U型钢支架结构稳定性及其控制技术

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Abstract To control strong deformation of surrounding rock around soft rock roadway with high stress，improving stability of support structure is important besides increasing support strength. The cause of U-steel support instability and support bearing characteristics during working are analyzed by theoretical analysis and laboratory experiment and field test. The technique of steadying support resistance，the principle of support structure compensation and its technique are proposed. The results show that the main reasons of support structure instability are low intensity connector，irrationality structure connector，poor interaction relation between surrounding rock and support，unstable support structure，etc. The corresponding technique，such as connector with high strength and rational structure，is adopted according to the main reasons of the support structure instability. The support bearing capability is unstable after support slipping，and in order to keep a high support resistance during support bearing，the support connector should be re-tightened after support slipping. Though the working resistance can be improved greatly by U-steel backfilling or U-steel back grouting，because of the instability of support structure，the support can still lose its stability. The device of steadying structure is rationally laid out to structural compensate for U-steel support according to the deformation characteristics of surrounding rock and the structural instable type of U-steel support，and it greatly improves the bearing capacity of the whole support and its structural stability.

Key words： mining engineering soft rock roadway with high stress U-steel support structural instability structural compensation device of stable structure

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	Articles by authors
	XIE Wenbing1
	JING Shengguo2
	WANG Tao2
	REN Youkui2
	ZHANG Nong2

Cite this article:

XIE Wenbing1,JING Shengguo2,WANG Tao2, et al. STRUCTURAL STABILITY OF U-STEEL SUPPORT AND ITS CONTROL TECHNOLOGY[J]. , 2010, 29(S2): 3743-3748.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3743

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