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酸性淋滤液对碳酸盐岩的溶蚀损伤试验

宗劭康 褚学伟 张佳欣 梁柱 杨凤竹

宗劭康,褚学伟,张佳欣,等. 酸性淋滤液对碳酸盐岩的溶蚀损伤试验[J]. 地质科技通报,2025,44(0):1-10 doi: 10.19509/j.cnki.dzkq.tb20230633
引用本文: 宗劭康,褚学伟,张佳欣,等. 酸性淋滤液对碳酸盐岩的溶蚀损伤试验[J]. 地质科技通报,2025,44(0):1-10 doi: 10.19509/j.cnki.dzkq.tb20230633
ZONG Shaokang,CHU Xuewei,ZHANG Jiaxin,et al. Experimental of dissolution damage to carbonate rocks by acidic phosphate gypsum leachate[J]. Bulletin of Geological Science and Technology,2025,44(0):1-10 doi: 10.19509/j.cnki.dzkq.tb20230633
Citation: ZONG Shaokang,CHU Xuewei,ZHANG Jiaxin,et al. Experimental of dissolution damage to carbonate rocks by acidic phosphate gypsum leachate[J]. Bulletin of Geological Science and Technology,2025,44(0):1-10 doi: 10.19509/j.cnki.dzkq.tb20230633

酸性淋滤液对碳酸盐岩的溶蚀损伤试验

doi: 10.19509/j.cnki.dzkq.tb20230633
基金项目: 国家自然科学基金项目(42062016)
详细信息
    作者简介:

    宗劭康:E-mail:z13930715698@126.com

    通讯作者:

    E-mail:28409807@qq.com

Experimental of dissolution damage to carbonate rocks by acidic phosphate gypsum leachate

More Information
  • 摘要:

    强酸性废水对碳酸盐岩有很强的腐蚀性,可以导致碳酸盐岩的物理力学性质发生重大改变。为了研究酸性淋滤液对碳酸盐岩的溶蚀损伤和力学损伤,通过开展不同流速条件下,不同时长磷石膏酸性淋滤液对灰岩的溶蚀试验研究,分析了试验前后灰岩试样的表观特征、质量、孔隙度、单轴抗压强度以及声发射计数等指标的变化规律,揭示了酸性淋滤液对碳酸盐岩物理力学特性的影响。试验结果表明:岩样的溶蚀率、孔隙度增量与溶蚀时间及淋滤液流速均成正相关关系,力学强度与溶蚀时间及淋滤液流速均成负相关关系。随着溶蚀的进行,岩样表面会附着越来越厚的萤石矿物,使得岩样的溶蚀速率变慢。单轴试样的破坏形式由剪切破坏向张拉破坏逐渐转变。在磷石膏淋滤液溶蚀的酸性环境下,灰岩内部矿物成分被溶解,从而引起宏观力学参数的变化。研究结果可为酸性废水影响条件下岩溶介质稳定性分析、酸性废水处理、尾矿工程安全设计等方面提供理论与试验数据依据。

     

  • 图 1  动态冲刷溶蚀装置

    Figure 1.  Dynamic scouring and dissolution device

    图 2  岩样在不同溶蚀条件下的表观特征与破坏形态

    Figure 2.  Appearance characteristics and damage patterns of samples under different dissolution conditions

    图 3  溶蚀率(a)及平均溶蚀速率(b)的变化特征

    Figure 3.  Variation characteristics of dissolution rate and average dissolution rate

    图 4  孔隙度增量(a)及平均孔隙度增长速率(b)的变化特征

    Figure 4.  Variation characteristics of porosity increment and average porosity growth rate

    图 5  溶蚀机制概念模型图

    Figure 5.  Conceptual model diagram of the dissolution mechanism

    图 6  单轴压缩应力−应变关系曲线

    Figure 6.  Uniaxial compressive stress-strain

    图 7  峰值强度(a)和弹性模量(b)变化特征

    Figure 7.  Peak strength (a) and elastic modulus (b) change characteristic

    图 8  未溶及溶蚀5 d应力−应变−声发射计数图

    Figure 8.  Stress-strain and AE cumulative curves of undissolved and dissolved 5 days

    图 9  0.127cm/s流速下应力−应变−声发射计数图

    Figure 9.  Stress-strain and AE cumulative curves at flow rate of 0.127cm/s

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出版历程
  • 收稿日期:  2023-11-09
  • 录用日期:  2024-02-01
  • 修回日期:  2024-01-26
  • 网络出版日期:  2024-02-28

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