基于VIC-3D的含充填裂隙岩石破坏实验研究
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摘要
为了探究含不同固结时间料浆的裂隙岩石在破坏过程中的差异性,基于数字图像相关方法,对料浆固结时间分别为7,14,28d的裂隙花岗岩进行单轴压缩实验,系统地分析了裂隙岩石在破坏过程中的裂纹扩展、贯通规律。研究表明,在裂隙岩石的裂纹扩展过程中,前期均以裂隙尖端形成的翼裂纹主导破坏,后期存在着不同。当固结时间为7d时,裂隙岩石以翼裂纹与次翼裂纹主导破坏;当固结时间为14d时,裂隙岩石则以次翼裂纹主导破坏;当固结时间为28d时,裂隙岩石以翼裂纹、预制裂隙中部的拉裂纹主导破坏。相关成果对地下采矿工程中的裂隙岩体稳定性研究具有一定的参考价值。
In order to explore the difference in the failure process of fractured-filled rocks with different consolidation time of slurry,uniaxial compression experiments were carried out on fractured rock with consolidation time of 7,14,28 dbased on the digital image correlation method.The crack propagation and penetration laws of fractured rock were analyzed systematically.The results showed that in the crack propagation process of fractured rock,the wing crack formed at the crack tip led failure in the early stage,and in the later stage it was different.When the consolidation time was 7 d,the fractured rock was destroyed by wing crack and anti-wing crack.When the consolidation time was 14 d,the fractured rock was dominated by anti-wing crack.When the consolidation time was 28 d,the fracture rock was destroyed by wing crack and tensile crack in the middle of prefabricated crack.The relevant results had a certain reference value for the study of the stability of fractured rock mass in underground mining engineering.
In order to explore the difference in the failure process of fractured-filled rocks with different consolidation time of slurry,uniaxial compression experiments were carried out on fractured rock with consolidation time of 7,14,28 dbased on the digital image correlation method.The crack propagation and penetration laws of fractured rock were analyzed systematically.The results showed that in the crack propagation process of fractured rock,the wing crack formed at the crack tip led failure in the early stage,and in the later stage it was different.When the consolidation time was 7 d,the fractured rock was destroyed by wing crack and anti-wing crack.When the consolidation time was 14 d,the fractured rock was dominated by anti-wing crack.When the consolidation time was 28 d,the fracture rock was destroyed by wing crack and tensile crack in the middle of prefabricated crack.The relevant results had a certain reference value for the study of the stability of fractured rock mass in underground mining engineering.
引文
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[3]柳小胜.中国铁矿床充填采矿实践[J].矿业研究与开发,2012,32(6):7-9.
[4]张波,李术才,杨学英,等.裂隙充填对岩体单轴压缩力学性能及锚固效应的影响[J].煤炭学报,2012,37(10):1671-1676.
[5]尹乾,靖洪文,苏海健,等.单轴压缩下充填正交裂隙花岗岩强度及裂纹扩展演化[J].中国矿业大学学报,2016,45(2):225-232.
[6]董宏宇,孟达,苏传尚,等.注浆充填作用下共面双裂隙砂岩变形破坏特征研究[J].煤炭工程,2017,49(6):88-91.
[7]李广林,郤保平,崔继明.不同地应力下水压裂隙扩展演化数值模拟分析[J].矿业研究与开发,2017,37(10):86-88.
[8]张玉磊,牛昱光,李晓新.基于数字图像处理技术的尾矿坝干滩长度监测[J].矿业研究与开发,2013,33(6):106-108+117.