岩石裂隙可视化渗流装置可行性及试验研究  

Feasibility and experimental study of visualized seepage device of rock fracture

作　　者：刘杰[1] 黎照 杨渝南[1] 张子睿 唐洪宇 高进 申剑 LIU Jie;LI Zhao;YANG Yu-nan;ZHANG Zi-rui;TANG Hong-yu;GAO Jin;SHEN Jian(Hubei Geological Disaster Prevention Engineering Technology Research Center,China Three Gorges University,Hubei,Yichang 443002,China;Huadian Tibetan Energy Co.,Ltd.,Lhasa,Tibet 850000,China)

机构地区：[1]三峡大学湖北地质灾害防治工程技术研究中心,湖北宜昌443002 [2]华电西藏能源有限公司,西藏拉萨850000

出　　处：《岩土力学》2020年第12期4127-4136,4144,共11页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.51439003,No.51579138);国家科技支撑计划(No.2015BAB07B08);成都理工大学地质灾害防治与地质环境保护国家重点实验室开放基金(No.SKLGP2016K023);湖北省自然科学基金杰出青年人才计划(No.2018CFA065);三峡大学拔尖人才计划(No.KJ2014H012)。

摘　　要：自主研发一套能从可视化角度反映岩石单裂隙渗流特征的装置,并以模拟岩石的变形模量为主要技术指标,获得了K39透明类岩石材料的添加剂含量为:促进剂0.8%、硬化剂0.6%、消泡剂0.6%;通过二次翻模精确复刻技术得到原岩裂隙面粗糙度,为研究细微观裂隙渗流提供技术支撑。通过可视化装置与原岩装置模拟试验,得到两者之间的差异性系数,进而推出原岩渗流流量的修正公式,获得了渗流量、渗流面积等能反映原岩性能的相关参数。阐明了K39透明类岩石材料对渗流量的影响效应β总及其影响的内在机制;与以ELE仪器为研究平台的渗流试验进行异同性分析,得到两者渗流量之间存在差异的相对变化系数,证明可视化渗流装置研究岩石裂隙渗流是合理可行的。利用该装置开展空间多角度试验,在耦合粗糙度、渗透压、围压、空间多角度、水自重效应等多因素下,通过渗流面积数字化自识别技术为精确获取岩石渗流特征的相关参数提供基础。This study presents a self-developed device that can visually reflect the seepage characteristics of single fracture in rock. Taking the deformation modulus of simulated rock as the main technical index, the additive content of K39 transparent rock material is obtained: accelerator 0.8%, hardening agent 0.6%, defogging agent 0.6%. The roughness of the fracture surface of the original rock is obtained by the accurate re-engraving technique of the second mould turning, which provides technical supports for the study of microscopic seepage flow of fracture. Through the simulation test of the visualization device and the original rock device, the difference coefficient between them is yielded. Furthermore, the modified formula of the seepage flow in original rock is derived. The relevant parameters reflecting rock properties, such as the seepage flow rate and the seepage area, are obtained. The inherent mechanism of the influence of K39 transparent rock material on seepage flow is also clarified. Compared with the seepage test using ELE instrument as research platform, the relative variation coefficient of the difference between the two seepage devices is obtained, which suggests that the visualized seepage device developed in this study is capable in studying the seepage flow in rock fractures. The new device is applied to carry out space multi-angle experiments. Under the influence of multiple factors such as coupling roughness, osmotic pressure, confining pressure, space multi-angle and water self-weight effect, the digital self-identification technology of seepage area provides a foundation for accurately access the relevant parameters of rock seepage characteristics.

关 键 词：可视化渗流装置 K39透明类岩石材料 二次翻模精确复刻技术 数字化自识别技术 

分 类 号：TU411.4[建筑科学—岩土工程]