黄金科学技术 ›› 2022, Vol. 30 ›› Issue (6): 912-922.doi: 10.11872/j.issn.1005-2518.2022.06.116
• 采选技术与矿山管理 • 上一篇
王晓军1,2(),钟启平1,2,胡凯建1,2,汪豪1,2,王宇1,2,李立浩1,2,冯亮1(
)
Xiaojun WANG1,2(),Qiping ZHONG1,2,Kaijian HU1,2,Hao WANG1,2,Yu WANG1,2,Lihao LI1,2,Liang FENG1(
)
摘要:
为了研究稀土矿滑坡发生剪切破坏时的力学性质,以赣南离子吸附型稀土矿为研究对象,运用微震监测技术在室内环境下对重塑土试样开展了直接剪切试验,利用微震监测记录设备同步采集稀土试样试验过程中的微震信号,对以含水率表征的不同浸渗状态下试样的力学特性和微震信号特征进行了研究。结果表明:(1)随着试样含水率的增大,黏聚力显著下降,趋于饱和阶段时黏聚力下降速率减缓,由应变软化型转变为应变硬化型。(2)剪切过程波形幅值短时大幅提升,时频和波形图像对比分析表明存在微震信号且其主频率为10~20 Hz,含水率变化并不会影响信号主频;随着含水率的增加,剪切过程信号具有更高峰值振幅,整体释放能量增加,由主震型向群震型演变。研究结果可作为稀土矿发生滑坡破坏时微震信号的判别依据。
中图分类号:
Berg N, Smith A, Russell S,et al,2018.Correlation of acoustic emissions with patterns of movement in an extremely slow-moving landslide at Peace river,Alberta,Canada[J].Canadian Geotechnical Journal,55(10):1475-1488. | |
Chen Fei, Wu Yaxing, Gao Yang,et al,2015.Application of composite soil retaining structure in prevention of rare earth mining landslide[J].Journal of the Chinese Society of Rare Earths,33(6):761-768. | |
Chen Qiao, Zhang Kuo, Chen Jilong,et al,2020.Experimental study on infrasound monitoring during soil shear failure[J].Chinese Journal of Theoretical and Applied Mechanics,52(3):877-889. | |
Chi Ru’an, Liu Xuemei,2019.Prospect and development of weathered crust elution deposited rare earth ore[J].Journal of the Chinese Society of Rare Earths,37(2):129-140. | |
Chi Ru’an, Tian Jun,2007.Review of weathered crust rare earth ore[J].Journal of the Chinese Society of Rare Earths,(6):641-650. | |
Cui Wenjie, Teng Pengxiao, Han Baokun,2018.Characteristics of infrasound signals just before landslide [J].Technical Acoustics,37(2):157-162. | |
Dixon N, Smith A, Flint J A,et al,2018.An acoustic emission landslide early warning system for communities in low-income and middle-income countries[J].Landslides,15(8):1631-1644. | |
Dixon N, Spriggs M P, Smith A,et al,2015a.Quantification of reactivated landslide behaviour using acoustic emission monitoring[J].Landslides,12(3):549-560. | |
Dixon N, Smith A, Spriggs M,et al,2015b.Stability monitoring of a rail slope using acoustic emission[J].Proceedings of the Institution of Civil Engineers-Geotechnical Engineering,168(5):373-384. | |
Feng L, Pazzi V, Intrieri E,et al,2019.Rockfall seismic features analysis based on in situ tests:Frequency,amplitude,and duration[J].Journal of Mountain Science,16(5):955-970. | |
Fiolleau S, Jongmans D, Bièvre G,et al,2020.Seismic characterization of a clay-block rupture in Harmalière landslide,French Western Alps[J].Geophysical Journal International,221(3):1777-1788. | |
Gustafsson F,1996.Determining the initial states in forward-backward filtering[J]. IEEE Transactions on Signal Processing,44(4):988-992. | |
Huang Wanfu, Zou Zhiqiang, Zhong Xiangxi,et al,2017.Occurrence characteristics and leaching rules of different weathering rare earth ores[J].Journal of the Chinese Society of Rare Earths,35(2):253-261. | |
Jiang Y, Wang G H, Kamai T,2017.Acoustic emission signature of mechanical failure:Insights from ring-shear friction experiments on granular materials[J].Geophysical Research Letters,44(6):2782-2791. | |
Lee G, Gommers R, Waselewski F,et al,2019.PyWavelets:A Python package for wavelet analysis[J].Journal of Open Source Software,4(36):1237. | |
Liu D L, Leng X P, Wei F Q,et al,2015.Monitoring and recognition of debris flow infrasonic signals[J].Journal of Mountain Science,12(4):797-815. | |
Nanjing Hydraulic Research Institute,1999. Specification of soil test: [S].Beijing:China Water & Power Press. | |
Sun L J, Wu H G, Cheng Q H,2019.A multilayer shear model box with vertical loading for determination of soil shear strength changes following earthquakes[C]//International Conference on Geotechnical and Earthquake Engineering 2018.Chongqing:Chongqing University. DOI:10.1061/9780784482049.061
doi: 10.1061/9780784482049.061 |
|
Vouillamoz N, Rothmund S, Joswig M,2018.Characterizing the complexity of microseismic signals at slow-moving clay-rich debris slides:The Super-Sauze(southeastern France) and Pechgraben (Upper Austria) case studies[J].Earth Surface Dynamics,6(2):525-550. | |
Yfantis G, Pytharouli S, Lunn R J,et al,2020.Determination of the seismic signatures of landslides in soft soils:A methodology based on a field scale shear box[J].Engineering Geology,279:105853. | |
Yfantis G, Pytharouli S, Lunn R J,et al,2021.Microseismic monitoring illuminates phases of slope failure in soft soils[J].Engineering Geology,280:105940. | |
Zhang Lian, Wu Kaixing, Chen Lingkang,et al,2015.Overview of metallogenic features of ion adsorption type REE deposits in southern Jiangxi Province[J].Journal of the Chinese Society of Rare Earths,33(1):10-17. | |
Zhou Lingbo, Wang Xiaojun, Huang Chengguang,et al,2020.Experimental research on mechanical properties of ion adsorption rare earth in leaching process[J].Chinese Rare Earths,41(1):26-36. | |
陈飞,吴亚星,高阳,等,2015.复合挡土结构在稀土矿山滑坡防治中的应用研究[J].中国稀土学报,33(6):761-768. | |
陈乔,张阔,陈吉龙,等,2020.土剪破坏次声监测试验研究[J].力学学报,52(3):877-889. | |
池汝安,刘雪梅,2019.风化壳淋积型稀土矿开发的现状及展望[J].中国稀土学报,37(2):129-140. | |
池汝安,田君,2007.风化壳淋积型稀土矿评述[J].中国稀土学报,(6):641-650. | |
崔文杰,滕鹏晓,韩宝坤,2018.土质滑坡临滑前次声信号特征研究[J].声学技术,37(2):157-162. | |
黄万抚,邹志强,钟祥熙,等,2017.不同风化程度离子型稀土矿赋存特征及浸出规律研究[J].中国稀土学报,35(2):253-261. | |
南京水利科学研究院,1999. 土工试验规程: [S].北京:中国水利水电出版社. | |
张恋,吴开兴,陈陵康,等,2015.赣南离子吸附型稀土矿床成矿特征概述[J].中国稀土学报,33(1):10-17. | |
周凌波,王晓军,黄成光,等,2020.浸矿过程中离子吸附型稀土矿力学特性实验研究[J].稀土,41(1):26-36. |
[1] | 廖智勤, 王李管, 何正祥. 基于EEMD和关联维数的矿山微震信号特征提取和分类[J]. 黄金科学技术, 2020, 28(4): 585-594. |
[2] | 贺桂成, 陈科旭, 戴兵, 王程程. 十字交叉裂隙扩展机理试验与数值模拟研究[J]. 黄金科学技术, 2020, 28(4): 509-520. |
[3] | 刘晓明,赵君杰,彭平安,毕林,代碧波. 有效微震信号自动识别技术研究[J]. 黄金科学技术, 2017, 25(3): 84-91. |
|