深部煤层开采对盾构斜井的稳定性影响研究

doi:10.13722/j.cnki.jrme.2017.1022

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Abstract

The construction of inclined tunnel by shield method is the first applied in New Street of Shenhua Company in China. The tunnels are excavated by a tunnel boring machine and supported by a 350 mm segmented concrete liner，which is quite different from the traditional way using in a coal mine. In order to study the structural stability of inclined tunnel under deep mining activities，a physical model test is adopted by using a self-developed multi-functional model test bench，and the whole process of shield excavation and coal mining are simulated. During the test，tangential force and displacement of the measuring targets around the liner are measured，safety factor method is used to evaluate the structural safety of the inclined tunnel and finally the suitable coal pillar width under deep high stress is determined. In the same time，during the mining process，the vibration effect by the overlying rock mass collapse on the segment is recorded and the influence of deep mining on structural stability of inclined tunnel under high in-situ stress is analysed. The test results show that the most suitable coal pillar width of the researched cross-section is 108.5 m. Moreover，the most unsafe position appears in the spring line next to the side of excavation. It is found that in deep mining，as the coal excavation，the maximum amplitude of the measuring targets increases，which promotes the cracking of segment.

Key words： mining engineering deep mining inclined shaft segment stability safety factor method

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	Articles by authors
	QI Yi
	LIU Baoguo
	SHI Xiaomeng
	WANG Yan

Cite this article:

QI Yi,LIU Baoguo,SHI Xiaomeng, et al. Stability study of inclined shield tunnels under deep mining[J]. , 2018, 37(S1): 3584-3592.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1022 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3584

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