爆破作用下层状盐穴难溶夹层垮塌效应解析分析

doi:10.13722/j.cnki.jrme.2018.0091

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Abstract In the bedded salt cavern reservoir，the insoluble interbed collapsed under natural conditions is uncontrollable and brings potential danger to the cavern making with water solution and to the operation of storage. Controlled blasting can promote the steerable collapse of the insoluble interbed and speed up the construction of cavity. In order to analyze the effect of the insoluble interbed collapse，a simplified mechanical model for two cases with placing explosives in the interbed and on the interbed plate respectively were established on the basis of the theory of elasticity. The expressions of stress component in the insoluble interbed under blasting loading were derived. Besides，the effect of the interbed collapse under blasting loading was analyzed. In the light of the strength failure criterion of the material，the radii of the broken zones under two kinds of explosive locations were obtained. Theoretical analysis to the interbed collapse in a salt cavern under blasting loading was carried out with the derived formula. The results show that when the explosive is placed in the interbed，the range of decoupling coefficient is between 1.0 to 2.0，the radius of crush zone is 2–4 times of the borehole radius，the radius of rupture zone is 6–9 times of the borehole radius. When the explosive is placed on the interbed plate，the lower part of damage range is larger than the upper part，and tensile failure will occur on the upper edge of the interbed.

Key words： rock mechanics insoluble interbed model simplification collapse analysis strength criterion blasting loading damage zone

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	Articles by authors
	CAI Shuling1
	LI Erbing1
	TAN Yuehu1
	YOU Yechao2
	DUAN Jianli1
	PU Shikun1

Cite this article:

CAI Shuling1,LI Erbing1,TAN Yuehu1, et al. Analytical analysis on collapse effect of insoluble interbed in bedded salt cavern under blasting loading[J]. , 2018, 37(8): 1873-1883.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0091 OR http://www.rockmech.org/EN/Y2018/V37/I8/1873

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