期刊论文

Experimental Study and Numerical Simulation Analysis of Crack Propagation Characteristics of Crisscross Fracture

中文

黄金科学技术

1005-2518

2020

28

04

509-520

10.11872/j.issn.1005-2518.2020.04.029

国家自然科学基金项目“微生物胶结砂岩型地浸铀矿山隔水层的抗渗性能试验及机理研究”（编号：51974163）； 湖南省教育厅重点科研基金“微波照射花岗岩型铀矿石热—力耦合作用机理及热裂断裂机制研究”（编号：18A248）联合资助；

本校为第一机构

岩石内部微裂隙的起裂贯通破坏易引发边坡滑坡、隧道塌方和采场冒顶等工程事故,造成巨大的经济损失和恶劣的社会影响。为了探究裂隙岩石中裂隙演化规律及破坏机理,根据相似理论,采用细沙、白水泥和水按一定比例制作含十字交叉裂隙的类岩石试样,利用RMT-150B岩石力学试验机对其进行单轴压缩试验,并基于室内试验测试结果,建立了含预制十字交叉裂隙岩石试样的PFC数值模拟模型,分析含十字交叉裂隙试样的裂纹起裂、扩展和贯通的演化规律及其失稳破坏机理。研究结果表明:含十字交叉裂隙试样的峰值强度和弹性模量低于完整试样;数值模拟结果的峰值强度、弹性模量、起裂应力和裂隙倾角的变化关系与室内试...

Defects in rocks make their physical properties anisotropic.When subjected to external force,the defect will crack,expand and even destroy.Therefore,it is very important to study its failure behavior to predict the instability of engineering structure.Previous studies are more concentrated on the evolution process of single fracture or non intersecting multi fracture,however,rock fracture often exists in the form of intersecting multi fracture in practical engineering. Based on RMT-150B,the cross fracture rock samples(150 mm×200 mm× 45 mm)wit...