基于分形多孔介质非线性流动温度变化的矿井突水预测改进方法

IF 1.2 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Geofluids Pub Date : 2024-12-02 DOI:10.1155/gfl/3854836
Fuli Bo, Jiyuan Zhao, Weitao Liu, Hao Li, Mengke Han
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引用次数: 0

摘要

利用地温变化反映地下水流动状况是矿井突水预测的方法之一。在本研究中,为了使该方法适用于不同的地质条件,基于分形多孔介质的传热理论和非线性水流理论,建立了矿井突水预测的改进方法。首先建立了基于非线性流动临界压力梯度的突水判断准则。然后,基于分形理论,建立了岩体内部结构模型和岩体内部非线性流动的数学模型。最后,建立了热、水力和力学(THM)耦合模型,研究了非线性突水过程和温度变化。基于THM耦合模型的数值模拟结果,建立了改进的方法。结果表明,与传统方法相比,该突水判断准则可以同时考虑完整岩体和破碎岩体的抗水能力,定量计算破碎岩体的抗水能力。改进后的方法适用于不同抗水能力、地温变化范围和梯度、含水层水压的不同情况,提高了地温预测矿井突水的适用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

An Improved Method for Predicting Mine Water Inrush Based on Temperature Changes With Nonlinear Flow in Fractal Porous Media

An Improved Method for Predicting Mine Water Inrush Based on Temperature Changes With Nonlinear Flow in Fractal Porous Media

Using changes in ground temperature to reflect the flow status of groundwater is one of the methods for predicting mine water inrush. In this study, in order to make this method suitable for different geological conditions, an improved method for predicting mine water inrush is established based on the theories of heat transfer and nonlinear water flow in fractal porous media. A water inrush judging criterion based on the critical pressure gradient of nonlinear flow is first established. Then, an internal structural model of the crushed rocks and a mathematical model of nonlinear flow in crushed rocks are derived based on the fractal theory. Finally, a thermal, hydraulic, and mechanical (THM) coupling model is established to study the nonlinear water inrush process and temperature changes. The improved method is established based on the numerical simulation results of the THM coupling model. Results show that the water inrush judging criterion can simultaneously consider the water-resisting capacity of intact and crushed rocks and quantitatively calculate the water-resisting capacity of crushed rocks compared with the traditional method. The improved method is suitable for different cases with different water-resisting capacities, ground temperature change ranges and gradients, and aquifer water pressures, which can improve the applicability of using ground temperature to predict mine water inrush.

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来源期刊
Geofluids
Geofluids 地学-地球化学与地球物理
CiteScore
2.80
自引率
17.60%
发文量
835
期刊介绍: Geofluids is a peer-reviewed, Open Access journal that provides a forum for original research and reviews relating to the role of fluids in mineralogical, chemical, and structural evolution of the Earth’s crust. Its explicit aim is to disseminate ideas across the range of sub-disciplines in which Geofluids research is carried out. To this end, authors are encouraged to stress the transdisciplinary relevance and international ramifications of their research. Authors are also encouraged to make their work as accessible as possible to readers from other sub-disciplines. Geofluids emphasizes chemical, microbial, and physical aspects of subsurface fluids throughout the Earth’s crust. Geofluids spans studies of groundwater, terrestrial or submarine geothermal fluids, basinal brines, petroleum, metamorphic waters or magmatic fluids.
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