沿空留巷底鼓特性与控制方法研究

doi:10.13722/j.cnki.jrme.2015.1023

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Abstract The observation results of floor heave in the engineering practices of gob-side entry retaining show that floor heave mainly occurs between the first mining period and the second mining period. The floor heave amount is several hundred millimeters，account for 70% of convergence between roof and floor. The cause of floor heave is discussed. Concretely，the floor rockmass is broken after the first mining and then undergo post-peak creep under the action of the first and second mine-induced stress. The floor heave amount is affected by the lithology and stress environment of floor rockmass. Generally，it increases rapidly as the increase of broken degree and principle stress difference. Based on the characteristics of floor heave，the bolt method and steel pile method are proposed to control floor heave. The bolt method can reduce the floor heave amount by its anchoring force，while the steel pile method by its high deformation resistivity and stress arch. The control effect of latter is more significant. The technology of gob-side entry retaining can be further improved to increase the value of its engineering application by the research results.

Key words： mining engineering gob-side entry retaining floor heave creep bolt steel pile

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	Articles by authors
	XU Ying1
	ZHOU Hui2
	BAI Jianbiao1
	CHEN Jin1

Cite this article:

XU Ying1,ZHOU Hui2,BAI Jianbiao1, et al. CHARACTERISTICS AND CONTROL METHOD OF FLOOR HEAVE IN GOB-SIDE ENTRY RETAINING[J]. , 2015, 34(S2): 4235-4244.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1023 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4235

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