微生物诱导碳酸盐沉积改善裂隙岩石防渗
性能和强度的试验研究

doi:10.16285/j.rsm.2018.0960

岩土力学 ›› 2019, Vol. 40 ›› Issue (9): 3542-3548.doi: 10.16285/j.rsm.2018.0960

微生物诱导碳酸盐沉积改善裂隙岩石防渗性能和强度的试验研究

邓红卫，罗益林，邓畯仁，伍礼杰，张亚南，彭述权

中南大学资源与安全工程学院，湖南长沙 410083

收稿日期:2018-06-04 出版日期:2019-09-10 发布日期:2019-09-05
作者简介:邓红卫，男，1969年生，博士，副教授，主要从事岩石力学及矿山水害治理的研究
基金资助:
国家自然科学基金（No.51674287，No.51874352）；中南大学研究生自主探索创新项目（No.2017zzts801，No.2018zzts213）。

Experimental study of improving impermeability and strength of fractured rock by microbial induced carbonate precipitation

DENG Hong-wei, LUO Yi-lin, DENG Jun-ren, WU Li-jie, ZHANG Ya-nan, PENG Shu-quan

School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China

Received:2018-06-04 Online:2019-09-10 Published:2019-09-05
Supported by:
This work was supported by the National Natural Science Foundation(51674287, 51874352) and the Independent Exploration and Innovation Project of the Graduate Students of Central South University(2017zzts801, 2018zzts213).

摘要/Abstract

摘要： 微生物诱导碳酸盐沉积（MICP）技术主要利用微生物生命活动与环境反应形成的碳酸盐来修复岩土体。为了研究该技术改善含裂隙岩石防渗性能和强度的效果，利用巴氏芽孢杆菌开展了裂隙黄砂岩的修复试验，并对修复后的裂隙黄砂岩进行了无侧限抗压、核磁共振和电镜扫描（SEM）等测试，分析了巴氏芽孢杆菌对裂隙黄砂岩的修复效果和修复机制。研究表明：巴氏芽孢杆菌对裂隙黄砂岩具有较好的修复效果；修复时间越长，巴氏芽孢杆菌的修复效果越好。修复42 d后，裂隙黄砂岩的孔隙率下降36.41%，防渗性能提升94.62%，抗压强度增加30.52%。巴氏芽孢杆菌具有较好修复效果原因在于，其诱导产生的碳酸钙能够胶结填充物与试样，大幅降低试样的孔隙率，改善其内部孔隙结构的均质性。

关键词: 微生物诱导, 碳酸盐, 矿体强度, 防渗性能, 修复机制

Abstract: Microbial induced carbonate precipitation (MICP) technology mainly uses carbonates formed by microbial life activities and environmental reaction to repair rock and soil. This paper is to study the effect of this technology on improving the impermeability and strength of fractured rock. The repair tests on fractured sandstone were carried out by using Bacillus Pasteurii. Meanwhile, the repaired fractured sandstone was tested under unconfined compression, nuclear magnetic resonance and scanning electron microscope (SEM). The repair effect and mechanism of Bacillus Pasteurii on the fractured sandstone were analyzed. Research shows that Bacillus Pasteurii has good repair effect on fractured sandstone. The longer the repair time is, the better the repair effect of Bacillus Pasteurii is. After 42 days of repair, the porosity of fractured sandstone decreased by 36.41%, the impermeability increased by 94.62%, and the compressive strength increased by 30.52%. The reason for the better repair effect of Bacillus Pasteurii is that the calcium carbonate induced by Bacillus Pasteurii can cement the filler and the sample, and greatly reduce the porosity of the sample, and improve the homogeneity of its internal pore structure.

Key words: microbial induction, carbonate, ore body strength, impermeability, repair mechanism

中图分类号:

TU452

邓红卫, 罗益林, 邓畯仁, 伍礼杰, 张亚南, 彭述权. 微生物诱导碳酸盐沉积改善裂隙岩石防渗性能和强度的试验研究[J]. 岩土力学, 2019, 40(9): 3542-3548.

DENG Hong-wei, LUO Yi-lin, DENG Jun-ren, WU Li-jie, ZHANG Ya-nan, PENG Shu-quan. Experimental study of improving impermeability and strength of fractured rock by microbial induced carbonate precipitation[J]. Rock and Soil Mechanics, 2019, 40(9): 3542-3548.

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微生物诱导碳酸盐沉积改善裂隙岩石防渗性能和强度的试验研究

Experimental study of improving impermeability and strength of fractured rock by microbial induced carbonate precipitation

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微生物诱导碳酸盐沉积改善裂隙岩石防渗 性能和强度的试验研究

Experimental study of improving impermeability and strength of fractured rock by microbial induced carbonate precipitation

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微生物诱导碳酸盐沉积改善裂隙岩石防渗性能和强度的试验研究