RESEARCH ON THE 3-D DEFORMATION EFFECT OF SURFACE MINE UNDER STEP-BY-STEP EXCAVATION AND ITS APPLICATIN TO MINING ENGINEERING
After building the line-slope engineering geological model and 3D computational model for slope geologic section No. 73200 in An Tai Bao surface mine, this paper analysed the 3D deformation effect of the slope engineering under step-by-step excavation by using FLAC3D technique. The results showed that the maximum displacement against the slope presented remarkable nonlinear deformation response characteristic according to the different excavated longths of the slope, namely there were one characteristic point and two distinct successive phases which were divided by the characteristic point in the nonlinear deformation response curve. Based on the above researched conclusion and the optimized method to controll mining of time and spatial steps of the west edge slope, the author put forward the countermeasures of shorting mining length, excavating by different regions,timely backfilling foot to protect the excavated slope, monitoring and feedback adjustment by studying on the nonlinear effect. These countermeasures not only shortened the exposure time of the slope engineering, but also utilized the slope 3D deformation spatial effect and the time effect of the slope rock strenght reduction constantly, and these countermeasures were good to improve the mechanical state, to control the maximum deformation, and to increase the stabilization of the slope.
Surface Mine Slope Engineering Numerical Simulation 3D Deformation Effect
SHUREN WANG MANCHAO HE HONGBIN ZHOU GANG LI
School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, 066004, China School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 10008
国际会议
第三届中日岩土工程研讨会(Proceedings of the 3rd Sino-Japan Geotechnical Symposium)
重庆
英文
632-638
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）