围岩外加固抗爆炸成坑试验研究

发布时间：2018-04-11 14:04

  本文选题：岩石力学 + 抗爆炸性能　； 参考：《岩石力学与工程学报》2017年10期

【摘要】：为进一步提升洞库围岩的抗爆炸性能,采用相似模型试验方法对采用交叉锚索进行加固的均质、层状和块状围岩进行2组爆炸成坑试验,并对比分析加固前后围岩模型的宏观破坏形态、隆起形态、裂缝形态及爆坑尺寸。研究结果表明:(1)交叉锚索对岩体提供了较大的抗拉、抗剪能力,从而对岩体抗爆炸成坑具有较强的加固作用;(2)岩体特征对成坑试件破坏程度有较大影响;(3)从有加固的试件表面隆起高度上看,均质和层状岩体试件的都较小,块状岩体试件的较大;(4)岩体特征不同,试件表面的裂缝形态不同;(5)有加固试件的爆坑平面尺寸均质岩体试件的最小,块状的较大,层状的最大。研究结果可为地下防护工程设计和坑道围岩加固提供参考。
[Abstract]:In order to further improve the explosion resistance of the surrounding rock of the cavern, two groups of explosive pit formation tests were carried out on the homogeneous, layered and massive surrounding rock reinforced by cross-anchored cables by using the similar model test method.The macroscopic failure form, uplift shape, crack shape and crater size of surrounding rock model before and after reinforcement are analyzed.The results show that the cross-anchoring cable provides a large tensile and shear resistance to the rock mass.Therefore, the rock mass characteristics have a great influence on the failure degree of the crater specimens. From the height of the surface uplift of the specimens with reinforcement, the homogeneous and stratified rock mass specimens are smaller.The fracture morphology of the surface of the specimen is different. 5) the specimen with reinforced specimen has the smallest, larger block and the largest layer of the flat size homogeneous rock mass specimen.The results can be used as reference for underground protection engineering design and surrounding rock reinforcement.
【作者单位】： 空军工程设计研究局;中国水利水电科学研究院岩土工程研究所;军委后勤保障部工程兵科研三所;
【分类号】：TU45
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本文编号：1736307