爆破荷载作用下边坡渐进破坏模式的UDEC模拟研究
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摘要
运用二维离散元程序UDEC,以黄麦岭磷矿采场边坡为例,模拟了爆破荷载作用下层状岩质边坡渐进破坏的全过程。结果表明,爆破荷载作用下岩质边坡的破坏,是一个由潜在滑动面上的局部破坏逐步扩展到整体破坏的过程,同时也是一个滑动面上拉剪应力传递与转移的过程,其变形破坏过程可分为累进破坏和整体滑动两个阶段。
The progressive failure process of rock slope in Huangmailing phosphate mining under explosion is simulated by discrete element code UDEC.Results show that the failure of rock slope is from the local sliding face to the whole slope.At the same time,the failure process is the process of transmitting and transferring the tensile and shear stress.And the failure of slope is divided into two phase:the progressive failure phase and the whole sliding phase.
The progressive failure process of rock slope in Huangmailing phosphate mining under explosion is simulated by discrete element code UDEC.Results show that the failure of rock slope is from the local sliding face to the whole slope.At the same time,the failure process is the process of transmitting and transferring the tensile and shear stress.And the failure of slope is divided into two phase:the progressive failure phase and the whole sliding phase.
引文
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[2]谭文辉,王家臣,周汝弟.岩体边坡渐进破坏的物理模拟和数值模拟研究[J].中国矿业,2000,9(5)
[3]谭新.考虑降雨入渗的边坡稳定性分析[D][硕士学位论文].武汉:中国科学院武汉岩土力学研究所,2002
[4]毛彦龙,胡广韬,毛新虎,石耀武.地震滑坡启程剧动的机理研究及离散元模拟[J].工程地质学报,2001,9(1)
[5]UDEC(Universal Distinct Element Code)user's manual[R].Version3.0,Itasca Consulting Group.Inc.,1996
[6]湖北省孝感磷矿黄麦岭矿区黄麦岭矿段详细勘探总结报告[R].湖北省鄂东北地质大队,1986
[7]Lysmer,J.,and R.Kuhlemeyer,Finite Dynamics Model for Infinite Media[J].J.Eng.Mech.,Div.ASCE,95:EM4,1969
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