改进支架结构强度演化规律分析

doi:10.13722/j.cnki.jrme.2014.1730

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Abstract According to special supporting requirements in swelling，extremely soft rock roadway，for the purpose of developing shed support with high-strength，relying on moment analysis of structural mechanics，we analyzed the supports moment distribution under different lateral pressure coefficient. And we also analyzed moment distribution in 5 improved structures of different height in bottom arch，original support with floor beam，original support with roof beam，original support with floor and roof beams，original support with floor，roof beams and other ribs. The results showed that under different lateral pressure coefficient，top and bottom arch demonstrated larger moment and were the main weak plane when support destructed. There was greater impact on strength of bottom arch as height of bottom arch increasing. Based on original support，strength of bottom arch was enhanced obviously when floor beam added，but little effect on top arch and strength of top arch was enhanced obviously when roof beam added，but little effect on bottom arch. Strength of top and bottom arch were enhanced obviously when roof and floor beams added，and the strength coefficient of top and bottom arch was improved to 3.51 and 2.715 when the roof beam closed to top and floor beam closed to bottom. Based on roof and floor beams，braces added in top and bottom arch further，the strength coefficient of top and bottom arch was improved to 3.719 and 2.889 under combination structure of “V” in vault and “” in dome. Consider the economic benefits and the impact of construction on site，we gained the ideal support structure with roof beam closed to top and floor beam closed to bottom.

Key words： mining engineering support structure program design moment analysis key positions strength coefficient

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	Articles by authors
	LI Qinghai1
	2
	SHI Weiping3
	WEN Zhijie4
	QU Guanglong1
	2

Cite this article:

LI Qinghai1,2,SHI Weiping3, et al. ANALYSIS OF STRENGTH EVOLUTION LAW OF IMPROVED SUPPORT STRUCTURES[J]. , 2015, 34(S2): 4295-4307.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1730 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4295

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