基于突变理论的石膏矿矿柱–护顶层支撑体系的破坏分析

doi:10.13722/j.cnki.jrme.2015.1064

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Abstract According to the failure characteristics of pillar-roof system in gypsum mines，and combined with the theory of the nonlinear mechanics，a simplified mechanical model of pillar-roof system was established. Then a cusp catastrophe model of pillar-roof system was build. The failure mechanism of pillar-roof system was analyzed，and the influence of geometric parameters on the stability of the system is analyzed. It is shown that：the stability of pillar-roof system is mainly affected by two factors，namely internal and external factors，and the internal factors indicate that modulus of elasticity of roof，pillar thickness，the width between pillars，pillar area，pillar height and pillar strength. The external factor refers to dead weight of roof and overlying strata. The displacement jump is only related to the internal factor. When regulating the stability of pillar-roof system，the order of these geometrical parameters are：pillar thickness，pillar area，the width between pillars and pillar height. The engineering application shows that the present internal geometric parameters of the mined-out area in Jingmen gypsum mine has reached the sufficient and necessary condition of instability，which consist with field investigation.

Key words： mining engineering gypsum mine pillar roof catastrophe theory

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	Articles by authors
	XIA Kaizong1
	2
	CHEN Congxin1
	2
	LIU Xiumin1
	2
	ZHOU Yichao1
	2
	JIANG Xuanwei1
	2

Cite this article:

XIA Kaizong1,2,CHEN Congxin1, et al. Study of the failure of pillar-roof system in gypsum mines based on catastrophe theory[J]. , 2016, 35(S2): 3837-3845.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1064 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/3837

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