘进巷道围岩扰动特性监测研究

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出版历程

Monitoring Study on Disturbance Characteristics of Surrounding Rock by TBM Tunneling in Deep Roadway

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出版历程

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