裂隙倾角对典型海底金属矿多裂隙围岩流热耦合的影响  

Effect of fracture dip angle on flow-thermal coupling ofmulti-fractured surrounding rocks in typical submarine metal mine

作　　者：张永亮 曲敏 陈世强 牟宏伟 邵兵 范文涛 ZHANG Yongliang;QU Min;CHEN Shiqiang;MU Hongwei;SHAO Bing;FAN Wentao(School of Mechanical&Automotive Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China;School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China;School of Resource&Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China;Mining Management Branch of Shandong Gold Mining Co.,Ltd.,Ji'nan Shandong 250000,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520 [2]青岛理工大学环境与市政工程学院,山东青岛266520 [3]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [4]山东黄金矿业股份有限公司矿业管理分公司,山东济南250000

出　　处：《中国安全科学学报》2023年第10期71-78,共8页China Safety Science Journal

基　　金：国家自然科学基金资助(51874187);山东省自然科学基金资助(ZR2018MEE002);山东省高等学校优秀青年创新团队项目(2019KJH008)。

摘　　要：为探究裂隙倾角对三山岛金矿多裂隙围岩流热耦合的影响,基于三山岛海底矿体测量数据建立多裂隙围岩流热耦合模型,应用COMSOL Multiphysics将三维裂隙降维简化,分析裂隙倾角在流热耦合过程中对渗流场中裂隙出口流量、渗流速度以及对温度场中的传热时间、温度分布、裂隙出口温度的影响。结果表明:离散裂隙的倾角对渗流场和温度场有明显的控制作用。地热水的渗流速度随着与入口处距离的增加总体呈现先减小后平稳流动最后增大的趋势,随着时间的推移裂隙出口流量皆呈现出不断减小的趋势;裂隙围岩距离巷道越远温度越高,不同裂隙倾角附近围岩的等温线分布明显不规则。In order to study the effects of fracture dip angle on the flow-thermal coupling of multi-fractured surrounding rocks,a model of flow-thermal coupling of multi-fractured surrounding rocks in metal mines was established with Sanshan Island submarine metal mine as the engineering background.COMSOL Multiphysics was used to simplify the dimensionality reduction of three-dimensional fracture.What's more,the influence of the fracture dip angle on the outlet flow rate and seepage velocity of the fracture in the seepage field was studied,as well as the heat transfer time,temperature distribution and fracture outlet temperature in the temperature field during the flow-thermal coupling process.The results show that the dip of discrete fractures have obvious control on the seepage and temperature field of surrounding rock.The seepage velocity of geothermal water shows an overall trend of first decreasing,then flowing steadily,and finally increasing with the increase of the distance from the inlet.As time goes on,the flow rate at the crack outlet shows a continuous decreasing trend.The farther the fractured surrounding rock is from the roadway,the higher the temperature is,and the isotherm distribution of surrounding rock near different fracture dip angles is obviously irregular.

关 键 词：裂隙倾角 海底金属矿 多裂隙围岩 流热耦合 数值模拟 渗流场 

分 类 号：X936[环境科学与工程—安全科学]