恒阻大变形锚索支护巷道变形机制模型试验研究

doi:10.13722/j.cnki.jrme.2019.0619

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Abstract In order to solve the problem of large deformation of deep soft rock roadways，a kilometer deep roadway in Kouzidong coal mine was taken as the engineering example and the deformation mechanism of surrounding rock of the roadway supported by constant resistance and large deformation(CRLD) anchor cables was studied by means of theoretical analysis and physical model test. Firstly，the semi-circular arch roadway with straight walls was simplified into a circular roadway，and the distribution characteristics of surrounding rock stress and the analytical solution of roadway displacement under constant support force but different stress conditions were obtained based on the theory of elastic mechanics. Secondly，the roadway support experiment with constant resistance anchor cables was designed and carried out based on the similarity theory. The results show that the displacement of the roadway increases with increasing the surrounding rock stress and that，with rising the horizontal tectonic stress，the deformation on both sides of the roadway is gradually larger than that on the roof and the floor，indicating that the tectonic stress has a significant impact on the stability. It is also revealed that the CRLD cable can transfer stresses to the elastic zone，so that the rock mass of the anchorage zone plays a supporting role. The theoretical calculation values of roadway surrounding rock displacement are compared with the monitoring data in the model experiment，and a good agreement is obtained. Comparisons of the roadway deformation between the field monitoring and experimental results also give a good consistence with less than 5% of the surface displacement error of the roadway，which indicates that the model test has certain reference value.

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	Articles by authors
	WANG Jiong1
	2
	ZHANG Zhengjun1
	2
	ZHU Tianci2
	HE Manchao1
	GONG Weili1
	2
	ZHANG Xinyu2

Cite this article:

WANG Jiong1,2,ZHANG Zhengjun1, et al. Model test study on deformation mechanisms of roadways supported by constant resistance and large deformation anchor cables#br#[J]. , 2020, 39(5): 927-937.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0619 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/I5/927

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