Experimental Study on Strength and Permeability Characteristics of Cemented Rock-Tailings Backfill
Experimental Study on Strength and Permeability Characteristics of Cemented Rock-Tailings Backfill
复制标题
水泥尾矿充填体强度及渗透特性试验研究
DOI：
10.3389/feart.2022.802818
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发表时间：
2022-02
影响因子：
2.9
通讯作者：
Chao Huan
中科院分区：
文献类型：
--
作者：
Huafu Qiu;Fushun Zhang;Weibo Sun;Lang Liu;Yujiao Zhao;Chao Huan
为研究不同灰砂比、不同废石掺量的尾砂胶结充填体的强度和渗透特性，分别进行了单轴抗压强度试验和渗透性试验。利用扫描电镜观察了尾砂胶结充填体固化后的孔隙率。研究了灰砂比和废石含量对尾砂胶结充填体内部孔隙率和整体渗透率的影响。试验结果表明，灰砂比和废石含量对充填体的强度和渗透性有一定影响。在灰砂比一定的情况下，随着矸石掺量的增加，充填体的单轴抗压强度和渗透性先增大后减小。当废石含量为10%时，充填体的单轴抗压强度达到最大值，当废石含量为30%时，渗透性达到最大值。由于矸石颗粒在截面上面积的增加，气体通过的面积迅速减小，导致渗透率增长速率降低。当废石掺量一定时，随着灰砂比的降低，由于胶凝材料的减少，充填体在固化过程中产生更多的微裂纹，导致单轴抗压强度降低，渗透性增加。
To study the strength and permeability characteristics of cemented tailings backfill with different cement–sand ratios and different waste rock contents, uniaxial compression strength test and permeability test were carried out respectively. The porosity of cemented tailings backfills after solidification was observed by scanning electron microscope. The effects of cement–sand ratio and waste rock content on the internal porosity and overall permeability of cemented tailings backfill were studied. The test results showed that the cement–sand ratio and waste rock content have certain effects on the strength and permeability of the backfill body. When the cement–sand ratio was fixed, the uniaxial compressive strength and permeability of the backfill body increased first and then decreased with the increase of waste rock content. When the waste rock content was 10%, the uniaxial compressive strength of the backfill body reached the maximum, and when the waste rock content was 30%, the permeability reached the maximum. Due to the increase of the area of waste rock particles in the cross-section, the area of gas passing rapidly decreased, resulting in the decrease of the permeability growth rate. When the waste stone content was fixed, with the decrease of cement–sand ratio, due to the decrease of cementitious materials, more micro-cracks were produced in the curing process of backfill body, resulting in the decrease of uniaxial compressive strength and the increase of permeability.
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DOI：
--
发表时间：
2003
期刊：
Low Temperature Architecture Technology
影响因子：
--
作者：
Y. Qian
通讯作者：
Y. Qian
DOI：
--
发表时间：
2005
期刊：
--
影响因子：
--
作者：
Liu Zhi-yong;Sun Wei
通讯作者：
Liu Zhi-yong;Sun Wei
薄层盐岩地下天然气库洞顶瓦斯泄漏与塌陷研究
影响因子：
9.4
作者：
Liu, Wei;Zhang, Zhixin;Chen, Jie
通讯作者：
Chen, Jie
影响因子：
1.8
作者：
Xiaoshuang Li;Zhifang Liu;Shun Yang
通讯作者：
Xiaoshuang Li;Zhifang Liu;Shun Yang
DOI：
--
发表时间：
2014
期刊：
Journal of University of Science and Technology Beijing
影响因子：
--
作者：
Fu Jian-xi
通讯作者：
Fu Jian-xi