含水率和聚丙烯酰胺分子量对重构铁尾矿砂抗剪强度的影响

李涛; 吕春娟; 姜成刚; 张徐; 孙波

doi:10.13961/j.cnki.stbctb.2022.02.013

您当前的位置：

首页 >

文章列表页 >

含水率和聚丙烯酰胺分子量对重构铁尾矿砂抗剪强度的影响

试验研究

- 含水率和聚丙烯酰胺分子量对重构铁尾矿砂抗剪强度的影响
- Effects of Water Content and Polyacrylamide Molecular Weight on Shear Strength of Reconstructed Iron Tailing Sand
- 水土保持通报 2022年42卷第2期页码：89-97
- 作者机构：
  
  山西农业大学资源环境学院, 山西太谷,030801
- 作者简介：
- 基金信息：
  
  国家自然科学青年基金项目“铁矿干排尾矿坡面生态恢复侵蚀调控机理研究”(41401619);山西省自然科学基金项目(202103021224143)
- DOI：10.13961/j.cnki.stbctb.2022.02.013
  中图分类号： S157.1
- 纸质出版：2022
- 稿件说明：
移动端阅览
李涛, 吕春娟, 姜成刚, 等. 含水率和聚丙烯酰胺分子量对重构铁尾矿砂抗剪强度的影响[J]. 水土保持通报, 2022,42(2):89-97.

Li Tao, Lyu Chunjuan, Jiang Chenggang, et al. Effects of Water Content and Polyacrylamide Molecular Weight on Shear Strength of Reconstructed Iron Tailing Sand[J]. Bulletin of Soiland Water Conservation, 2022, 42(2): 89-97.
李涛, 吕春娟, 姜成刚, 等. 含水率和聚丙烯酰胺分子量对重构铁尾矿砂抗剪强度的影响[J]. 水土保持通报, 2022,42(2):89-97. DOI： 10.13961/j.cnki.stbctb.2022.02.013.

Li Tao, Lyu Chunjuan, Jiang Chenggang, et al. Effects of Water Content and Polyacrylamide Molecular Weight on Shear Strength of Reconstructed Iron Tailing Sand[J]. Bulletin of Soiland Water Conservation, 2022, 42(2): 89-97. DOI： 10.13961/j.cnki.stbctb.2022.02.013.

摘要

[目的

]

研究含水率和聚丙烯酰胺(PAM)分子量对重构铁尾矿砂抗剪强度的影响，为铁尾矿砂的边坡稳定和矿区生态修复提供科学依据。[方法

]

通过室内重塑铁尾矿砂开展抗剪强度试验，根据掺土率设置5种土壤(T)和尾矿砂(S)的重构模式，包括S (0)，S

(25% T)，S

(50% T)，S

(75% T)和T (100%)；每种重构模式设置两个含水率水平(15%，20%)，两个聚丙烯酰胺分子量水平(3.00×10

，6.00×10

Da)和3个紧实状态(疏松、偏紧、致密)。[结果

]

①在同一紧实状态下，随含水率的升高，5种重构模式的内摩擦角、黏聚力和抗剪强度均呈现出下降的趋势； ②在同一含水率水平下，随着紧实度的增加，5种重构模式的内摩擦角、黏聚力、抗剪强度整体呈上升的趋势； ③PAM能有效提高重构铁尾矿砂的抗剪强度，且随着分子量增加，抗剪强度增幅减小； ⑤5种重构模式中添加3.00×10

Da分子量的PAM，S

模式的抗剪强度提高较大，水分入渗能力也较强。[结论

]

含水率15%

PAM分子量为3.00×10

Da时，S

的重构模式有利于矿区生态环境的修复和铁尾矿稳定性的提高。

Abstract

[Objective] The effects of water content and molecular weight of polyacrylamide (PAM) on shear strength of reconstructed iron tailing sand were analyzed in order to better understand slope stability and ecological restoration of mining areas. [Methods] An indoor shear strength experiment was conducted by reconstructing iron tailing sand. Five reconstruction soil mixing rate treatments of soil (S) and tailings (T) were established: S (0% T)

S3T1 (25% T)

S1T1 (50% T)

S1T3 (75% T) and T (100% T). Treatments also included two water contents (15%

20%)

two molecular weights of PAM (3.00×106

6.00×106 Da)

and three compaction states (loose

tight

and dense) for each reconstruction pattern. [Results] ① Under the same compaction state

the internal friction angle

cohesion

and shear strength for the five reconstruction patterns all decreased with increasing water content. ② Under the same water content

the internal friction angle

cohesion

and shear strength of the five reconstruction patterns increased with increasing compaction. ③ Addition of PAM effectively improved the shear strength of reconstructed iron tailing sand

and shear strength decreased with increasing molecular weight of PAM. ④ When PAM with a molecular weight of 3.00×106 Da was added into the five reconstruction patterns

the shear strength and water infiltration capacity of S3T1 were greater than for the other reconstruction patterns. [Conclusion] The reconstruction pattern of S3T1 with a water content of 15% and PAM molecular weight of 3.00×106 Da were conducive to the restoration of the ecological environment in mining areas and to the improvement of the stability of iron tailing sand.

关键词

Keywords

references

刘昌鑫,潘健,邓羽松,等.干湿循环对崩岗土体稳定性的影响[J].水土保持学报,2016,30(6):253-258.

卫杰,张晓明,张鹤,等.干湿循环对崩岗不同层次土体无侧限抗压强度的影响[J].水土保持学报,2016,30(5):107-111.

魏玉杰,吴新亮,蔡崇法.崩岗体剖面土壤收特性的空间变异性[J].农业机械学报,2015,46(6):153-159.

Al-Abed N, Amayreh J, Shudifat E, et al. Polyacrylamide(PAM) effect on irrigation induced soil erosion and infiltration [J]. Archives of Agronomy and Soil Science, 2003,49(3):301-308.

曹丽花,赵世伟,梁向峰,等. PAM对黄土高原主要土壤类型水稳性团聚体的改良效果及机理研究[J].农业工程学报,2008,24(1):45-48.

员学锋,吴普特,冯浩.聚丙烯酰胺(PAM)的改土及增产效应[J].水土保持研究,2002,9(2):55-58.

Sepaskhah A R, Shahabizad V. Effects of water quality and PAM application rate on the control of soil erosion, water infiltration and runoff for different soil textures measured in a rainfall simulator [J]. Biosystems Engineering, 2010,106(4):513-520.

刘纪根,雷廷武.坡耕地施加PAM对土壤抗冲抗蚀能力影响试验研究[J].农业工程学报,2002,18(6):59-62.

王中妮,樊恒辉,贺智强,等.分散性土改性剂对土的分散性和抗拉强度的影响[J].岩石力学与工程学报,2015,34(2):425-432.

张婉璐,魏占民,徐睿智,等. PAM对河套灌区盐渍土物理性状及水分蒸发影响的初步研究[J].水土保持学报,2012,26(3):227-231.

陈丹.干排铁尾矿不同土壤重构模式水分运移模拟研究[D].山西太谷:山西农业大学,2019.

Sun Bo, Lyu Chunjuan, Bi Rutian, et al. Effects of polyacrylamide molecular weight and mass concentration on water transport characteristics of iron tailings [J]. Scientific Reports, 2021,11(1):1-15.

胡斐南,魏朝富,许晨阳,等.紫色土区水稻土抗剪强度的水敏性特征[J].农业工程学报,2013,29(3):107-114.

林金石,庄雅婷,黄炎和,等.不同剪切方式下崩岗红土层抗剪特征随水分变化规律[J].农业工程学报,2015,31(24):106-110.

韦杰,史炳林,李进林.紫色土坡耕地埂坎土壤抗剪性能对含水率的响应[J].农业工程学报,2016,32(20):153-160.

施威,魏继红,宋京雷,等.含水率对下蜀土抗剪强度的影响[J].西华大学学报,2016,35(3):99-100.

吕殿青,邵明安,潘云.容重变化与土壤水分特征的依赖关系研究[J].水土保持学报,2009,23(3):209-216.

陈丹,吕春娟,郭星星,等.容重对铁尾矿砂水分运移特征的影响[J].水土保持通报,2019,39(1):82-84.

张健乐,史东梅,刘义,等.土壤容重和含水率对紫色土坡耕地耕层抗剪强度的影响[J].水土保持学报,2020,34(3):164-167.

王健,刘旦旦,张鹏辉.土壤密度对土壤抗侵蚀性的影响[J].灌溉排水学报,2013,32(1):65-68.

王勇,李富程,汪璇,等.聚丙烯酰胺对紫色土坡地耕作位移及土壤结构的影响[J].水土保持学报,2017,31(4):51-56.

Lu Shaoyong, Chen Fangxin, Huu Hao Ngo, et al. Effect of straw and polyacrylamide on the stability of land/water ecotone soil and the field implementation [J]. Ecological Engineering, 2016,94:12-21.

郭天雷,史东梅,卢阳.几种保护措施对紫色丘陵区坡耕地土壤团聚体结构及有机碳的影响[J].水土保持学报,2017,31(2):197-203.

Chen Zhang, Chen Wenlu, Li Chengjun, et al. Effects of polyacrylamide on soil erosion and nutrient losses from substrate material in steep rocky slope stabilization projects [J]. Science of the Total Environment, 2016,54(6):26-33.

李铁,王润泽,谌芸,等. PAM和草类根系对荒坡紫色土物理性质与抗剪性能的影响[J].草业学报,2018,27(2):69-78.

周涛,谌芸,王润泽,等.种草和施用聚丙烯酰胺对荒坡紫色土抗剪和抗蚀性能的影响研究[J].草业学报,2019,28(3):62-73.

Hu Xia, Liu Lianyou, Li Shunjiang, et al. Development of soil crusts under simulated rainfall and crust formation on a loess soil as influenced by polyacrylamide [J]. Pedosphere, 2012,22(3):415-424.

浏览量

685

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

含水率对非饱和原状黄土强度的影响

降雨作用下云南省红土抗剪强度与坡面侵蚀模数的关系

生态防护技术对稀土矿山边坡的固坡效果

香根草应用于铁路边坡防护的力学研究

黄土侧向变形的真三轴试验研究