高温流动水中注浆模拟的温度扩展双流体跟踪(txTFT)方法

IF 3.4 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
Zhenhao Xu, Zehua Bu, Dongdong Pan, Hao Zhou
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引用次数: 0

摘要

针对高地热环境下的涌水处理问题,提出了一种高温流动水注浆模拟方法:温度扩展-两流体跟踪(txTFT)法。首先,建立了求解浆料停留时间的输运模型。在此基础上,建立了描述浆料与水之间传热的温度传递模型。最后,根据拟合的浆液粘度随停留时间和温度的变化方程,实现浆液粘度的精细表征,进而实现注浆全过程的模拟。利用该方法揭示了岩石裂隙高温流水中注浆的阻断机理。结果表明:高温水限制了料浆的平行扩散,增加了料浆的逆流扩散和横向扩散;水温越高,注浆速率越大,入口压力越低,对流动水流的阻断效果越好。研究结果可为高地热环境下涌水的注浆处理提供理论指导和应用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Temperature Extended-Two-Fluid Tracking (txTFT) Method for Grouting Simulation in High-Temperature Flowing Water

Aiming at the treatment problem for water inflow in a high geothermal environment, we proposed a grouting simulation method in high-temperature flowing water: temperature extended-two-fluid tracking (txTFT) method. First, a transport model for solving the residence time of slurry was derived. Furthermore, a temperature transport model was established to describe the heat transfer between slurry and water. Finally, according to the fitted equation of slurry viscosity with residence time and temperature, the fine characterization of slurry viscosity was realized, and then the whole process simulation of grouting was realized. This method was used to reveal the blocking mechanism for grouting in high-temperature flowing water of rock fractures. The results show that high-temperature water limited the parallel-flow diffusion of slurry and increased the counterflow diffusion and transverse diffusion of slurry. The higher the water temperature, the larger the grouting rate, and the lower the inlet pressure, the better the blocking effect of flowing water. The research results can provide theoretical guidance and application value for the grouting treatment of water inflow in a high geothermal environment.

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来源期刊
CiteScore
6.40
自引率
12.50%
发文量
160
审稿时长
9 months
期刊介绍: The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.
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