Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology

LIU Xiang-yang; CHENG Hua; LI Ming-jing; WANG Xue-song; ZHANG Liang-liang; ZHOU Rui-he

doi:10.16285/j.rsm.2020.1232

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Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology

更新时间：2026-06-25

- Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology
- Vol. 42, Issue 5, Pages: 1373-1380(2021)
- 作者机构：
  
  1. 合肥工业大学土木与水利工程学院,安徽,合肥,230041
  2. 安徽理工大学土木建筑学院,安徽,淮南,232001
  3. 安徽大学资源与环境工程学院,安徽,合肥,230031
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.1232
  CLC： TU45
- Online First：08 May 2021，
  
  Published：2021
- 稿件说明：
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LIU Xiang-yang, CHENG Hua, LI Ming-jing, et al. Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology[J]. 2021, 42(5): 1373-1380.
DOI：

LIU Xiang-yang, CHENG Hua, LI Ming-jing, et al. Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology[J]. 2021, 42(5): 1373-1380. DOI： 10.16285/j.rsm.2020.1232.

摘要

针对岩体劈裂注浆纵向起裂与扩散机制问题，考虑被注岩体的力学特性及地应力因素，分析浆液流变性的运动规律和裂缝的扩展形态，建立了考虑浆液流变性的纵向劈裂扩散模型，给出了纵向劈裂的起劈压力及劈裂通道扩展条件；推导了考虑裂缝几何形态及浆液流变性的纵向劈裂扩散运动方程并得到试验验证。研究表明，纵向劈裂注浆扩散时，除注浆压力与注浆速率因素外，其扩散范围亦受控于注浆段高度、被注岩体强度以及浆液流变性，三者与劈裂扩散半径均负相关，与注浆压力均正相关。岩体强度越高，液黏度越大，劈裂注浆所遇到阻力越高，裂缝扩展越加困难。研究结果可为今后基岩劈裂注浆设计提供理论参考。

Abstract

To investigate the longitudinal initiation and diffusion mechanism of rock fracturing and grouting

the movement law of the rheological property of slurry and the form of the crack propagation are analyzed considering the mechanical properties of the injected rock mass and ground stress. In addition

the longitudinal fracturing diffusion model considering the rheological property of slurry is established

and the initial pressure of longitudinal fracturing and the expansion conditions of fracturing channel are given. Taking the fracture geometry and the rheological property of the slurry into account

the slurry diffusion equation is derived and verified by experiments. Studies have shown that

in addition to the factors such as grouting pressure and grouting rate

the diffusion range is also controlled by the height of the grouting section

the strength of the injected rock body

and the rheological property of the slurry during longitudinal fracture grouting. These influencing factors are all negatively correlated with the fracturing diffusion radius and positively correlated with the grouting pressure. The rock mass with high strength and the liquid with great viscosity can lead to high resistance encountered by the fracturing grouting

which can further result in difficult crack propagation. The research results can provide a theoretical reference for fracture grouting designs of the bedrock in the future.

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