粗糙裂隙溶解过程反应性溶质运移特征

doi:10.12068/j.issn.1005-3026.2020.07.013

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (7): 991-998.DOI: 10.12068/j.issn.1005-3026.2020.07.013

粗糙裂隙溶解过程反应性溶质运移特征

王者超，毕竞超，卫如雷，毋振华

(东北大学资源与土木工程学院，辽宁沈阳110819)

收稿日期:2019-06-28 修回日期:2019-06-28 出版日期:2020-07-15 发布日期:2020-07-15
通讯作者: 王者超
作者简介:王者超(1980-)，男，山东高唐人，东北大学教授.
基金资助:
国家自然科学基金资助项目(51779045)；辽宁省“兴辽英才计划”项目(XLYC1807029)；中央高校基本科研业务费专项资金资助项目(N182410001，N180104022)；国家级大学生创新创业训练计划项目(201810145059).

Characteristics of Reactive Solute Transport in the Dissolution Process of Rough Fractures

WANG Zhe-chao， BI Jing-chao， WEI Ru-lei， WU Zhen-hua

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Received:2019-06-28 Revised:2019-06-28 Online:2020-07-15 Published:2020-07-15
Contact: WANG Zhe-chao
About author:-
Supported by:
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摘要/Abstract

摘要： 岩体裂隙中溶质运移受对流、扩散和水岩化学反应三种机制控制.分析了不同机制主导作用下，粗糙裂隙溶解过程中反应性溶质运移特征，并分析粗糙度的影响.研究结果显示，粗糙裂隙溶解过程存在4种类型，分别是均匀、非均匀、极度非均匀和均匀-非均匀溶解.其中对流占主导作用条件下，裂隙发生均匀溶解；化学反应占主导作用条件下，流体上游溶解速率高于下游.初始粗糙度对裂隙溶解过程也具有重要影响:初始粗糙度增大会使水岩化学反应速率增大，同时随着水岩反应的进行，裂隙溶解后粗糙度增大.

关键词: 岩体裂隙, 反应性溶质运移, 溶解类型, 粗糙度, 对流, 水岩化学反应

Abstract: Solute transport in rock fractures is controlled by three mechanisms of convection， diffusion， and water-rock chemical reactions. The characteristics of reactive solute transport during the dissolution of rough fractures under the dominance of different mechanisms were analyzed， and the effect of roughness on solute transport was analyzed. The research results showed that there are four types of rough fractures dissolution processes， viz. uniform， non-uniform， extremely non-uniform， and uniform-non-uniform dissolution. In convection-dominated conditions， the fractures are dissolved uniformly， in chemical reactions dominated conditions， the dissolution rate at upstream of the fluid is higher than that at downstream. The initial roughness also has an important effect on the rough fractures dissolution process. Increasing the initial roughness will increase the water-rock chemical reaction rate， and at the same time， as the water-rock chemical reaction progresses， the fractures roughness will increase after the fractures are dissolved.

Key words: rock fracture, reactive solute transport, dissolution type, roughness, convection, water-rock chemical reaction

中图分类号:

P641.3

王者超，毕竞超，卫如雷，毋振华. 粗糙裂隙溶解过程反应性溶质运移特征[J]. 东北大学学报:自然科学版, 2020, 41(7): 991-998.

WANG Zhe-chao， BI Jing-chao， WEI Ru-lei， WU Zhen-hua. Characteristics of Reactive Solute Transport in the Dissolution Process of Rough Fractures[J]. Journal of Northeastern University Natural Science, 2020, 41(7): 991-998.

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粗糙裂隙溶解过程反应性溶质运移特征

Characteristics of Reactive Solute Transport in the Dissolution Process of Rough Fractures

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