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《Journal of Shandong University of Science and Technology(Natural Science)》 2010-04
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Numerical Simulation Study on Long-term Stability of Rooms and Pillars in Gypsum Mines

LIU Ru-jiang1,ZHANG Wei-min1,QIN Jia-fu1,ZHANG Yang-qiang2(1.Dept.of Production,Zibo Mining Group Co.Ltd.,Zibo,Shandong 255100,China;2.Key Laboratory of Mining Disaster Prevention and Control,Ministry of Education,SUST,Qingdao,Shandong 266510,China)  
It is significant for the study of long-term stability of rooms and pillars under the act of the overlying strata loads to ensure the safe production in gypsum mines.In the paper,the numerical simulation study for long-term stability of rooms and pillars in gypsum mines was carried out by use of the viscous-elastic-plastic constitutive model(cvisc model) of FLAC3D software.The results showed that after roadway excavation,the roof and floor convergences increased with the extension of time and eventually tended to stabilization;although the simulated maximum convergence of roofs and floors in rooms and at the sides of rooms reached 185.368 mm,67.734 mm within 10 years respectively,the deformations of rooms in whole were relatively small;the safety factor of ore pillar obtained by simulating the maximum vertical stress was 1.84;all above showed that the rooms and pillars could keep stability for a long time.The research results are of great significance for the reasonable design and stability analysis of rooms and pillars in similar conditions.
【CateGory Index】: TD325
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