夏开文,王峥,吴帮标,等. 流固耦合作用下深部岩石动态力学响应研究进展[J]. 煤炭学报,2024,49(1):454−478. DOI: 10.13225/j.cnki.jccs.2023.1381
引用本文: 夏开文,王峥,吴帮标,等. 流固耦合作用下深部岩石动态力学响应研究进展[J]. 煤炭学报,2024,49(1):454−478. DOI: 10.13225/j.cnki.jccs.2023.1381
XIA Kaiwen,WANG Zheng,WU Bangbiao,et al. Research progress on dynamic response of deep rocks under coupled hydraulic-mechanical loading[J]. Journal of China Coal Society,2024,49(1):454−478. DOI: 10.13225/j.cnki.jccs.2023.1381
Citation: XIA Kaiwen,WANG Zheng,WU Bangbiao,et al. Research progress on dynamic response of deep rocks under coupled hydraulic-mechanical loading[J]. Journal of China Coal Society,2024,49(1):454−478. DOI: 10.13225/j.cnki.jccs.2023.1381

流固耦合作用下深部岩石动态力学响应研究进展

Research progress on dynamic response of deep rocks under coupled hydraulic-mechanical loading

  • 摘要: 深部岩石处于高地应力、高渗透压和强动态扰动的复杂地质环境之中,3者作用下岩石体更加容易发生损伤破裂,诱发突涌水、渗漏、井喷等工程地质灾害,因而探究流固耦合作用下岩石的动态力学响应是开展岩石工程建设的前提之一。近年来,国内外众多学者在考虑水和不同应力状态下的岩石动态力学实验研究方面取得了显著的成果。为给工程建设提供更加全面的指导并为后续研究奠定基础,从实验装置、测试结果以及围压与水的作用机理层面,对上述工作进行了回顾与总结。首先介绍了分离式霍普金森压杆测试装置的基本原理,以及用于模拟深部岩石赋存环境所进行的装置改进,包括围压分离式霍普金森压杆实验系统和孔压(渗透压)耦合的分离式霍普金森压杆实验系统,简要分析了各类装置在研究流固耦合作用下岩石动力学问题时的优势和不足。其次,总结了考虑不同应力状态(单向加载、三向围压加载)的流固耦合作用下岩石的动态力学响应特性。详细介绍了固定预设孔压、渗透压耦合作用下深部岩石的动态力学响应及其随孔隙水压、渗透压变化的规律。随后,概述了围压对岩石动力学性质的影响机理,分析了不同围压条件下的影响规律;总结了水对岩石动态力学性质的强化、弱化微观机制和定量表达。最后,对流固耦合作用下深部岩石的动态力学响应进行了概括总结,并对未来实验研究工作和深部赋存条件下岩石动态力学的研究方向进行了展望。

     

    Abstract: Deep rock is under a complex geological environment with high geo-stress, high osmotic pressure, and strong dynamic disturbance, under the action of the three, the rock body is more prone to damage and rupture, inducing sudden water surges, seepage, blowouts and other engineering geologic hazards. Therefore, investigating the rock dynamics of the rock under hydraulic-mechanical coupling is one of the prerequisites for conducting rock engineering construction. In recent years, many scholars have obtained some fruitful research results in the study of rock dynamics properties under the consideration of water and different stress states. In order to provide more comprehensive guidance for engineering construction and facilitate the subsequent research, the above work is reviewed and summarized in terms of experimental setups, test results, and the mechanism of the confining pressure and water content. Firstly, the basic principle of the split Hopkinson pressure bar (SHPB) system and the device improvements used to simulate the deep rock storage environment are introduced, including the confine-ment-coupled SHPB system and pore-pressure (osmotic pressure)-coupled SHPB system. The advantages and shortcomings of each type of device in the study of rock dynamics under hydraulic-mechanical coupling are briefly analyzed. Secondly, the dynamic mechanical response characteristics of rocks hydraulic-mechanical coupling considering different stress states (uniaxial confining, triaxial confining) are summarized. The dynamic mechanical response of deep rocks under fixed preset pore pressure and osmotic pressure coupling and its law of variation with pore water pressure and osmotic pressure are described in detail. Subsequently, the mechanism of confining pressure on the dynamic properties of the rock is outlined, and the influence law under different stress states is analyzed. The strengthening and weakening microscopic mechanism and quantitative expression of the dynamic mechanical properties of the rock by water are recapped. Finally, the dynamic response of deep rocks under hydraulic-mechanical coupling is summed up, and the further experimental research work and the research direction of deep rock dynamics are proposed.

     

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