裂隙倾角对典型海底金属矿多裂隙围岩流热耦合的影响

doi:10.16265/j.cnki.issn1003-3033.2023.10.0380

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (10): 71-78.doi: 10.16265/j.cnki.issn1003-3033.2023.10.0380

裂隙倾角对典型海底金属矿多裂隙围岩流热耦合的影响

张永亮¹(), 曲敏¹^,²^,^**(), 陈世强³, 牟宏伟¹, 邵兵¹, 范文涛⁴

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

收稿日期:2023-04-13 修回日期:2023-07-18 出版日期:2023-10-28
通讯作者:
**曲敏(1993—),女,山东烟台人,博士研究生,主要研究矿井通风和井下热湿耦合机制。E-mail:19398157660@163.com。
作者简介:
张永亮 (1979—),男,河北唐山人,博士,教授,主要从事矿山安全采矿方面的研究和教学工作。E-mail: zhyoliang@163.com。
陈世强教授
牟宏伟讲师
邵兵副教授
范文涛高级工程师
基金资助:
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)

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

ZHANG Yongliang¹(), QU Min¹^,²^,^**(), CHEN Shiqiang³, MU Hongwei¹, SHAO Bing¹, FAN Wentao⁴

¹ School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao Shandong 266520, China
² School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao Shandong 266520, China
³ School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan Hunan 411201, China
⁴ Mining Management Branch of Shandong Gold Mining Co., Ltd., Ji'nan Shandong 250000, China

Received:2023-04-13 Revised:2023-07-18 Published:2023-10-28

摘要/Abstract

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。

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

Abstract:

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.

Key words: fracture dip, submarine metal mine, multi-fractured surrounding rock, flow-thermal coupling, numerical simulation, seepage field

张永亮, 曲敏, 陈世强, 牟宏伟, 邵兵, 范文涛. 裂隙倾角对典型海底金属矿多裂隙围岩流热耦合的影响[J]. 中国安全科学学报, 2023, 33(10): 71-78.

ZHANG Yongliang, QU Min, CHEN Shiqiang, MU Hongwei, SHAO Bing, FAN Wentao. Effect of fracture dip angle on flow-thermal coupling of multi-fractured surrounding rocks in typical submarine metal mine[J]. China Safety Science Journal, 2023, 33(10): 71-78.

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参考文献 17

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参数	数值	参数	数值
围岩孔隙率	0.1	裂隙孔隙率	0.3
围岩渗透率/ mD	2.1×10^-11	裂隙渗透率/ mD	1×10^-7
围岩密度/ (kg·m^-3)	2 550	地下水密度/ (kg·m^-3)	1 025
围岩比热容/ (J·(kg·K)^-1)	720	地下水比热容/ (J·(kg·K)^-1)	4 196
围岩导热系数/ (W· (m·K)^-1)	1.85	地下水动态黏度/(Pa·s)	1.04×10^-3
比热容率	1	地下水导热性/ (W·(m·K)^-1)	0.56

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 of multi-fractured surrounding rocks in typical submarine metal mine

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