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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (5): 101-106.doi: 10.11872/j.issn.1005-2518.2017.05.101

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Study on Relationship Between Pore Structure and Strength Weakening of Rare Earth Ore Under Seepage

ZHUO Yulong1，WANG Xiaojun 1，2，CAO Shirong 1，DENG Shuqiang 1，LI Yongxin 1，HAN Jianwen 1   

  1. 1.School of Resources and Environment Engineering，Jiangxi University of Science and Technology，Ganzhou    341000，Jiangxi，China；
    2.Jiangxi Key Laboratory of Mining Engineering，Jiangxi University of Science and Technology，Ganzhou    341000，Jiangxi，China
  • Received:2017-01-06 Revised:2017-06-22 Online:2017-10-30 Published:2018-02-12

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Abstract:

To obtain the rule of micro-pore structure and strength of remolded  rare earth samples during the pure water infiltration process，the experiments of indoor simulated leaching，nuclear magnetic resonance and triaxial compression were carried out.The results showed that the microscopic pores in the sample change from medium pore size to large pore size，and the main strength indexes（cohesion and internal friction angle） decreased sharply with leaching time increased.Comprehensive analysis indicated that the seepage action changes the pore structure of orebody to induce the weakening the strength of orebody，and the change of pore structure is the main inducement of weakening  the strength of orebody.

Key words: seepage, cohesion, angle of internal friction, nuclear magnetic resonance （NMR）, pore structure, strength

CLC Number: 

  • TU443

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