开挖卸荷作用下，岩体内部节理、裂隙易发生扩展贯通，极易发生失稳破坏，从而影响工程岩体稳定性。工程实践证明，注浆是修复裂隙岩体、提高围岩稳定性重要的手段。在收集整理国内外研究资料的基础上，对裂隙岩体注浆领域的研究现状进行了全面的归纳和总结，得到了以下关键结论：数十年来，裂隙岩体浆液扩散运移规律取得了较大进展，离散裂隙网络介质理论已成为研究的主流方向，浆液在裂隙内流动的本质是多相流作用下的应力-渗流耦合动态响应与反馈的过程；注浆通过浆液与破碎岩体形成的固结体，显著改善裂隙岩体的物理力学特性，增加整体强度，达到胶结加固的目的；采用离散单元法对裂隙岩体注浆进行数值模拟，能够更好的反应浆液在裂隙中流动扩散的本质。同时，目前关于裂隙岩体注浆问题的研究尚未成熟，现有理论落后于工程实践，其成果大多对实际注浆工程的指导价值有限。因此，结合已有的裂隙岩体注浆理论，运用合理的数值模拟方法，采用适当的模拟试验对岩体注浆关键问题进行深入研究，进而指导现场注浆工艺具有重大意义。对裂隙岩体注浆的发展趋势进行预测，认为以下3个方向是今后研究的重点：(1)建立应力-渗流耦合控制方程，并实现这一动态过程的模拟仿真；(2)建立裂隙岩体工程的锚固注浆联合作用理论；(3)建立适用于深部裂隙岩体注浆的理论体系。 

A geotechnical engineering is prone to instability and failure under excavation unloading. The main reason is related to the expansion and transfixion of internal joints and fracture in rock mass. Grouting is the important means to repair fractured rock mass and improve surrounding rock stability according to the engineering practice. Systematic summary was made regarding the state of fractured rock mass grouting according to the available data，and the key conclusions were obtained：slurry transportation and diffusion law in fracture network have been obtained remarkable achievements during the last several decades，discrete fracture network theory has become the mainstream of research，and the essence of slurry flow in the fracture is the process of stress-seepage coupling dynamic response and feedback under multiphase flow；grouting achieve the purpose of cementation and strengthening through the induration formed by the slurry and the fractured rock mass, which significantly improve the physical and mechanical properties of the fractured rock mass, increase the overall strength；numerical simulation of grouting of fractured rock mass by discrete element method can better reflect the essence of slurry flow diffusion in the fracture. Research on grouting problem in fractured mass at present is far from mature at the same time. The existing theory lags behind the engineering practice, and a large number of scientific research achievements are difficult to turn into practical grouting engineering applications. Combined with the existing grouting theory in fractured rock mass，it is of great significance to use a reasonable numerical simulation method and simulation test to investigate the grouting critical problems in fractured rock mass and to guide the field grouting technology. The future studies are considered to be in the following four directions：① establishment of stress-seepage coupling control equation and numerical simulation realization of the dynamic process；② establishment of anchoring-grouting theory of fractured rock mass engineering；③ establishment of a theoretical system for grouting in deep fractured rock mass.

0 引言

1 裂隙岩体注浆理论研究现状及关键问题

   1.1 裂隙岩体浆液迁移扩散理论

   1.2 单一裂隙浆液流动扩散规律及关键问题

   1.3 裂隙网络浆液流动扩散规律及关键问题

   1.4 裂隙岩体注浆胶结加固机理及关键问题

2 裂隙岩体注浆模拟试验研究现状与关键问题

   2.1 注浆模拟试验概述

   2.2 国内外注浆模拟试验研究现状及关键问题

3 裂隙岩体注浆数值仿真研究现状与关键问题

   3.1 裂隙网络模拟数值仿真

   3.2 注浆数值模拟研究现状

4 讨论

5 结论