期刊论文

Improvement of the tailings properties in a metal mine by microbiological grouting

Zhang, Z.

中文

中国矿业大学学报

1000-1964

2018

47

6

1354-1359

10.13247/j.cnki.jcumt.000871

国家自然科学基金项目（51774187）； 湖南省科技厅重点研发计划课题项目（2017SK2280）； 湖南省教育厅重点科研基金项目（17A184）；

本校为第一且通讯机构

为探究微生物诱导CaCO_3沉淀固化土体技术在尾矿砂中应用的可行性,以巴氏芽孢杆菌为优势菌种,采用自行设计的固化反应发生装置,以浸泡的方式对某金属尾矿砂进行加固试验.通过三轴压缩试验测试固化前后尾砂样品力学性质,研究尾砂强度变化规律,同时测定注浆过程中不同时间段CaCO_3生成量,探讨尾砂强度与CaCO_3生成量之间关系.结果表明:在微生物注浆加固14 d后,砂柱固化明显,在围压为100 kPa下,砂柱直径分别为39.1, 50.0, 65.0 mm的3种尺寸样品的最大轴向应力分别增加了3.06, 3.03, 2.66倍,最大剪应力分别增加了2.22, 2.27, 1.96倍;砂柱最大轴向应力和最大剪应力均随注浆时间的增长而增加,均随砂柱...

To explore the feasibility of the application of CaCO 3 precipitate solidified soil technology induced by microorganism on tailings sand, by using Bacillus pasteurium as the dominant strain, a self-designed curing reaction generating device was used to carry out the reinforcement test of a metal tailings by means of soaking. The mechanical properties of tailings before and after solidification were tested by triaxial compression test to study the change rule of tailing strength. Meanwhile, the production of CaCO 3 during different periods of gr...