海底金属矿围岩裂隙倾角、开度对渗流特性的影响

doi:10.16265/j.cnki.issn1003-3033.2023.09.1311

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (9): 164-172.doi: 10.16265/j.cnki.issn1003-3033.2023.09.1311

海底金属矿围岩裂隙倾角、开度对渗流特性的影响

付翠翠¹(), 张永亮¹^,^**(), 曲敏¹, 殷诗理¹, 刘云飞¹, 王明斌²

¹ 青岛理工大学安全科学与工程系,山东青岛 266520
² 山东黄金矿业(莱州)有限公司三山岛金矿,山东烟台 264010

收稿日期:2023-03-11 修回日期:2023-06-12 出版日期:2023-09-28
通讯作者:
**张永亮(1979—),男,河北唐山人,博士,教授,主要从事矿山深井灾害预防与治理方面的研究。E-mail:zhyoliang@163.com。
作者简介:
付翠翠 (1996—),女,山东青岛人,硕士,主要从事深部矿井湿热治理及灾害防治方面的工作。E-mail:fucc0825@163.com。
基金资助:
国家自然科学基金资助(51874187); 山东省高等学校优秀青年创新团队(2019KJH008)

Effects of fracture dip and aperture of submarine metal mine surrounding rock on seepage characteristics

FU Cuicui¹(), ZHANG Yongliang¹^,^**(), QU Min¹, YIN Shili¹, LIU Yunfei¹, WANG Mingbin²

¹ Department of Safety Science and Engineering, Qingdao University of Technology, Qingdao Shandong 266520, China
² Sanshandao Gold Mine, Shandong Gold Mining (Laizhou) Co., Ltd., Yantai Shandong 261442, China

Received:2023-03-11 Revised:2023-06-12 Published:2023-09-28

摘要/Abstract

摘要：

为探究海底金属矿高承压围岩裂隙倾角、开度对渗流特性的影响,揭示海底金属矿高承压围岩裂隙倾角及开度对渗流速度、出口流量的影响特征,以海底金属矿三山岛新立矿区为工程背景,基于裂隙状态与渗流速度耦合理论建立围岩多裂隙渗流模型,应用COMSOL Multiphysics数值模拟软件,通过改变裂隙倾角和开度得到地下水在深井围岩裂隙中渗流速度、出口流量的变化情况。结果表明:裂隙倾角会对地下水渗流速度产生重要影响,多裂隙相交使地下水渗流速度发生突变,在模拟倾角范围内,裂隙倾斜角度越大,地下水出口渗流速度越小,出口流量越小,裂隙相交处渗流速度突变越明显。当裂隙开度处于0.5~2 mm时,裂隙相交处渗流速度发生明显突变,裂隙开度大小对渗流量影响显著。

关键词: 海底金属矿, 裂隙倾角, 裂隙开度, 渗流速度, 渗流特性

Abstract:

In order to study the influence of fracture inclination and opening degree of high pressure surrounding rock of undersea metal mine on seepage characteristics and reveal the influence law of fracture inclination and opening degree of high pressure surrounding rock of undersea metal mine on seepage velocity and outlet flow, a multi-fracture seepage model of surrounding rock was established based on the coupling theory of fracture state and seepage velocity in Xinli mining area of Sanshandao, an undersea metal mine. The numerical simulation software COMSOL Multiphysics was applied to obtain the change of seepage velocity and outlet flow of groundwater in the crack of surrounding rock of a deep well by changing the crack dip Angle and crack opening. The results show that the Angle of fracture inclination has an important influence on the seepage velocity of groundwater, and the intersection of multiple fractures causes sudden changes in the seepage velocity of the groundwater. In the range of simulated inclination Angle, the larger the Angle of fracture inclination, the smaller the seepage velocity of groundwater outlet, the smaller the outlet discharge, and the more obvious the seepage velocity change at the intersection of cracks. When the crack opening is between 0.5 and 2 mm, the seepage velocity at the intersection of the crack changes obviously, and the crack opening has a significant effect on the seepage flow.

Key words: subsea metal mine, fracture dip, fracture aperture, seepage velocity, outlet flow

付翠翠, 张永亮, 曲敏, 殷诗理, 刘云飞, 王明斌. 海底金属矿围岩裂隙倾角、开度对渗流特性的影响[J]. 中国安全科学学报, 2023, 33(9): 164-172.

FU Cuicui, ZHANG Yongliang, QU Min, YIN Shili, LIU Yunfei, WANG Mingbin. Effects of fracture dip and aperture of submarine metal mine surrounding rock on seepage characteristics[J]. China Safety Science Journal, 2023, 33(9): 164-172.

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工况	裂隙Ⅱ 倾角/(°)	裂隙开度/mm	研究目的
1	45, 60, 75, 90	1	裂隙Ⅱ倾角对裂隙Ⅱ中地下水渗流特性的影响
1	45, 60, 75, 90	1	裂隙Ⅱ倾角对裂隙Ⅳ中地下水渗流特性的影响
2	90	0.1, 0.5, 0.75,1.25, 2	裂隙开度对裂隙Ⅱ中地下水渗流特性的影响
2	90	0.1, 0.5, 0.75,1.25, 2	裂隙开度对裂隙Ⅳ中地下水渗流特性的影响

流体(水)		围岩		裂隙
密度/ (kg·m^-3)	动力黏度/ (Pa·s)	孔隙率/%	渗透率/μm²	孔隙率/%	渗透率/μm²
1 000	0.001	0.1	9.81	0.3	2.06×10⁴

海底金属矿围岩裂隙倾角、开度对渗流特性的影响

Effects of fracture dip and aperture of submarine metal mine surrounding rock on seepage characteristics

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