云南某露天矿山排土场边坡稳定性分析
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摘要
针对堆排高度对排土场稳定性的影响,以云南某露天矿小黑沟排土场为工程实例,运用FLAC3D非线性数值模拟,分析了排土场稳定性状况,为排土场后续堆排作业及边坡参数优化提供了理论依据。模拟结果表明,排土场当前及在该基础上加高两个台阶(40 m)后均处于稳定状态;排土场加高三个台阶(60 m)后,总堆排高度达到120 m,此时排土场边坡处于极限平衡状态,采取削坡卸载后,又达到稳定状态。
Aiming at the effect of the height of the stack and the discharge on the stability of the spoilbank,this paper offers a theoretically basis to the follow-up stack and discharge work for the spoilbank by taking a engineering example of the surface mining spoilbank of Xiaoheigou in Yunnan province.Using FLAC3 D to make a nonlinear numerical simulation,the stablity condition of the spoilbank was analysised.The result of the simulation indicated that the spoilbank would be stable at its present situation or after two stairsteps(40 m) were added to the foundation;The total height of the stack and discharge would be up to 120 m when three stairsteps were added to the foundation,by which the slope of the spoilbank would reach a ultimate state of balance,and it would be in a stable state again after unloading by means of cutting the slope.
Aiming at the effect of the height of the stack and the discharge on the stability of the spoilbank,this paper offers a theoretically basis to the follow-up stack and discharge work for the spoilbank by taking a engineering example of the surface mining spoilbank of Xiaoheigou in Yunnan province.Using FLAC3 D to make a nonlinear numerical simulation,the stablity condition of the spoilbank was analysised.The result of the simulation indicated that the spoilbank would be stable at its present situation or after two stairsteps(40 m) were added to the foundation;The total height of the stack and discharge would be up to 120 m when three stairsteps were added to the foundation,by which the slope of the spoilbank would reach a ultimate state of balance,and it would be in a stable state again after unloading by means of cutting the slope.
引文
[1]王光进,杨春和,张超,等.超高排土场粒径分级及其边坡稳定性分析研究[J].岩土力学,2011,32(3):905-1004.
[2]陈鹏,陈鹏飞.露天矿排土场边坡稳定性分析[J].辽宁工程技术大学学报(自然科学版),2010,29(6):1028-1031.
[3]王豪,弓长岭露天铁矿排土场边坡稳定性分析研究[D].长春:吉林大学,2010.
[4]孙玉科,杨志法,丁恩保,等.中国露天矿边坡稳定性研究[M].北京:中国科学技术出版社,1998.
[5]金文佳,杨泽,侯克鹏,等.尖山边坡稳定性的三维动态数值模拟分析[J].有色金属(矿山部分),2010,62(6):42-46.
[2]陈鹏,陈鹏飞.露天矿排土场边坡稳定性分析[J].辽宁工程技术大学学报(自然科学版),2010,29(6):1028-1031.
[3]王豪,弓长岭露天铁矿排土场边坡稳定性分析研究[D].长春:吉林大学,2010.
[4]孙玉科,杨志法,丁恩保,等.中国露天矿边坡稳定性研究[M].北京:中国科学技术出版社,1998.
[5]金文佳,杨泽,侯克鹏,等.尖山边坡稳定性的三维动态数值模拟分析[J].有色金属(矿山部分),2010,62(6):42-46.
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