盐穴储库水溶造腔夹层垮塌块体下落性态及应用

doi:10.13722/j.cnki.jrme.2022.0527

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摘要我国层状盐岩水溶造腔过程中，夹层垮塌形成下落块体可能会碰撞造腔管柱，块体沉积于腔底形成堆积特征。因此，为研究典型夹层块体的自由下落运动性态，以均质铝块为实验样品，通过摄影技术开展水中自由下落室内实验，利用块体重复下落实验初步分析块体落点分布特征，给出块体碰撞造腔管柱的概率定性评估。结果表明：(1) 块体在静止水域中自由下落的运动性态可以分为稳定下落、之字形摇摆运动、翻滚运动和混沌运动4种；(2) 块体自由下落运动性态受自身几何尺寸比(如展宽比、厚宽比)影响较大，对初始条件(如初始角)敏感；(3) 对于厚宽比不超过0.2，展宽比不低于2的块体，在腔内下落时有较大概率碰撞造腔管柱。研究成果可有望应用于优化造腔模拟软件，使盐腔形态预测更符合工程实际，减少造腔管柱被块体砸弯的事故发生。

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	葛鑫博1
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	李银平3
	李金龙4
	施锡林3
	马洪岭3

关键词 ：岩石力学, 盐穴储库, 水溶造腔, 造腔管柱, 夹层垮塌, 自由下落运动性态

Abstract：During cavern leaching in layered salt rock of China，the falling blocks formed by interlayer collapse may collide with the leaching tubing. The falling blocks are deposited on the cavern bottom to form accumulation characteristics. Therefore，laboratory experiments of free-falling homogeneous aluminum blocks in water were carried out using photography，in order to study the free-falling motion behavior of typical interlayer blocks. Based on the repeated block-falling experiment，distribution characteristics of block-falling points were preliminarily analyzed，and the probability of blocks colliding with the leaching tubing was qualitatively evaluated. The results show that：(1) The motion behavior of the free-falling block in still water can be divided into four types：steady falling，zigzag motion，tumbling motion and chaotic motion. (2) The motion behavior of free-falling blocks is greatly affected by its own geometric size ratio(such as length-to-width ratio，thickness-to-width ratio)，and is sensitive to initial conditions(such as initial angle). (3) For blocks with a thickness-to-width ratio of not more than 0.2 and a length-to- length ratio of not less than 2 falling in the cavern，there is a high probability of colliding with the leaching tubing. The research results may be expected to be applied to optimize the simulation software of cavern leaching，so that the shape prediction of salt caverns is more in line with the engineering reality，and the accident of leaching tubing broken by the block is reduced.

Key words： rock mechanics salt cavern storage solution mining leaching tubing interlayer collapse free-falling motion behavior

引用本文:

葛鑫博1，2，3，李银平3，李金龙4，施锡林3，马洪岭3. 盐穴储库水溶造腔夹层垮塌块体下落性态及应用[J]. 岩石力学与工程学报, 2023, 42(4): 918-929.
GE Xinbo1，2，3，LI Yinping3，LI Jinlong4，SHI Xilin3，MA Hongling3. Falling behavior and application of interlayer-collapse-formed blocks during solution mining in salt cavern storages. , 2023, 42(4): 918-929.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0527 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I4/918

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