NBPT优化微生物固化尾砂效果的试验研究  

Experimental Study on Optimization of Microbial Curing Tailings Effect by NBPT

作　　者：贾林峰 伍玲玲 胡林 田亚坤 郭要辉 章求才 贺桂成 张志军 JIA Linfeng;WU Lingling;HU Lin;TIAN Yakun;GUO Yaohui;ZHANG Qiucai;HE Guicheng;ZHANG Zhijunu(School of Resource Environment and Safety Engineering,University of South China,Hengyang,Hunan 421001,China;Hunan Province Engineering Technology Research Center for Disaster Prediction and Control on Mining Geotechnical Engineering,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学资源环境与安全工程学院,湖南衡阳市421001 [2]湖南省矿山岩土工程灾害预测与控制工程技术研究中心,湖南衡阳市421001

出　　处：《矿业研究与开发》2021年第4期60-66,共7页Mining Research and Development

基　　金：国家自然科学基金资助项目(51774187,51804164,51974163);湖南省自然科学基金项目(2019JJ50498);湖南省高新技术产业科技创新引领计划(2020SK2024);南华大学“铀矿山岩土工程灾害预测与控制”校级创新团队计划项目(NHCXTD04)。

摘　　要：为解决微生物诱导碳酸钙沉积(MICP)过程中碳酸钙分布不均匀的问题,使用脲酶抑制剂NBPT优化MICP,即在微生物注浆加固过程中短期抑制目标区域生成CaCO_(3)的速率,使试样内CaCO_(3)的分布更均匀。与未加NBPT的试样对比,当添加1%的NBPT时,巴氏芽孢杆菌生长迟滞期延长了8h;当抑制剂含量为1.5%、3%时,生长迟滞期分别延长了20h、48h。微生物注浆加固过程中添加NBPT后,黏聚力和内摩擦角分别提升了8.22%和4.10%。In order to solve the problem of uneven distribution of calcium carbonate in the process of microbial-induced calcium carbonate deposition(MICP),the urease inhibitor NBPT was used to optimize MICP.Namely,in the process of microbial grouting reinforcement,the formation rate of CaCO_(3) in the target area is inhibited in a short time,so that the distribution of CaCO_(3) in the sample is more uniform.Compared with the sample without NBPT,when NBPT was added by 1%,the growth retardation of Bacillus Pasteurella was prolonged by 8 h.When the inhibitor content was 1.5% and 3%,the growth retardation was prolonged by 20 hand 48 h,respectively.After adding NBPT in the process of microbial grouting reinforcement,the cohesion and internal friction angle were increased by 8.22% and 4.10% respectively.

关 键 词：注浆加固 微生物诱导 碳酸钙沉积 脲酶抑制剂 尾砂 

分 类 号：TD926.4[矿业工程—选矿]