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裂隙岩体流-热耦合传热的三维数值模拟分析
  • 期刊名称:岩土力学
  • 时间:0
  • 页码:2507-2511
  • 语言:中文
  • 分类:TU458[建筑科学—岩土工程;建筑科学—土工工程]
  • 作者机构:[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000, [2]武汉工业学院多孔介质力学研究所,武汉430023
  • 相关基金:国家自然科学基金(No.50804021);辽宁省教育厅基金(N0.20060390)
  • 相关项目:高温矿井采动岩体流固耦合传热机理的研究
中文摘要:

通过对潘西煤矿水文地质条件的分析,基于裂隙岩体的流一热耦合数学模型,描述了裂隙岩体渗流场分布和水流及岩体的温度场分布,并结合边界条件及计算参数对裂隙岩体的流一热耦合传热进行了数值模拟和分析。数值模拟结果表明,岩体内裂隙水流所引发的热量迁移,对裂隙岩体的温度场分布有重要影响。断裂带及地下水流的存在改变了岩体的原有温度场分布。在渗流初期,温度梯度矢量沿渗流方向向两侧岩体方向流动,由于两侧岩体的渗透性系数低于断裂带处的渗透性系数,右侧等温线及温度梯度矢量方向逐渐向渗流方向移动,改变了两侧岩体的温度场分布。通过对断裂带内裂隙水流渗透性系数的折减,分析渗透性系数发生变化时对岩体温度场分布的影响,渗透性系数越大,伴随的热量迁移增大,对岩体的温度场分布的影响也越大。

英文摘要:

By analyzing hydrogeological conditions of Panxi coal, temperature field and seepage field distributions of fractured rock mass are described based on the fluid-heat coupled model. Combined with boundary condition and parameters, the numerical simulation and analysis are carried out by using numerical software. The results of numerical simulation show that the heat transfer resulted from fracture flow has major impact on the temperature field distribution of fractured rock mass. The fault zone and ground water flow's existence change the original temperature field distribution of the rock mass. In the initial period, the vector of temperature gradient flows along the transfusion direction to the both sides. Because the permeability coefficient of rock in the both sides is lower than the fault zone place; the right isothermal line and the temperature gradient vector direction gradually move to the transfusion direction. At the same time, temperature field distribution of the both sides is changed. By the reduction of permeability coefficient, the change of permeability coefficient has impact on the temperature field distribution of fractured rock mass. The permeability coefficient is larger, the thermal migration is larger, the influence on temperature field distribution is also larger.

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