褚学伟, 付海, 王中美,等.灰质白云岩可溶性影响研究[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2022050026

CHU X W, FU H, WANG Z M, et al.Study of the effect of solubility on strongly ashed dolomite[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2022050026

灰质白云岩可溶性影响研究（网络首发）

褚学伟, 付海, 王中美, 张佳欣, 张启林

贵州大学 资源与环境工程学院，贵州 贵阳550025

摘要:为揭示灰质白云岩溶蚀特性，开展不同酸性与流态环境下溶蚀试验，通过分析酸液pH、试样质量与孔隙变 化、钙镁离子释放量等碳酸盐岩溶蚀参量，探讨影响灰质白云岩溶蚀速率的因素。结果表明：（1）酸液pH=3是 电导率值变化由大变小的关键点，突出体现了 H⁺消耗量与钙镁离子生成量的关系；（2）灰质白云岩方解石溶解 速度与溶蚀量均远大于白云石的，在初始酸液摩尔浓度较高条件下溶蚀效果更明显；（3）孔隙数量增加使岩石与 酸溶液接触面积增大，加快了溶蚀速度；（4）杂质充填岩石孔隙减小了酸液对岩石的破坏；（5）高摩尔浓度酸 液（pHW3）与较强流态环境下溶蚀速率更大，对岩石表面可溶物质溶出能力更强，当酸液摩尔浓度较低时（pH ≥4），流态变化对溶蚀速率影响较小。研究结果可为碳酸盐岩溶蚀研究与工程建设提供参考。

关键词:碳酸盐岩;化学溶蚀;矿物组分;水动力条件;溶解差异

中图分类号：P642.25

doi:10.16186/j.cnki.1673-9787.2022050026

基金项目:国家自然科学基金资助项目（42062016）； 国家自然科学基金委员会-贵州喀斯特科学研究中心项目（U16612442）； 贵州大学引进人才科研项目（贵大人基合字[2019]36号）

收稿日期:2022-05-10

修回日期:2022-07-05

网络首发日期: 2022-11-15

Study of the effect of solubility on strongly ashed dolomite(Online)

CHU Xuewei, FU Hai, WANG Zhongmei, ZHANG Jiaxin, ZHANG Qilin

School of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China

Abstract:In order to reveal the dissolution characteristics of strongly tuffed dolomite, dissolution experiments were carried out in different acidic and fluid environments. The dissolution parameters of carbonate rocks, such as acid pH, specimen mass and pore space variation, calcium and magnesium ion release, were analysed, and the factors affecting the dissolution rate of strongly tuffed dolomite were discussed. The results show that: the acid pH=3 is the key point for the change of conductivity from large to small, highlighting the relationship between the consumption of H+ and the production of calcium and magnesium ions; the dissolution rate and dissolution amount of calcite of strongly tuffed dolomite are much larger than that of dolomite, and the dissolution effect is more obvious under the conditions of higher initial acid concentration; the increase of the number of pores increases the contact area between the rock and the acid solution, accelerating the dissolution rate; impurities will fill the rock The increase in the number of pores increases the contact area between the rock and the acid solution, accelerating the dissolution rate; impurities will fill the pores of the rock, reducing the damaging effect of the acid on the rock; the dissolution rate is greater under high acid concentration (pH≤3) and strong flow regime, the stronger the ability to dissolve the soluble material on the rock surface, when the acid concentration is lower (pH ≥4), the change in flow regime has less effect on the dissolution rate.

Key words:carbonate rock;chemical dissolution;mineral composition;hydrodynamic conditions;dissolution difference

CLC：P642.25