尾矿细微观力学与形变观测试验装置的研制与应用

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (478 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study the inherent relation between the mechanical behavior and the microstructure of the tailings used for building dams，we have developed an observation apparatus of micromechanics and deformation of tailings. It is composed of load device，compression chamber and appurtenances，local stress monitoring system，microscopic observation system. This apparatus has following advantages：(1) Tests performed on this apparatus can show the comprehensive influence of local stress，pore water and porous water pressure，drainage conditions in tailings dams on microstructure and particles motion. (2) The tests by this apparatus can be loaded under the modes of static load，static load and unload，dynamic load，dynamic cyclic load. (3) The compression chamber，which uses the structure of stainless steel cylinder with an inlaid glass fibre reinforced plastic cylinder，can offer the load pressure of 2.5 MPa. (4) When pore water is flowing in tailings，we can observer the movement of pore water and particles，microstructure and its deformation under load，also can monitor the pore water pressure by this apparatus. (5) The local stress can be real-time monitored through installing several pressure transducers inside tailings. (6) The self-made dynamic microscopic observation apparatus，which we have chosen，can be easily adjusted and track the movement of the point. The microscopic observation experiments of tailings are carried out by this apparatus under the loads of 0.3，0.6，0.9 MPa，and the result showes that：with the increasing of the load and the time，the amount and the size of macropores reduce，particles have been bound to clump by weak bound water which is transformed from strong bound water. With the increasing of the load，the displacement increases nonlinearly，and the increment of the displacement become smaller. With the effect of the load，the stress and the microstructure deformation show that：the lower of the specimen lags the upper of specimen，the local stress increases wavily；and the value of peak of local stress changes very heavily；the displacement has a stepped increment，and finally becomes a stable level.

Key words： mining engineering tailings microscopic deformation testing apparatus mechanical properties

Received: 23 December 2010

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I5/926

[1] OKAGBUE C O，YAKUBU J A. Limestone ash waste as a substitute for lime in soil improvement for engineering construction[J]. Bulletin of Engineering Geology and the Environment，1999，58(2)：107–113. [2] SHANG J Q，TANG M，MIAO Z. Vacuum preload consolidation of reclaimed land：a case study[J]. Canadian Geotechnical Journal，1998，35(5)：740–749. [3] 王伟，胡昕，洪宝宁，等. 一种自动跟踪土微观变形的试验方法[J]. 大连理工大学学报，2006，46(增1)：126–129.(WANG Wei，HU Xin，HONG Baoning，et al. An experimental method of automatic tracking soil microstructure deformation[J]. Journal of Dalian University of Technology，2006，46(Supp.1)：126–129.(in Chinese)) [4] 吴义祥. 工程黏性土微观结构的定量评价[J]. 中国地质科学院院报，1991，10(2)：143–150.(WU Yixiang. Quantitative approach on micro-structure of engineering clay[J]. Bulletin of the Chinese Academy of Geological Sciences，1991，10(2)：143–150.(in Chinese)) [5] 沈珠江，陈铁林. 岩土力学分析新理论：岩土破损力学[C]// 中国土木工程学会第九届土力学及岩土工程学术会议论文集. 北京：清华大学出版社，2003：406–411.(SHEN Zhujiang，CHEN Tielin. A new theory of geotechnical analysis：geotechnical damage mechanics[C]// Proceedings of the 9th Academic Conference of the Chinese Society of Civil Engineers on Soil Mechanics and Geotechnical Engineering. Beijing：Tsinghua University Press，2003：406–411.(in Chinese)) [6] ZHANG L M，ASCE M，LI X. Microporosity structure of coarse granular soils[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(10)：1 425–1 436. [7] JOZEFACIUK，GRZEGORZ. Effect of the size of aggregates on pore characteristics of minerals measured by mercury intrusion and water-vapor desorption techniques[J]. Clays and Clay Minerals，2009，57(5)：586–601. [8] TAO G L，ZHANG J R. Two categories of fractal models of rock and soil expressing volume and size-distribution of pores and grains[J]. Chinese Science Bulletin，2009，54(23)：4 458–4 467. [9] 李增华，成秋明，谢淑云，等. 云南个旧期北山七段玄武岩中磁黄铁矿结构变化分形特征[J]. 地球科学：中国地质大学学报，2009，34(2)：275–280.(LI Zenghua，CHENG Qiuming，XIE Shuyun，et al. Application of P-A fractal model for characterizing distributions of pyrrhotites in seven layers of basalts in Gejiu District，Yunnan，China[J]. Earth Science：Journal of China University of Geosciences，2009，34(2)：275–280.(in Chinese)) [10] ATZENI C，PIA G，SANNA U，et al. A fractal model of the porous microstructure of earth-based materials[J]. Construction and Building Materials，2008，22(8)：1 607–1 613. [11] 姬凤玲，吕擎峰，马殿光. 聚苯乙烯轻质混合土强度变形特性的微观试验研究[J]. 兰州大学学报：自然科学版，2007，42(1)：19–23.(JI Fengling，LU Qingfeng，MA Dianguang. Experimental study on microstructure of lightweight EPS-bead-treated soil mechanical behavior[J]. Journal of Lanzhou University：Natural Science，2007，42(1)：19–23.(in Chinese)) [12] HORPIBULSUK S，RACHAN R，CHINKULKIJNIWAT A，et al. Analysis of strength development in cement-stabilized silty clay from microstructural considerations[J]. Construction and Building Materials，2010，24(10)：2 011–2 021. [13] KILFEATHER A A，JAAP J M VAN DER MEER. Pore size，shape and connectivity in tills and their relationship to deformation processes[J]. Quaternary Science Reviews，2008，27(3/4)：250–266. [14] 尹光志，杨作亚，魏作安，等. 羊拉铜矿尾矿料的物理力学性质[J]. 重庆大学学报：自然科学版，2007，30(9)：117–122.(YIN Guangzhi，YANG Zuoya，WEI Zuoan，et al. Physico-mechanical properties of Yang La-copper?s Tailing[J]. Journal of Chongqing University：Natural Science，2007，30(9)：117–122.(in Chinese)) [15] OYANGUREN P R，NICIEZA C G，FERNÁNDEZ M，et al. Stability analysis of llerin rockfill dam：an in-situ direct shear test[J]. Engineering Geology，2008，100(3/4)：120–130. [16] 尹光志，敬小非，魏作安，等. 粗、细尾砂筑坝渗流特性模型试验及现场实测研究[J]. 岩石力学与工程学报，2010，29(增2)：3 710– 3 718.(YIN Guangzhi，JING Xiaofei，WEI Zuoan，et al. Study of model test of seepage characteristics and field measurement of coarse and fine tailings dam[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.2)：3 710–3 718.(in Chinese)) [17] 尹光志，李愿，魏作安，等. 洪水工况下尾矿库浸润线变化规律及稳定性分析[J]. 重庆大学学报，2010，33(3)：72–75.(YIN Guangzhi，LI Yuan，WEI Zuoan，et al. Regularity of the saturation lines? change and stability analysis of tailings dam under the condition of flood[J]. Journal of Chongqing University，2010，33(3)：72–75.(in Chinese)) [18] 曹树刚，刘延保，李勇，等. 煤岩固–气耦合细观力学试验装置的研制[J]. 岩石力学与工程学报，2009，28(8)：1 681–1 690.(CAO Shugang，LIU Yanbao，LI Yong，et al. Research and development of testing apparatus of coal solid-gas coupled micromechanics[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 681–1 690.(in Chinese)) [19] 孙其诚，王光谦. 颗粒物质力学导论[M]. 北京：科学出版社，2009：2.(SUN Qicheng，WANG Guangqian. An introduction to granular material mechanics[M]. Beijing：Science Press，2009：2.(in Chinese))