初始溫度條件下全尾膠結膏體損傷本構模型

王勇; 吳愛祥; 王洪江; 王貽明; 崔亮; 靳斐; 周勃; 沈家華

doi:10.13374/j.issn2095-9389.2017.01.004

初始溫度條件下全尾膠結膏體損傷本構模型

doi: 10.13374/j.issn2095-9389.2017.01.004

王勇¹,
吳愛祥^1, ,,
王洪江¹,
王貽明¹,
崔亮²,
靳斐¹,
周勃¹,
沈家華³

1) 北京科技大學金屬礦山高效開采與安全教育部重點實驗室, 北京 100083
2) 渥太華大學土木工程學院, 渥太華 K1N 6N5, 加拿大
3) 中色非洲礦業有限公司, 基特韋, 贊比亞

基金項目:

北京市科委項目（Z161100001216002）；國家自然科學基金資助項目（51574013，51374034，51674012）；“十二五”國家科技支撐計劃課題（2013BAB02B05）

詳細信息

中圖分類號: TD823
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出版歷程
- 收稿日期: 2016-05-05

Damage constitutive model of cemented tailing paste under initial temperature effect

1) Key Laboratory of High-Efficient Mining and Safety of Metal Mines ofthe Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China
2) Department of Civil Engineering, University Ottawa, Ottawa, K1N 6N5, Canada
3) Africa Mining PLC of China Nonferrous Metals Co., Ltd., Kitwe, Zambia

摘要

摘要: 膏體充填料到達采場初始溫度不同是礦山存在的普遍現象，不同初始溫度條件下膏體力學特性及應力-應變關系直接影響到礦山采充周期及相鄰采場開采時貧化指標.通過對初始溫度為2、20、35和50℃的硬化膏體進行單軸抗壓強度試驗，獲得不同初始溫度下充填體應力-應變演化曲線.根據理論推導和試驗結果，建立了不同初始溫度下膏體損傷本構模型，通過本構模型參數回歸，提出膏體溫度-時間耦合損傷本構模型.最后，采用Comsol數值模擬軟件，將溫度-時間耦合損傷本構模型嵌入solid mechanics模塊，對單軸抗壓試驗進行數值模擬，模擬應力-應變曲線與試驗結果較為吻合，驗證了所提出本構模型的可靠性.
- 膏體 /
- 溫度 /
- 應力-應變曲線 /
- 本構模型 /
- 數值模擬
Abstract: It is a universal phenomenon for all the mines that paste-filling material arrives at stope at different initial temperatures. The strength properties and stress-strain relation of paste at different initial temperatures have effect on the mining-filling cycle and the dilution of adjacent stope mining. A series of uniaxial compressive strength tests were performed on hardened paste with initial temperatures of 2, 20, 35 and 50℃ to obtain the stress-strain evolution curves at different initial temperatures. The damage constitutive models of paste at different initial temperatures were established on the basis of theoretical derivation and experimental results. A temperature-time coupling damage constitutive model was further proposed according to parameter regression of the established models. Finally, the temperature-time coupling damage constitutive model was embed into the solid mechanics module of Comsol software, which is for uniaxial compressive experiment simulation. The simulation results show good accordance with the experimental stress-strain curves, verifying the reliability of the proposed constitutive model.
- paste /
- temperature /
- stress-strain curves /
- constitutive models /
- numerical simulation

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參考文獻(7)

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